fix coerce unsized impl restriction #1935
Open
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
fixes #1574
Unsure whether we want to document them even though
CoerceUnsized
is unstable. Sourcehttps://github.com/rust-lang/rust/blob/f8f6997469237299c1d60814c7b9828602a1f8e4/compiler/rustc_hir_analysis/src/coherence/builtin.rs#L430-L547