1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.stderr b/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.stderr
new file mode 100644
index 000000000..cc1560162
--- /dev/null
+++ b/src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.stderr
@@ -0,0 +1,36 @@
+error: lifetime may not live long enough
+  --> $DIR/project-fn-ret-invariant.rs:40:13
+   |
+LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
+   |        --  -- lifetime `'b` defined here
+   |        |
+   |        lifetime `'a` defined here
+LL |     let f = foo; // <-- No consistent type can be inferred for `f` here.
+LL |     let a = bar(f, x);
+   |             ^^^^^^^^^ argument requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+   = note: requirement occurs because of the type `Type<'_>`, which makes the generic argument `'_` invariant
+   = note: the struct `Type<'a>` is invariant over the parameter `'a`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: lifetime may not live long enough
+  --> $DIR/project-fn-ret-invariant.rs:40:13
+   |
+LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
+   |        --  -- lifetime `'b` defined here
+   |        |
+   |        lifetime `'a` defined here
+LL |     let f = foo; // <-- No consistent type can be inferred for `f` here.
+LL |     let a = bar(f, x);
+   |             ^^^^^^^^^ argument requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `'a`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+help: `'a` and `'b` must be the same: replace one with the other
+
+error: aborting due to 2 previous errors
+