1 files changed, 23 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-59494.rs b/tests/ui/issues/issue-59494.rs
new file mode 100644
index 00000000000..a53e28f7246
--- /dev/null
+++ b/tests/ui/issues/issue-59494.rs
@@ -0,0 +1,23 @@
+fn t7p<A, B, C>(f: impl Fn(B) -> C, g: impl Fn(A) -> B) -> impl Fn(A) -> C {
+    move |a: A| -> C { f(g(a)) }
+}
+
+fn t8n<A, B, C>(f: impl Fn(A) -> B, g: impl Fn(A) -> C) -> impl Fn(A) -> (B, C)
+where
+    A: Copy,
+{
+    move |a: A| -> (B, C) {
+        let b = a;
+        let fa = f(a);
+        let ga = g(b);
+        (fa, ga)
+    }
+}
+
+fn main() {
+    let f = |(_, _)| {};
+    let g = |(a, _)| a;
+    let t7 = |env| |a| |b| t7p(f, g)(((env, a), b));
+    let t8 = t8n(t7, t7p(f, g));
+    //~^ ERROR: expected a `Fn<(_,)>` closure, found `impl Fn(((_, _), _))` [E0277]
+}