1 files changed, 0 insertions, 36 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-exists-forall-trait-contravariant.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-exists-forall-trait-contravariant.rs
deleted file mode 100644
index 921061916..000000000
--- a/src/test/ui/higher-rank-trait-bounds/hrtb-exists-forall-trait-contravariant.rs
+++ /dev/null
@@ -1,36 +0,0 @@
-// Test a case where variance and higher-ranked types interact in surprising ways.
-//
-// In particular, we test this pattern in trait solving, where it is not connected
-// to any part of the source code.
-
-trait Trait<T> {}
-
-fn foo<T>()
-where
-    T: Trait<for<'b> fn(&'b u32)>,
-{
-}
-
-impl<'a> Trait<fn(&'a u32)> for () {}
-
-fn main() {
-    // Here, proving that `(): Trait<for<'b> fn(&'b u32)>` uses the impl:
-    //
-    // - The impl provides the clause `forall<'a> { (): Trait<fn(&'a u32)> }`
-    // - We instantiate `'a` existentially to get `(): Trait<fn(&?a u32)>`
-    // - We unify `fn(&?a u32)` with `for<'b> fn(&'b u32)` -- this does a
-    //   "bidirectional" subtyping check, so we wind up with:
-    //   - `fn(&?a u32) <: for<'b> fn(&'b u32)` :-
-    //     - `&'!b u32 <: &?a u32`
-    //     - `!'b: ?a` -- solveable if `?a` is inferred to `'empty`
-    //   - `for<'b> fn(&'b u32) <: fn(&?a u32)` :-
-    //     - `&?a u32 u32 <: &?b u32`
-    //     - `?a: ?b` -- solveable if `?b` is also inferred to `'empty`
-    // - So the subtyping check succeeds, somewhat surprisingly.
-    //   This is because we can use `'empty`.
-    //
-    // NB. *However*, the reinstated leak-check gives an error here.
-
-    foo::<()>();
-    //~^ ERROR implementation of `Trait` is not general enough
-}