regression: array methods unstable feature use #78140
Labels
P-high
High priority
regression-from-stable-to-beta
Performance or correctness regression from stable to beta.
T-compiler
Relevant to the compiler team, which will review and decide on the PR/issue.
T-libs-api
Relevant to the library API team, which will review and decide on the PR/issue.
Milestone
Several crates are erroring on as_slice/as_mut_slice being added to the array types (unstably).
I suspect this is because method resolution is now seeing the method on arrays, whereas previously we derefed to
&mut [T]
and then there was a trait impl on that? There was another similar issue recently, but I forget what the resolution there was.cc #76118
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