From c4a1850159f28ff46e377869ce4503d0d4e45c5d Mon Sep 17 00:00:00 2001
From: Luca Ciucci <luca.ciucci@bugseng.com>
Date: Thu, 15 Oct 2026 10:09:00 +0200
Subject: [PATCH] Preserve trailing newlines in quoted scalars

Quoted scalars used CLIP chomping after flow folding, which truncated
multiple trailing newlines to one. Chomping applies to block scalars;
quoted scalars must retain the newlines produced by folding.
---
 src/scantoken.cpp                   |  2 +-
 test/integration/load_node_test.cpp | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/scantoken.cpp b/src/scantoken.cpp
index b13d21133..dec824d89 100644
--- a/src/scantoken.cpp
+++ b/src/scantoken.cpp
@@ -349,7 +349,7 @@ void Scanner::ScanQuotedScalar() {
   params.fold = FOLD_FLOW;
   params.eatLeadingWhitespace = true;
   params.trimTrailingSpaces = false;
-  params.chomp = CLIP;
+  params.chomp = KEEP;
   params.onDocIndicator = THROW;
 
   // insert a potential simple key
diff --git a/test/integration/load_node_test.cpp b/test/integration/load_node_test.cpp
index e5f52bea6..dfd91739f 100644
--- a/test/integration/load_node_test.cpp
+++ b/test/integration/load_node_test.cpp
@@ -540,5 +540,26 @@ TEST(LoadNodeTest, NonUniqueMapKey) {
   EXPECT_THROW(Load("{a: A, b: B, a: A}"), NonUniqueMapKey);
 }
 
+TEST(LoadNodeTest, PreserveTrailingNewlinesInQuotedScalars) {
+  for (char quote : {'\'', '"'}) {
+    for (std::size_t trailing = 0; trailing <= 4; ++trailing) {
+      SCOPED_TRACE(::testing::Message()
+                   << "quote=" << quote << ", trailing=" << trailing);
+      std::string input = "value: ";
+      input += quote;
+      input += "a\n\n  b";
+      if (trailing > 0) {
+        input += std::string(trailing + 1, '\n');
+        input += "  ";
+      }
+      input += quote;
+      input += '\n';
+
+      EXPECT_EQ("a\nb" + std::string(trailing, '\n'),
+                Load(input)["value"].as<std::string>());
+    }
+  }
+}
+
 }  // namespace
 }  // namespace YAML