[dinosath]

work based on #goals/reflection > new contributor @ 💬

Tracking issue #146922

r? @oli-obk

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[rust-log-analyzer]

The job test-x86_64-gnu-next-trait-solver-polonius failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[RUSTC-TIMING] build_script_build test:false 0.152
error[E0391]: cycle detected when evaluating type-level constant
    --> library/core/src/any.rs:731:34
     |
 731 |     pub(crate) data: [*const (); 16 / size_of::<*const ()>()],
     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: ...which requires const-evaluating + checking `any::TypeId::data::{constant#0}`...
note: ...which requires const-evaluating + checking `any::TypeId::data::{constant#0}`...
    --> library/core/src/mem/mod.rs:383:5
     |
 383 |     <T as SizedTypeProperties>::SIZE
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires simplifying constant for the type system `mem::SizedTypeProperties::SIZE`...
---
     = note: ...which requires const-evaluating + checking `mem::SizedTypeProperties::SIZE`...
note: ...which requires caching mir of `mem::type_info::size_of` for CTFE...
    --> library/core/src/mem/type_info.rs:74:1
     |
  74 | pub(crate) fn size_of<T: Sized>() -> usize {
     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     = note: ...which requires elaborating drops for `mem::type_info::size_of`...
     = note: ...which requires borrow-checking `mem::type_info::size_of`...
     = note: ...which requires promoting constants in MIR for `mem::type_info::size_of`...
     = note: ...which requires const checking `mem::type_info::size_of`...
     = note: ...which requires building MIR for `mem::type_info::size_of`...
     = note: ...which requires match-checking `mem::type_info::size_of`...
     = note: ...which requires type-checking `mem::type_info::size_of`...
note: ...which requires computing autoderef types for `[*const (); 16 / size_of::<*const ()>()]`...
    --> library/core/src/any.rs:731:34
     |
 731 |     pub(crate) data: [*const (); 16 / size_of::<*const ()>()],
     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     = note: ...which again requires evaluating type-level constant, completing the cycle
     = note: cycle used when coherence checking all impls of trait `marker::Copy`
     = note: for more information, see <https://rustc-dev-guide.rust-lang.org/overview.html#queries> and <https://rustc-dev-guide.rust-lang.org/query.html>

For more information about this error, try `rustc --explain E0391`.
[RUSTC-TIMING] core test:false 5.323
error: could not compile `core` (lib) due to 1 previous error
Bootstrap failed while executing `build library --stage 2`

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[rust-bors]

☔ The latest upstream changes (presumably #165563) made this pull request unmergeable. Please resolve the merge conflicts by rebasing.