error[E0277]: can't compare `str` with `str` in const contexts
  --> $DIR/match-non-const-eq.rs:6:9
   |
LL |         "a" => (),
   |         ^^^ no implementation for `str == str`
   |
   = help: the trait `~const PartialEq` is not implemented for `str`
note: the trait `PartialEq` is implemented for `str`, but that implementation is not `const`
  --> $DIR/match-non-const-eq.rs:6:9
   |
LL |         "a" => (),
   |         ^^^

error[E0015]: cannot match on `str` in constant functions
  --> $DIR/match-non-const-eq.rs:6:9
   |
LL |         "a" => (),
   |         ^^^
   |
   = note: `str` cannot be compared in compile-time, and therefore cannot be used in `match`es
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0015, E0277.
For more information about an error, try `rustc --explain E0015`.