use Self
alias in self types rather than manually substituting it
#141289
+5
−5
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Of the rougly 145 uses of
self: Ty
in the standard library, 5 of them don't useSelf
but instead choose to manually "substitute" theimpl
's self type into the type.This leads to weird behavior sometimes (#140611 (comment)) -- to be clear, none of these usages actually trigger any bugs, but it's possible that they may break in the future (or at least lead to lints), so let's just "fix" them proactively.