Avoid ICE in rustdoc.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/rustdoc/fn-bound.rs b/src/test/rustdoc/fn-bound.rs
new file mode 100644
index 00000000000..7b44ee7b4b5
--- /dev/null
+++ b/src/test/rustdoc/fn-bound.rs
@@ -0,0 +1,17 @@
+use std::iter::Peekable;
+
+pub struct Span<F: Fn(&i32)> {
+    inner: Peekable<ConditionalIterator<F>>,
+}
+
+struct ConditionalIterator<F> {
+    f: F,
+}
+
+impl<F: Fn(&i32)> Iterator for ConditionalIterator<F> {
+    type Item = ();
+
+    fn next(&mut self) -> Option<Self::Item> {
+        todo!()
+    }
+}