Use PredicateObligations instead of Predicates

Keep more information about trait binding failures.
2020-03-03 15:07:04 -08:00 · 2020-03-03 15:07:04 -08:00 · bd7ea5441e
commit bd7ea5441e
parent 485c5fb6e1
90 changed files with 280 additions and 141 deletions
--- a/src/test/ui/iterators/bound.stderr
+++ b/src/test/ui/iterators/bound.stderr
@ -2,7 +2,7 @@ error[E0277]: `u8` is not an iterator
  --> $DIR/bound.rs:2:10
   |
 LL | struct S<I: Iterator>(I);
-   | ------------------------- required by `S`
+   |        -    -------- required by this bound in `S`
 LL | struct T(S<u8>);
   |          ^^^^^ `u8` is not an iterator
   |