Aaron Hill e4e9bb4a24
Don't fire CONST_ITEM_MUTATION lint when borrowing a deref
Fixes #78819

This extends the check for dereferences added in PR #77324
to cover mutable borrows, as well as direct writes. If we're operating
on a dereference of a `const` item, we shouldn't be firing the lint.
2020-11-07 20:11:53 -05:00
..