Repository navigation
Expand file tree
/
Copy pathgit-bisect.html
More file actions
1117 lines (1113 loc) · 55.4 KB
/
Copy pathgit-bisect.html
File metadata and controls
1117 lines (1113 loc) · 55.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta name="generator" content="Asciidoctor 2.0.26"/>
<title>git-bisect(1)</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"/>
<style>
/*! Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
/* Uncomment the following line when using as a custom stylesheet */
/* @import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"; */
html{font-family:sans-serif;-webkit-text-size-adjust:100%}
a{background:none}
a:focus{outline:thin dotted}
a:active,a:hover{outline:0}
h1{font-size:2em;margin:.67em 0}
b,strong{font-weight:bold}
abbr{font-size:.9em}
abbr[title]{cursor:help;border-bottom:1px dotted #dddddf;text-decoration:none}
dfn{font-style:italic}
hr{height:0}
mark{background:#ff0;color:#000}
code,kbd,pre,samp{font-family:monospace;font-size:1em}
pre{white-space:pre-wrap}
q{quotes:"\201C" "\201D" "\2018" "\2019"}
small{font-size:80%}
sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
sup{top:-.5em}
sub{bottom:-.25em}
img{border:0}
svg:not(:root){overflow:hidden}
figure{margin:0}
audio,video{display:inline-block}
audio:not([controls]){display:none;height:0}
fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}
legend{border:0;padding:0}
button,input,select,textarea{font-family:inherit;font-size:100%;margin:0}
button,input{line-height:normal}
button,select{text-transform:none}
button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer}
button[disabled],html input[disabled]{cursor:default}
input[type=checkbox],input[type=radio]{padding:0}
button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}
textarea{overflow:auto;vertical-align:top}
table{border-collapse:collapse;border-spacing:0}
*,::before,::after{box-sizing:border-box}
html,body{font-size:100%}
body{background:#fff;color:rgba(0,0,0,.8);padding:0;margin:0;font-family:"Noto Serif","DejaVu Serif",serif;line-height:1;position:relative;cursor:auto;-moz-tab-size:4;-o-tab-size:4;tab-size:4;word-wrap:anywhere;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased}
a:hover{cursor:pointer}
img,object,embed{max-width:100%;height:auto}
object,embed{height:100%}
img{-ms-interpolation-mode:bicubic}
.left{float:left!important}
.right{float:right!important}
.text-left{text-align:left!important}
.text-right{text-align:right!important}
.text-center{text-align:center!important}
.text-justify{text-align:justify!important}
.hide{display:none}
img,object,svg{display:inline-block;vertical-align:middle}
textarea{height:auto;min-height:50px}
select{width:100%}
.subheader,.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{line-height:1.45;color:#7a2518;font-weight:400;margin-top:0;margin-bottom:.25em}
div,dl,dt,dd,ul,ol,li,h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6,pre,form,p,blockquote,th,td{margin:0;padding:0}
a{color:#2156a5;text-decoration:underline;line-height:inherit}
a:hover,a:focus{color:#1d4b8f}
a img{border:0}
p{line-height:1.6;margin-bottom:1.25em;text-rendering:optimizeLegibility}
p aside{font-size:.875em;line-height:1.35;font-style:italic}
h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{font-family:"Open Sans","DejaVu Sans",sans-serif;font-weight:300;font-style:normal;color:#ba3925;text-rendering:optimizeLegibility;margin-top:1em;margin-bottom:.5em;line-height:1.0125em}
h1 small,h2 small,h3 small,#toctitle small,.sidebarblock>.content>.title small,h4 small,h5 small,h6 small{font-size:60%;color:#e99b8f;line-height:0}
h1{font-size:2.125em}
h2{font-size:1.6875em}
h3,#toctitle,.sidebarblock>.content>.title{font-size:1.375em}
h4,h5{font-size:1.125em}
h6{font-size:1em}
hr{border:solid #dddddf;border-width:1px 0 0;clear:both;margin:1.25em 0 1.1875em}
em,i{font-style:italic;line-height:inherit}
strong,b{font-weight:bold;line-height:inherit}
small{font-size:60%;line-height:inherit}
code{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-weight:400;color:rgba(0,0,0,.9)}
ul,ol,dl{line-height:1.6;margin-bottom:1.25em;list-style-position:outside;font-family:inherit}
ul,ol{margin-left:1.5em}
ul li ul,ul li ol{margin-left:1.25em;margin-bottom:0}
ul.circle{list-style-type:circle}
ul.disc{list-style-type:disc}
ul.square{list-style-type:square}
ul.circle ul:not([class]),ul.disc ul:not([class]),ul.square ul:not([class]){list-style:inherit}
ol li ul,ol li ol{margin-left:1.25em;margin-bottom:0}
dl dt{margin-bottom:.3125em;font-weight:bold}
dl dd{margin-bottom:1.25em}
blockquote{margin:0 0 1.25em;padding:.5625em 1.25em 0 1.1875em;border-left:1px solid #ddd}
blockquote,blockquote p{line-height:1.6;color:rgba(0,0,0,.85)}
@media screen and (min-width:768px){h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2}
h1{font-size:2.75em}
h2{font-size:2.3125em}
h3,#toctitle,.sidebarblock>.content>.title{font-size:1.6875em}
h4{font-size:1.4375em}}
table{background:#fff;margin-bottom:1.25em;border:1px solid #dedede;word-wrap:normal}
table thead,table tfoot{background:#f7f8f7}
table thead tr th,table thead tr td,table tfoot tr th,table tfoot tr td{padding:.5em .625em .625em;font-size:inherit;color:rgba(0,0,0,.8);text-align:left}
table tr th,table tr td{padding:.5625em .625em;font-size:inherit;color:rgba(0,0,0,.8)}
table tr.even,table tr.alt{background:#f8f8f7}
table thead tr th,table tfoot tr th,table tbody tr td,table tr td,table tfoot tr td{line-height:1.6}
h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2;word-spacing:-.05em}
h1 strong,h2 strong,h3 strong,#toctitle strong,.sidebarblock>.content>.title strong,h4 strong,h5 strong,h6 strong{font-weight:400}
.center{margin-left:auto;margin-right:auto}
.stretch{width:100%}
.clearfix::before,.clearfix::after,.float-group::before,.float-group::after{content:" ";display:table}
.clearfix::after,.float-group::after{clear:both}
:not(pre).nobreak{word-wrap:normal}
:not(pre).nowrap{white-space:nowrap}
:not(pre).pre-wrap{white-space:pre-wrap}
:not(pre):not([class^=L])>code{font-size:.9375em;font-style:normal!important;letter-spacing:0;padding:.1em .5ex;word-spacing:-.15em;background:#f7f7f8;border-radius:4px;line-height:1.45;text-rendering:optimizeSpeed}
pre{color:rgba(0,0,0,.9);font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;line-height:1.45;text-rendering:optimizeSpeed}
pre code,pre pre{color:inherit;font-size:inherit;line-height:inherit}
pre.nowrap,pre.nowrap pre{white-space:pre;word-wrap:normal}
em em{font-style:normal}
strong strong{font-weight:400}
.keyseq{color:rgba(51,51,51,.8)}
kbd{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background:#f7f7f7;border:1px solid #ccc;border-radius:3px;box-shadow:0 1px 0 rgba(0,0,0,.2),inset 0 0 0 .1em #fff;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
.keyseq kbd:first-child{margin-left:0}
.keyseq kbd:last-child{margin-right:0}
.menuseq,.menuref{color:#000}
.menuseq b:not(.caret),.menuref{font-weight:inherit}
.menuseq{word-spacing:-.02em}
.menuseq b.caret{font-size:1.25em;line-height:.8}
.menuseq i.caret{font-weight:bold;text-align:center;width:.45em}
b.button::before,b.button::after{position:relative;top:-1px;font-weight:400}
b.button::before{content:"[";padding:0 3px 0 2px}
b.button::after{content:"]";padding:0 2px 0 3px}
p a>code:hover{color:rgba(0,0,0,.9)}
#header,#content,#footnotes,#footer{width:100%;margin:0 auto;max-width:62.5em;*zoom:1;position:relative;padding-left:.9375em;padding-right:.9375em}
#header::before,#header::after,#content::before,#content::after,#footnotes::before,#footnotes::after,#footer::before,#footer::after{content:" ";display:table}
#header::after,#content::after,#footnotes::after,#footer::after{clear:both}
#content{margin-top:1.25em}
#content::before{content:none}
#header>h1:first-child{color:rgba(0,0,0,.85);margin-top:2.25rem;margin-bottom:0}
#header>h1:first-child+#toc{margin-top:8px;border-top:1px solid #dddddf}
#header>h1:only-child{border-bottom:1px solid #dddddf;padding-bottom:8px}
#header .details{border-bottom:1px solid #dddddf;line-height:1.45;padding-top:.25em;padding-bottom:.25em;padding-left:.25em;color:rgba(0,0,0,.6);display:flex;flex-flow:row wrap}
#header .details span:first-child{margin-left:-.125em}
#header .details span.email a{color:rgba(0,0,0,.85)}
#header .details br{display:none}
#header .details br+span::before{content:"\00a0\2013\00a0"}
#header .details br+span.author::before{content:"\00a0\22c5\00a0";color:rgba(0,0,0,.85)}
#header .details br+span#revremark::before{content:"\00a0|\00a0"}
#header #revnumber{text-transform:capitalize}
#header #revnumber::after{content:"\00a0"}
#content>h1:first-child:not([class]){color:rgba(0,0,0,.85);border-bottom:1px solid #dddddf;padding-bottom:8px;margin-top:0;padding-top:1rem;margin-bottom:1.25rem}
#toc{border-bottom:1px solid #e7e7e9;padding-bottom:.5em}
#toc>ul{margin-left:.125em}
#toc ul.sectlevel0>li>a{font-style:italic}
#toc ul.sectlevel0 ul.sectlevel1{margin:.5em 0}
#toc ul{font-family:"Open Sans","DejaVu Sans",sans-serif;list-style-type:none}
#toc li{line-height:1.3334;margin-top:.3334em}
#toc a{text-decoration:none}
#toc a:active{text-decoration:underline}
#toctitle{color:#7a2518;font-size:1.2em}
@media screen and (min-width:768px){#toctitle{font-size:1.375em}
body.toc2{padding-left:15em;padding-right:0}
body.toc2 #header>h1:nth-last-child(2){border-bottom:1px solid #dddddf;padding-bottom:8px}
#toc.toc2{margin-top:0!important;background:#f8f8f7;position:fixed;width:15em;left:0;top:0;border-right:1px solid #e7e7e9;border-top-width:0!important;border-bottom-width:0!important;z-index:1000;padding:1.25em 1em;height:100%;overflow:auto}
#toc.toc2 #toctitle{margin-top:0;margin-bottom:.8rem;font-size:1.2em}
#toc.toc2>ul{font-size:.9em;margin-bottom:0}
#toc.toc2 ul ul{margin-left:0;padding-left:1em}
#toc.toc2 ul.sectlevel0 ul.sectlevel1{padding-left:0;margin-top:.5em;margin-bottom:.5em}
body.toc2.toc-right{padding-left:0;padding-right:15em}
body.toc2.toc-right #toc.toc2{border-right-width:0;border-left:1px solid #e7e7e9;left:auto;right:0}}
@media screen and (min-width:1280px){body.toc2{padding-left:20em;padding-right:0}
#toc.toc2{width:20em}
#toc.toc2 #toctitle{font-size:1.375em}
#toc.toc2>ul{font-size:.95em}
#toc.toc2 ul ul{padding-left:1.25em}
body.toc2.toc-right{padding-left:0;padding-right:20em}}
#content #toc{border:1px solid #e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;border-radius:4px}
#content #toc>:first-child{margin-top:0}
#content #toc>:last-child{margin-bottom:0}
#footer{max-width:none;background:rgba(0,0,0,.8);padding:1.25em}
#footer-text{color:hsla(0,0%,100%,.8);line-height:1.44}
#content{margin-bottom:.625em}
.sect1{padding-bottom:.625em}
@media screen and (min-width:768px){#content{margin-bottom:1.25em}
.sect1{padding-bottom:1.25em}}
.sect1:last-child{padding-bottom:0}
.sect1+.sect1{border-top:1px solid #e7e7e9}
#content h1>a.anchor,h2>a.anchor,h3>a.anchor,#toctitle>a.anchor,.sidebarblock>.content>.title>a.anchor,h4>a.anchor,h5>a.anchor,h6>a.anchor{position:absolute;z-index:1001;width:1.5ex;margin-left:-1.5ex;display:block;text-decoration:none!important;visibility:hidden;text-align:center;font-weight:400}
#content h1>a.anchor::before,h2>a.anchor::before,h3>a.anchor::before,#toctitle>a.anchor::before,.sidebarblock>.content>.title>a.anchor::before,h4>a.anchor::before,h5>a.anchor::before,h6>a.anchor::before{content:"\00A7";font-size:.85em;display:block;padding-top:.1em}
#content h1:hover>a.anchor,#content h1>a.anchor:hover,h2:hover>a.anchor,h2>a.anchor:hover,h3:hover>a.anchor,#toctitle:hover>a.anchor,.sidebarblock>.content>.title:hover>a.anchor,h3>a.anchor:hover,#toctitle>a.anchor:hover,.sidebarblock>.content>.title>a.anchor:hover,h4:hover>a.anchor,h4>a.anchor:hover,h5:hover>a.anchor,h5>a.anchor:hover,h6:hover>a.anchor,h6>a.anchor:hover{visibility:visible}
#content h1>a.link,h2>a.link,h3>a.link,#toctitle>a.link,.sidebarblock>.content>.title>a.link,h4>a.link,h5>a.link,h6>a.link{color:#ba3925;text-decoration:none}
#content h1>a.link:hover,h2>a.link:hover,h3>a.link:hover,#toctitle>a.link:hover,.sidebarblock>.content>.title>a.link:hover,h4>a.link:hover,h5>a.link:hover,h6>a.link:hover{color:#a53221}
details,.audioblock,.imageblock,.literalblock,.listingblock,.stemblock,.videoblock{margin-bottom:1.25em}
details{margin-left:1.25rem}
details>summary{cursor:pointer;display:block;position:relative;line-height:1.6;margin-bottom:.625rem;outline:none;-webkit-tap-highlight-color:transparent}
details>summary::-webkit-details-marker{display:none}
details>summary::before{content:"";border:solid transparent;border-left:solid;border-width:.3em 0 .3em .5em;position:absolute;top:.5em;left:-1.25rem;transform:translateX(15%)}
details[open]>summary::before{border:solid transparent;border-top:solid;border-width:.5em .3em 0;transform:translateY(15%)}
details>summary::after{content:"";width:1.25rem;height:1em;position:absolute;top:.3em;left:-1.25rem}
.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{text-rendering:optimizeLegibility;text-align:left;font-family:"Noto Serif","DejaVu Serif",serif;font-size:1rem;font-style:italic}
table.tableblock.fit-content>caption.title{white-space:nowrap;width:0}
.paragraph.lead>p,#preamble>.sectionbody>[class=paragraph]:first-of-type p{font-size:1.21875em;line-height:1.6;color:rgba(0,0,0,.85)}
.admonitionblock>table{border-collapse:separate;border:0;background:none;width:100%}
.admonitionblock>table td.icon{text-align:center;width:80px}
.admonitionblock>table td.icon img{max-width:none}
.admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
.admonitionblock>table td.content{padding-left:1.125em;padding-right:1.25em;border-left:1px solid #dddddf;color:rgba(0,0,0,.6);word-wrap:anywhere}
.admonitionblock>table td.content>:last-child>:last-child{margin-bottom:0}
.exampleblock>.content{border:1px solid #e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;border-radius:4px}
.sidebarblock{border:1px solid #dbdbd6;margin-bottom:1.25em;padding:1.25em;background:#f3f3f2;border-radius:4px}
.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
.exampleblock>.content>:first-child,.sidebarblock>.content>:first-child{margin-top:0}
.exampleblock>.content>:last-child,.exampleblock>.content>:last-child>:last-child,.exampleblock>.content .olist>ol>li:last-child>:last-child,.exampleblock>.content .ulist>ul>li:last-child>:last-child,.exampleblock>.content .qlist>ol>li:last-child>:last-child,.sidebarblock>.content>:last-child,.sidebarblock>.content>:last-child>:last-child,.sidebarblock>.content .olist>ol>li:last-child>:last-child,.sidebarblock>.content .ulist>ul>li:last-child>:last-child,.sidebarblock>.content .qlist>ol>li:last-child>:last-child{margin-bottom:0}
.literalblock pre,.listingblock>.content>pre{border-radius:4px;overflow-x:auto;padding:1em;font-size:.8125em}
@media screen and (min-width:768px){.literalblock pre,.listingblock>.content>pre{font-size:.90625em}}
@media screen and (min-width:1280px){.literalblock pre,.listingblock>.content>pre{font-size:1em}}
.literalblock pre,.listingblock>.content>pre:not(.highlight),.listingblock>.content>pre[class=highlight],.listingblock>.content>pre[class^="highlight "]{background:#f7f7f8}
.literalblock.output pre{color:#f7f7f8;background:rgba(0,0,0,.9)}
.listingblock>.content{position:relative}
.listingblock pre>code{display:block}
.listingblock code[data-lang]::before{display:none;content:attr(data-lang);position:absolute;font-size:.75em;top:.425rem;right:.5rem;line-height:1;text-transform:uppercase;color:inherit;opacity:.5}
.listingblock:hover code[data-lang]::before{display:block}
.listingblock.terminal pre .command::before{content:attr(data-prompt);padding-right:.5em;color:inherit;opacity:.5}
.listingblock.terminal pre .command:not([data-prompt])::before{content:"$"}
.listingblock pre.highlightjs{padding:0}
.listingblock pre.highlightjs>code{padding:1em;border-radius:4px}
.listingblock pre.prettyprint{border-width:0}
.prettyprint{background:#f7f7f8}
pre.prettyprint .linenums{line-height:1.45;margin-left:2em}
pre.prettyprint li{background:none;list-style-type:inherit;padding-left:0}
pre.prettyprint li code[data-lang]::before{opacity:1}
pre.prettyprint li:not(:first-child) code[data-lang]::before{display:none}
table.linenotable{border-collapse:separate;border:0;margin-bottom:0;background:none}
table.linenotable td[class]{color:inherit;vertical-align:top;padding:0;line-height:inherit;white-space:normal}
table.linenotable td.code{padding-left:.75em}
table.linenotable td.linenos,pre.pygments .linenos{border-right:1px solid;opacity:.35;padding-right:.5em;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}
pre.pygments span.linenos{display:inline-block;margin-right:.75em}
.quoteblock{margin:0 1em 1.25em 1.5em;display:table}
.quoteblock:not(.excerpt)>.title{margin-left:-1.5em;margin-bottom:.75em}
.quoteblock blockquote,.quoteblock p{color:rgba(0,0,0,.85);font-size:1.15rem;line-height:1.75;word-spacing:.1em;letter-spacing:0;font-style:italic;text-align:justify}
.quoteblock blockquote{margin:0;padding:0;border:0}
.quoteblock blockquote::before{content:"\201c";float:left;font-size:2.75em;font-weight:bold;line-height:.6em;margin-left:-.6em;color:#7a2518;text-shadow:0 1px 2px rgba(0,0,0,.1)}
.quoteblock blockquote>.paragraph:last-child p{margin-bottom:0}
.quoteblock .attribution{margin-top:.75em;margin-right:.5ex;text-align:right}
.verseblock{margin:0 1em 1.25em}
.verseblock pre{font-family:"Open Sans","DejaVu Sans",sans-serif;font-size:1.15rem;color:rgba(0,0,0,.85);font-weight:300;text-rendering:optimizeLegibility}
.verseblock pre strong{font-weight:400}
.verseblock .attribution{margin-top:1.25rem;margin-left:.5ex}
.quoteblock .attribution,.verseblock .attribution{font-size:.9375em;line-height:1.45;font-style:italic}
.quoteblock .attribution br,.verseblock .attribution br{display:none}
.quoteblock .attribution cite,.verseblock .attribution cite{display:block;letter-spacing:-.025em;color:rgba(0,0,0,.6)}
.quoteblock.abstract blockquote::before,.quoteblock.excerpt blockquote::before,.quoteblock .quoteblock blockquote::before{display:none}
.quoteblock.abstract blockquote,.quoteblock.abstract p,.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{line-height:1.6;word-spacing:0}
.quoteblock.abstract{margin:0 1em 1.25em;display:block}
.quoteblock.abstract>.title{margin:0 0 .375em;font-size:1.15em;text-align:center}
.quoteblock.excerpt>blockquote,.quoteblock .quoteblock{padding:0 0 .25em 1em;border-left:.25em solid #dddddf}
.quoteblock.excerpt,.quoteblock .quoteblock{margin-left:0}
.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{color:inherit;font-size:1.0625rem}
.quoteblock.excerpt .attribution,.quoteblock .quoteblock .attribution{color:inherit;font-size:.85rem;text-align:left;margin-right:0}
p.tableblock:last-child{margin-bottom:0}
td.tableblock>.content{margin-bottom:1.25em;word-wrap:anywhere}
td.tableblock>.content>:last-child{margin-bottom:-1.25em}
table.tableblock,th.tableblock,td.tableblock{border:0 solid #dedede}
table.grid-all>*>tr>*{border-width:1px}
table.grid-cols>*>tr>*{border-width:0 1px}
table.grid-rows>*>tr>*{border-width:1px 0}
table.frame-all{border-width:1px}
table.frame-ends{border-width:1px 0}
table.frame-sides{border-width:0 1px}
table.frame-none>colgroup+*>:first-child>*,table.frame-sides>colgroup+*>:first-child>*{border-top-width:0}
table.frame-none>:last-child>:last-child>*,table.frame-sides>:last-child>:last-child>*{border-bottom-width:0}
table.frame-none>*>tr>:first-child,table.frame-ends>*>tr>:first-child{border-left-width:0}
table.frame-none>*>tr>:last-child,table.frame-ends>*>tr>:last-child{border-right-width:0}
table.stripes-all>*>tr,table.stripes-odd>*>tr:nth-of-type(odd),table.stripes-even>*>tr:nth-of-type(even),table.stripes-hover>*>tr:hover{background:#f8f8f7}
th.halign-left,td.halign-left{text-align:left}
th.halign-right,td.halign-right{text-align:right}
th.halign-center,td.halign-center{text-align:center}
th.valign-top,td.valign-top{vertical-align:top}
th.valign-bottom,td.valign-bottom{vertical-align:bottom}
th.valign-middle,td.valign-middle{vertical-align:middle}
table thead th,table tfoot th{font-weight:bold}
tbody tr th{background:#f7f8f7}
tbody tr th,tbody tr th p,tfoot tr th,tfoot tr th p{color:rgba(0,0,0,.8);font-weight:bold}
p.tableblock>code:only-child{background:none;padding:0}
p.tableblock{font-size:1em}
ol{margin-left:1.75em}
ul li ol{margin-left:1.5em}
dl dd{margin-left:1.125em}
dl dd:last-child,dl dd:last-child>:last-child{margin-bottom:0}
li p,ul dd,ol dd,.olist .olist,.ulist .ulist,.ulist .olist,.olist .ulist{margin-bottom:.625em}
ul.checklist,ul.none,ol.none,ul.no-bullet,ol.no-bullet,ol.unnumbered,ul.unstyled,ol.unstyled{list-style-type:none}
ul.no-bullet,ol.no-bullet,ol.unnumbered{margin-left:.625em}
ul.unstyled,ol.unstyled{margin-left:0}
li>p:empty:only-child::before{content:"";display:inline-block}
ul.checklist>li>p:first-child{margin-left:-1em}
ul.checklist>li>p:first-child>.fa-square-o:first-child,ul.checklist>li>p:first-child>.fa-check-square-o:first-child{width:1.25em;font-size:.8em;position:relative;bottom:.125em}
ul.checklist>li>p:first-child>input[type=checkbox]:first-child{margin-right:.25em}
ul.inline{display:flex;flex-flow:row wrap;list-style:none;margin:0 0 .625em -1.25em}
ul.inline>li{margin-left:1.25em}
.unstyled dl dt{font-weight:400;font-style:normal}
ol.arabic{list-style-type:decimal}
ol.decimal{list-style-type:decimal-leading-zero}
ol.loweralpha{list-style-type:lower-alpha}
ol.upperalpha{list-style-type:upper-alpha}
ol.lowerroman{list-style-type:lower-roman}
ol.upperroman{list-style-type:upper-roman}
ol.lowergreek{list-style-type:lower-greek}
.hdlist>table,.colist>table{border:0;background:none}
.hdlist>table>tbody>tr,.colist>table>tbody>tr{background:none}
td.hdlist1,td.hdlist2{vertical-align:top;padding:0 .625em}
td.hdlist1{font-weight:bold;padding-bottom:1.25em}
td.hdlist2{word-wrap:anywhere}
.literalblock+.colist,.listingblock+.colist{margin-top:-.5em}
.colist td:not([class]):first-child{padding:.4em .75em 0;line-height:1;vertical-align:top}
.colist td:not([class]):first-child img{max-width:none}
.colist td:not([class]):last-child{padding:.25em 0}
.thumb,.th{line-height:0;display:inline-block;border:4px solid #fff;box-shadow:0 0 0 1px #ddd}
.imageblock.left{margin:.25em .625em 1.25em 0}
.imageblock.right{margin:.25em 0 1.25em .625em}
.imageblock>.title{margin-bottom:0}
.imageblock.thumb,.imageblock.th{border-width:6px}
.imageblock.thumb>.title,.imageblock.th>.title{padding:0 .125em}
.image.left,.image.right{margin-top:.25em;margin-bottom:.25em;display:inline-block;line-height:0}
.image.left{margin-right:.625em}
.image.right{margin-left:.625em}
a.image{text-decoration:none;display:inline-block}
a.image object{pointer-events:none}
sup.footnote,sup.footnoteref{font-size:.875em;position:static;vertical-align:super}
sup.footnote a,sup.footnoteref a{text-decoration:none}
sup.footnote a:active,sup.footnoteref a:active,#footnotes .footnote a:first-of-type:active{text-decoration:underline}
#footnotes{padding-top:.75em;padding-bottom:.75em;margin-bottom:.625em}
#footnotes hr{width:20%;min-width:6.25em;margin:-.25em 0 .75em;border-width:1px 0 0}
#footnotes .footnote{padding:0 .375em 0 .225em;line-height:1.3334;font-size:.875em;margin-left:1.2em;margin-bottom:.2em}
#footnotes .footnote a:first-of-type{font-weight:bold;text-decoration:none;margin-left:-1.05em}
#footnotes .footnote:last-of-type{margin-bottom:0}
#content #footnotes{margin-top:-.625em;margin-bottom:0;padding:.75em 0}
div.unbreakable{page-break-inside:avoid}
.big{font-size:larger}
.small{font-size:smaller}
.underline{text-decoration:underline}
.overline{text-decoration:overline}
.line-through{text-decoration:line-through}
.aqua{color:#00bfbf}
.aqua-background{background:#00fafa}
.black{color:#000}
.black-background{background:#000}
.blue{color:#0000bf}
.blue-background{background:#0000fa}
.fuchsia{color:#bf00bf}
.fuchsia-background{background:#fa00fa}
.gray{color:#606060}
.gray-background{background:#7d7d7d}
.green{color:#006000}
.green-background{background:#007d00}
.lime{color:#00bf00}
.lime-background{background:#00fa00}
.maroon{color:#600000}
.maroon-background{background:#7d0000}
.navy{color:#000060}
.navy-background{background:#00007d}
.olive{color:#606000}
.olive-background{background:#7d7d00}
.purple{color:#600060}
.purple-background{background:#7d007d}
.red{color:#bf0000}
.red-background{background:#fa0000}
.silver{color:#909090}
.silver-background{background:#bcbcbc}
.teal{color:#006060}
.teal-background{background:#007d7d}
.white{color:#bfbfbf}
.white-background{background:#fafafa}
.yellow{color:#bfbf00}
.yellow-background{background:#fafa00}
span.icon>.fa{cursor:default}
a span.icon>.fa{cursor:inherit}
.admonitionblock td.icon [class^="fa icon-"]{font-size:2.5em;text-shadow:1px 1px 2px rgba(0,0,0,.5);cursor:default}
.admonitionblock td.icon .icon-note::before{content:"\f05a";color:#19407c}
.admonitionblock td.icon .icon-tip::before{content:"\f0eb";text-shadow:1px 1px 2px rgba(155,155,0,.8);color:#111}
.admonitionblock td.icon .icon-warning::before{content:"\f071";color:#bf6900}
.admonitionblock td.icon .icon-caution::before{content:"\f06d";color:#bf3400}
.admonitionblock td.icon .icon-important::before{content:"\f06a";color:#bf0000}
.conum[data-value]{display:inline-block;color:#fff!important;background:rgba(0,0,0,.8);border-radius:50%;text-align:center;font-size:.75em;width:1.67em;height:1.67em;line-height:1.67em;font-family:"Open Sans","DejaVu Sans",sans-serif;font-style:normal;font-weight:bold}
.conum[data-value] *{color:#fff!important}
.conum[data-value]+b{display:none}
.conum[data-value]::after{content:attr(data-value)}
pre .conum[data-value]{position:relative;top:-.125em}
b.conum *{color:inherit!important}
.conum:not([data-value]):empty{display:none}
dt,th.tableblock,td.content,div.footnote{text-rendering:optimizeLegibility}
h1,h2,p,td.content,span.alt,summary{letter-spacing:-.01em}
p strong,td.content strong,div.footnote strong{letter-spacing:-.005em}
p,blockquote,dt,td.content,td.hdlist1,span.alt,summary{font-size:1.0625rem}
p{margin-bottom:1.25rem}
.sidebarblock p,.sidebarblock dt,.sidebarblock td.content,p.tableblock{font-size:1em}
.exampleblock>.content{background:#fffef7;border-color:#e0e0dc;box-shadow:0 1px 4px #e0e0dc}
.print-only{display:none!important}
@page{margin:1.25cm .75cm}
@media print{*{box-shadow:none!important;text-shadow:none!important}
html{font-size:80%}
a{color:inherit!important;text-decoration:underline!important}
a.bare,a[href^="#"],a[href^="mailto:"]{text-decoration:none!important}
a[href^="http:"]:not(.bare)::after,a[href^="https:"]:not(.bare)::after{content:"(" attr(href) ")";display:inline-block;font-size:.875em;padding-left:.25em}
abbr[title]{border-bottom:1px dotted}
abbr[title]::after{content:" (" attr(title) ")"}
pre,blockquote,tr,img,object,svg{page-break-inside:avoid}
thead{display:table-header-group}
svg{max-width:100%}
p,blockquote,dt,td.content{font-size:1em;orphans:3;widows:3}
h2,h3,#toctitle,.sidebarblock>.content>.title{page-break-after:avoid}
#header,#content,#footnotes,#footer{max-width:none}
#toc,.sidebarblock,.exampleblock>.content{background:none!important}
#toc{border-bottom:1px solid #dddddf!important;padding-bottom:0!important}
body.book #header{text-align:center}
body.book #header>h1:first-child{border:0!important;margin:2.5em 0 1em}
body.book #header .details{border:0!important;display:block;padding:0!important}
body.book #header .details span:first-child{margin-left:0!important}
body.book #header .details br{display:block}
body.book #header .details br+span::before{content:none!important}
body.book #toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important}
body.book #toc,body.book #preamble,body.book h1.sect0,body.book .sect1>h2{page-break-before:always}
.listingblock code[data-lang]::before{display:block}
#footer{padding:0 .9375em}
.hide-on-print{display:none!important}
.print-only{display:block!important}
.hide-for-print{display:none!important}
.show-for-print{display:inherit!important}}
@media amzn-kf8,print{#header>h1:first-child{margin-top:1.25rem}
.sect1{padding:0!important}
.sect1+.sect1{border:0}
#footer{background:none}
#footer-text{color:rgba(0,0,0,.6);font-size:.9em}}
@media amzn-kf8{#header,#content,#footnotes,#footer{padding:0}}
</style>
<style>
pre>code {
display: inline;
}
</style>
</head>
<body class="manpage">
<div id="header">
<h1>git-bisect(1) Manual Page</h1>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>git-bisect - Use binary search to find the commit that introduced a bug</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>start</code> [<code>--term-</code>(<code>bad</code>|<code>new</code>)<code>=</code><em><term-new></em> <code>--term-</code>(<code>good</code>|<code>old</code>)<code>=</code><em><term-old></em>]
[<code>--no-checkout</code>] [<code>--first-parent</code>] [<code>--reset-when-found</code>[<code>=</code><em><where></em>]] [<em><bad></em> [<em><good></em>…​]] [<code>--</code>] [<em><pathspec></em>…​]
<code>git</code> <code>bisect</code> (<code>bad</code>|<code>new</code>|<em><term-new></em>) [<em><rev></em>]
<code>git</code> <code>bisect</code> (<code>good</code>|<code>old</code>|<em><term-old></em>) [<em><rev></em>…​]
<code>git</code> <code>bisect</code> <code>terms</code> [<code>--term-</code>(<code>good</code>|<code>old</code>) | <code>--term-</code>(<code>bad</code>|<code>new</code>)]
<code>git</code> <code>bisect</code> <code>skip</code> [(<em><rev></em>|<em><range></em>)…​]
<code>git</code> <code>bisect</code> <code>next</code>
<code>git</code> <code>bisect</code> <code>reset</code> [<em><commit></em>]
<code>git</code> <code>bisect</code> (<code>visualize</code>|<code>view</code>)
<code>git</code> <code>bisect</code> <code>replay</code> <em><logfile></em>
<code>git</code> <code>bisect</code> <code>log</code>
<code>git</code> <code>bisect</code> <code>run</code> [<code>--reset-when-found</code>[<code>=</code><em><where></em>]] <em><cmd></em> [<em><arg></em>…​]
<code>git</code> <code>bisect</code> <code>help</code></pre>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This command uses a binary search algorithm to find which commit in
your project’s history introduced a bug. You use it by first telling
it a "bad" commit that is known to contain the bug, and a "good"
commit that is known to be before the bug was introduced. Then <code>git</code>
<code>bisect</code> picks a commit between those two endpoints and asks you
whether the selected commit is "good" or "bad". It continues narrowing
down the range until it finds the exact commit that introduced the
change.</p>
</div>
<div class="paragraph">
<p>In fact, <code>git</code> <code>bisect</code> can be used to find the commit that changed
<strong>any</strong> property of your project; e.g., the commit that fixed a bug, or
the commit that caused a benchmark’s performance to improve. To
support this more general usage, the terms "old" and "new" can be used
in place of "good" and "bad", or you can choose your own terms. See
section "Alternate terms" below for more information.</p>
</div>
<div class="sect2">
<h3 id="_basic_bisect_commands_start_bad_good">Basic bisect commands: start, bad, good</h3>
<div class="paragraph">
<p>As an example, suppose you are trying to find the commit that broke a
feature that was known to work in version <code>v2.6.13-rc2</code> of your
project. You start a bisect session as follows:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start
$ git bisect bad # Current version is bad
$ git bisect good v2.6.13-rc2 # v2.6.13-rc2 is known to be good</pre>
</div>
</div>
<div class="paragraph">
<p>Once you have specified at least one bad and one good commit, <code>git</code>
<code>bisect</code> selects a commit in the middle of that range of history,
checks it out, and outputs something similar to the following:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>Bisecting: 675 revisions left to test after this (roughly 10 steps)</pre>
</div>
</div>
<div class="paragraph">
<p>You should now compile the checked-out version and test it. If that
version works correctly, type</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect good</pre>
</div>
</div>
<div class="paragraph">
<p>If that version is broken, type</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect bad</pre>
</div>
</div>
<div class="paragraph">
<p>Then <code>git</code> <code>bisect</code> will respond with something like</p>
</div>
<div class="listingblock">
<div class="content">
<pre>Bisecting: 337 revisions left to test after this (roughly 9 steps)</pre>
</div>
</div>
<div class="paragraph">
<p>Keep repeating the process: compile the tree, test it, and depending
on whether it is good or bad run <code>git</code> <code>bisect</code> <code>good</code> or <code>git</code> <code>bisect</code> <code>bad</code>
to ask for the next commit that needs testing.</p>
</div>
<div class="paragraph">
<p>Eventually there will be no more revisions left to inspect, and the
command will print out a description of the first bad commit. The
reference <code>refs/bisect/bad</code> will be left pointing at that commit.</p>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_reset">Bisect reset</h3>
<div class="paragraph">
<p>After a bisect session, to clean up the bisection state and return to
the original <code>HEAD</code>, issue the following command:</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>reset</code></pre>
</div>
<div class="paragraph">
<p>By default, this will return your tree to the commit that was checked
out before <code>git</code> <code>bisect</code> <code>start</code>. (A new <code>git</code> <code>bisect</code> <code>start</code> will also do
that, as it cleans up the old bisection state.)</p>
</div>
<div class="paragraph">
<p>With an optional argument, you can return to a different commit
instead:</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>reset</code> <em><commit></em></pre>
</div>
<div class="paragraph">
<p>For example, <code>git</code> <code>bisect</code> <code>reset</code> <code>bisect/bad</code> will check out the first
bad revision, while <code>git</code> <code>bisect</code> <code>reset</code> <code>HEAD</code> will leave you on the
current bisection commit and avoid switching commits at all.</p>
</div>
</div>
<div class="sect2">
<h3 id="_alternate_terms">Alternate terms</h3>
<div class="paragraph">
<p>Sometimes you are not looking for the commit that introduced a
breakage, but rather for a commit that caused a change between some
other "old" state and "new" state. For example, you might be looking
for the commit that introduced a particular fix. Or you might be
looking for the first commit in which the source-code filenames were
finally all converted to your company’s naming standard. Or whatever.</p>
</div>
<div class="paragraph">
<p>In such cases it can be very confusing to use the terms "good" and
"bad" to refer to "the state before the change" and "the state after
the change". So instead, you can use the terms "old" and "new",
respectively, in place of "good" and "bad". (But note that you cannot
mix "good" and "bad" with "old" and "new" in a single session.)</p>
</div>
<div class="paragraph">
<p>In this more general usage, you provide <code>git</code> <code>bisect</code> with a "new"
commit that has some property and an "old" commit that doesn’t have that
property. Each time <code>git</code> <code>bisect</code> checks out a commit, you test if that
commit has the property. If it does, mark the commit as "new";
otherwise, mark it as "old". When the bisection is done, <code>git</code> <code>bisect</code>
will report which commit introduced the property.</p>
</div>
<div class="paragraph">
<p>To use "old" and "new" instead of "good" and bad, you must run <code>git</code>
<code>bisect</code> <code>start</code> without commits as argument and then run the following
commands to add the commits:</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>old</code> [<em><rev></em>]</pre>
</div>
<div class="paragraph">
<p>to indicate that a commit was before the sought change, or</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>new</code> [<em><rev></em>…​]</pre>
</div>
<div class="paragraph">
<p>to indicate that it was after.</p>
</div>
<div class="paragraph">
<p>To get a reminder of the currently used terms, use</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>terms</code></pre>
</div>
<div class="paragraph">
<p>You can get just the old term with <code>git</code> <code>bisect</code> <code>terms</code> <code>--term-old</code>
or <code>git</code> <code>bisect</code> <code>terms</code> <code>--term-good</code>; <code>git</code> <code>bisect</code> <code>terms</code> <code>--term-new</code>
and <code>git</code> <code>bisect</code> <code>terms</code> <code>--term-bad</code> can be used to learn how to call
the commits more recent than the sought change.</p>
</div>
<div class="paragraph">
<p>If you would like to use your own terms instead of "bad"/"good" or
"new"/"old", you can choose any names you like (except existing bisect
subcommands like <code>reset</code>, <code>start</code>, …​) by starting the
bisection using</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>start</code> <code>--term-old</code> <em><term-old></em> <code>--term-new</code> <em><term-new></em></pre>
</div>
<div class="paragraph">
<p>For example, if you are looking for a commit that introduced a
performance regression, you might use</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start --term-old fast --term-new slow</pre>
</div>
</div>
<div class="paragraph">
<p>Or if you are looking for the commit that fixed a bug, you might use</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start --term-new fixed --term-old broken</pre>
</div>
</div>
<div class="paragraph">
<p>Then, use <code>git</code> <code>bisect</code> <em><term-old></em> and <code>git</code> <code>bisect</code> <em><term-new></em> instead
of <code>git</code> <code>bisect</code> <code>good</code> and <code>git</code> <code>bisect</code> <code>bad</code> to mark commits.</p>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_visualizeview">Bisect visualize/view</h3>
<div class="paragraph">
<p>To see the currently remaining suspects in <code>gitk</code>, issue the following
command during the bisection process (the subcommand <code>view</code> can be used
as an alternative to <code>visualize</code>):</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect visualize</pre>
</div>
</div>
<div class="paragraph">
<p>Git detects a graphical environment through various environment variables:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1"><code>DISPLAY</code></dt>
<dd>
<p>which is set in X Window System environments on Unix systems.</p>
</dd>
<dt class="hdlist1"><code>SESSIONNAME</code></dt>
<dd>
<p>which is set under Cygwin in interactive desktop sessions.</p>
</dd>
<dt class="hdlist1"><code>MSYSTEM</code></dt>
<dd>
<p>which is set under Msys2 and Git for Windows.</p>
</dd>
<dt class="hdlist1"><code>SECURITYSESSIONID</code></dt>
<dd>
<p>which may be set on macOS in interactive desktop sessions.</p>
</dd>
</dl>
</div>
<div class="paragraph">
<p>If none of these environment variables is set, <code>git</code> <code>log</code> is used instead.
You can also give command-line options such as <code>-p</code> and <code>--stat</code>.</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect visualize --stat</pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_log_and_bisect_replay">Bisect log and bisect replay</h3>
<div class="paragraph">
<p>After having marked revisions as good or bad, issue the following
command to show what has been done so far:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect log</pre>
</div>
</div>
<div class="paragraph">
<p>If you discover that you made a mistake in specifying the status of a
revision, you can save the output of this command to a file, edit it to
remove the incorrect entries, and then issue the following commands to
return to a corrected state:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect reset
$ git bisect replay that-file</pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_avoiding_testing_a_commit">Avoiding testing a commit</h3>
<div class="paragraph">
<p>If, in the middle of a bisect session, you know that the suggested
revision is not a good one to test (e.g. it fails to build and you
know that the failure does not have anything to do with the bug you
are chasing), you can manually select a nearby commit and test that
one instead.</p>
</div>
<div class="paragraph">
<p>For example:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect good/bad # previous round was good or bad.
Bisecting: 337 revisions left to test after this (roughly 9 steps)
$ git bisect visualize # oops, that is uninteresting.
$ git reset --hard HEAD~3 # try 3 revisions before what
# was suggested</pre>
</div>
</div>
<div class="paragraph">
<p>Then compile and test the chosen revision, and afterwards mark
the revision as good or bad in the usual manner.</p>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_skip">Bisect skip</h3>
<div class="paragraph">
<p>Instead of choosing a nearby commit by yourself, you can ask Git to do
it for you by issuing the command:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect skip # Current version cannot be tested</pre>
</div>
</div>
<div class="paragraph">
<p>However, if you skip a commit adjacent to the one you are looking for,
Git will be unable to tell exactly which of those commits was the
first bad one.</p>
</div>
<div class="paragraph">
<p>You can also skip a range of commits, instead of just one commit,
using range notation. For example:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect skip v2.5..v2.6</pre>
</div>
</div>
<div class="paragraph">
<p>This tells the bisect process that no commit after <code>v2.5</code>, up to and
including <code>v2.6</code>, should be tested.</p>
</div>
<div class="paragraph">
<p>Note that if you also want to skip the first commit of the range you
would issue the command:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect skip v2.5 v2.5..v2.6</pre>
</div>
</div>
<div class="paragraph">
<p>This tells the bisect process that the commits between <code>v2.5</code> and
<code>v2.6</code> (inclusive) should be skipped.</p>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_next">Bisect next</h3>
<div class="paragraph">
<p>Normally, after marking a revision as good or bad, Git automatically
computes and checks out the next revision to test. However, if you need to
explicitly request the next bisection step, you can use:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect next</pre>
</div>
</div>
<div class="paragraph">
<p>You might use this to resume the bisection process after interrupting it
by checking out a different revision.</p>
</div>
</div>
<div class="sect2">
<h3 id="_cutting_down_bisection_by_giving_more_parameters_to_bisect_start">Cutting down bisection by giving more parameters to bisect start</h3>
<div class="paragraph">
<p>You can further cut down the number of trials, if you know what part of
the tree is involved in the problem you are tracking down, by specifying
pathspec parameters when issuing the <code>bisect</code> <code>start</code> command:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start -- arch/i386 include/asm-i386</pre>
</div>
</div>
<div class="paragraph">
<p>If you know beforehand more than one good commit, you can narrow the
bisect space down by specifying all of the good commits immediately after
the bad commit when issuing the <code>bisect</code> <code>start</code> command:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start v2.6.20-rc6 v2.6.20-rc4 v2.6.20-rc1 --
# v2.6.20-rc6 is bad
# v2.6.20-rc4 and v2.6.20-rc1 are good</pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_bisect_run">Bisect run</h3>
<div class="paragraph">
<p>If you have a script that can tell if the current source code is good
or bad, you can bisect by issuing the command:</p>
</div>
<div class="verseblock">
<pre class="content"><code>git</code> <code>bisect</code> <code>run</code> <em><cmd></em> [<em><arg></em>…​]</pre>
</div>
<div class="paragraph">
<p>Note that <em><cmd></em> run with <em><arg></em> should exit
with code 0 if the current source code is good/old, and exit with a
code between 1 and 127 (inclusive), except 125, if the current source
code is bad/new.</p>
</div>
<div class="paragraph">
<p>Any other exit code will abort the bisect process. It should be noted
that a program that terminates via <code>exit</code>(<code>-1</code>) leaves <code>$</code>? = 255, (see the
<code>exit</code>(3) manual page), as the value is chopped with & <code>0377</code>.</p>
</div>
<div class="paragraph">
<p>The special exit code 125 should be used when the current source code
cannot be tested. If the script exits with this code, the current
revision will be skipped (see <code>git</code> <code>bisect</code> <code>skip</code> above). 125 was chosen
as the highest sensible value to use for this purpose, because 126 and 127
are used by POSIX shells to signal specific error status (127 is for
command not found, 126 is for command found but not executable—​these
details do not matter, as they are normal errors in the script, as far as
<code>bisect</code> <code>run</code> is concerned).</p>
</div>
<div class="paragraph">
<p>You may often find that during a bisect session you want to have
temporary modifications (e.g. <code>s/</code>#define <code>DEBUG</code> <code>0/</code>#define <code>DEBUG</code> <code>1/</code> in a
header file, or "revision that does not have this commit needs this
patch applied to work around another problem this bisection is not
interested in") applied to the revision being tested.</p>
</div>
<div class="paragraph">
<p>To cope with such a situation, after the inner <code>git</code> <code>bisect</code> finds the
next revision to test, the script can apply the patch
before compiling, run the real test, and afterwards decide if the
revision (possibly with the needed patch) passed the test and then
rewind the tree to the pristine state. Finally the script should exit
with the status of the real test to let the <code>git</code> <code>bisect</code> <code>run</code> command loop
determine the eventual outcome of the bisect session.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1"><code>--no-checkout</code></dt>
<dd>
<p>Do not checkout the new working tree at each iteration of the bisection
process. Instead just update the reference named <code>BISECT_HEAD</code> to make
it point to the commit that should be tested.</p>
<div class="paragraph">
<p>This option may be useful when the test you would perform in each step
does not require a checked out tree.</p>
</div>
<div class="paragraph">
<p>If the repository is bare, <code>--no-checkout</code> is assumed.</p>
</div>
</dd>
<dt class="hdlist1"><code>--first-parent</code></dt>
<dd>
<p>Follow only the first parent commit upon seeing a merge commit.</p>
<div class="paragraph">
<p>In detecting regressions introduced through the merging of a branch, the merge
commit will be identified as introduction of the bug and its ancestors will be
ignored.</p>
</div>
<div class="paragraph">
<p>This option is particularly useful in avoiding false positives when a merged
branch contained broken or non-buildable commits, but the merge itself was OK.</p>
</div>
</dd>
<dt class="hdlist1"><code>--reset-when-found</code>[<code>=</code><em><where></em>]</dt>
<dd>
<p>Once the first bad commit is found, report it and clean up the
bisection state. <em><where></em> may be <code>original</code> to return to the commit
checked out before <code>git</code> <code>bisect</code> <code>start</code>, or <code>found</code> to leave the first
bad commit checked out. If <em><where></em> is omitted, it defaults to
<code>original</code>.</p>
<div class="paragraph">
<p>This option may be given to <code>git</code> <code>bisect</code> <code>start</code> or to <code>git</code> <code>bisect</code> <code>run</code>. It
cannot be used for a bisection started with <code>--no-checkout</code>.</p>
</div>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p>Automatically bisect a broken build between v1.2 and <code>HEAD</code>:</p>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start HEAD v1.2 -- # HEAD is bad, v1.2 is good
$ git bisect run make # "make" builds the app
$ git bisect reset # quit the bisect session</pre>
</div>
</div>
</li>
<li>
<p>Automatically bisect a test failure between origin and <code>HEAD</code>:</p>
<div class="listingblock">
<div class="content">
<pre>$ git bisect start HEAD origin -- # HEAD is bad, origin is good
$ git bisect run make test # "make test" builds and tests
$ git bisect reset # quit the bisect session</pre>
</div>
</div>
</li>
<li>
<p>Automatically bisect a broken test case:</p>
<div class="listingblock">
<div class="content">
<pre>$ cat ~/test.sh
#!/bin/sh
make || exit 125 # this skips broken builds
~/check_test_case.sh # does the test case pass?
$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10
$ git bisect run ~/test.sh
$ git bisect reset # quit the bisect session</pre>
</div>
</div>
<div class="paragraph">
<p>Here we use a <code>test.sh</code> custom script. In this script, if <code>make</code>
fails, we skip the current commit.
<code>check_test_case.sh</code> should <code>exit</code> <code>0</code> if the test case passes,
and <code>exit</code> <code>1</code> otherwise.</p>
</div>
<div class="paragraph">
<p>It is safer if both <code>test.sh</code> and <code>check_test_case.sh</code> are
outside the repository to prevent interactions between the bisect,
<code>make</code> and test processes and the scripts.</p>
</div>
</li>
<li>
<p>Automatically bisect with temporary modifications (hot-fix):</p>
<div class="listingblock">
<div class="content">
<pre>$ cat ~/test.sh
#!/bin/sh
# tweak the working tree by merging the hot-fix branch
# and then attempt a build
if git merge --no-commit --no-ff hot-fix &&
make