1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-59494.stderr b/src/test/ui/issues/issue-59494.stderr
new file mode 100644
index 000000000..a9284535e
--- /dev/null
+++ b/src/test/ui/issues/issue-59494.stderr
@@ -0,0 +1,18 @@
+error[E0277]: expected a `Fn<(_,)>` closure, found `impl Fn(((_, _), _))`
+  --> $DIR/issue-59494.rs:21:22
+   |
+LL |     let t8 = t8n(t7, t7p(f, g));
+   |              ---     ^^^^^^^^^ expected an `Fn<(_,)>` closure, found `impl Fn(((_, _), _))`
+   |              |
+   |              required by a bound introduced by this call
+   |
+   = help: the trait `Fn<(_,)>` is not implemented for `impl Fn(((_, _), _))`
+note: required by a bound in `t8n`
+  --> $DIR/issue-59494.rs:5:45
+   |
+LL | fn t8n<A, B, C>(f: impl Fn(A) -> B, g: impl Fn(A) -> C) -> impl Fn(A) -> (B, C)
+   |                                             ^^^^^^^^^^ required by this bound in `t8n`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.