rust/compiler/rustc_borrowck
Aaron Hill e3a048c3c9
Ensure that early-bound function lifetimes are always 'local'
During borrowchecking, we treat any free (early-bound) regions on
the 'defining type' as `RegionClassification::External`. According
to the doc comments, we should only have 'external' regions when
checking a closure/generator.

However, a plain function can also have some if its regions
be considered 'early bound' - this occurs when the region is
constrained by an argument, appears in a `where` clause, or
in an opaque type. This was causing us to incorrectly mark these
regions as 'external', which caused some diagnostic code
to act as if we were referring to a 'parent' region from inside
a closure.

This PR marks all instantiated region variables as 'local'
when we're borrow-checking something other than a
closure/generator/inline-const.
2021-12-31 18:42:54 -05:00
..
src Ensure that early-bound function lifetimes are always 'local' 2021-12-31 18:42:54 -05:00
Cargo.toml Migrate to 2021 2021-09-20 22:21:42 -04:00