1 files changed, 26 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-35139.rs b/tests/ui/issues/issue-35139.rs
new file mode 100644
index 000000000..e462f3543
--- /dev/null
+++ b/tests/ui/issues/issue-35139.rs
@@ -0,0 +1,26 @@
+use std::fmt;
+
+pub trait MethodType {
+    type GetProp: ?Sized;
+}
+
+pub struct MTFn;
+
+impl<'a> MethodType for MTFn { //~ ERROR E0207
+    type GetProp = dyn fmt::Debug + 'a;
+}
+
+fn bad(a: Box<<MTFn as MethodType>::GetProp>) -> Box<dyn fmt::Debug+'static> {
+    a
+}
+
+fn dangling(a: &str) -> Box<dyn fmt::Debug> {
+    bad(Box::new(a))
+}
+
+fn main() {
+    let mut s = "hello".to_string();
+    let x = dangling(&s);
+    s = String::new();
+    println!("{:?}", x);
+}