Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / src / test / ui / traits / issue-22110.rs

diff --git a/src/test/ui/traits/issue-22110.rs b/src/test/ui/traits/issue-22110.rs
new file mode 100644 (file)
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--- /dev/null
+++ b/src/test/ui/traits/issue-22110.rs
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+// run-pass
+// Test an issue where we reported ambiguity between the where-clause
+// and the blanket impl. The only important thing is that compilation
+// succeeds here. Issue #22110.
+
+// pretty-expanded FIXME #23616
+
+#![allow(dead_code)]
+
+trait Foo<A> {
+    fn foo(&self, a: A);
+}
+
+impl<A,F:Fn(A)> Foo<A> for F {
+    fn foo(&self, _: A) { }
+}
+
+fn baz<A,F:for<'a> Foo<(&'a A,)>>(_: F) { }
+
+fn components<T,A>(t: fn(&A))
+    where fn(&A) : for<'a> Foo<(&'a A,)>,
+{
+    baz(t)
+}
+
+fn main() {
+}