Merging upstream version 1.66.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/test/ui/inference/issue-36053.rs b/src/test/ui/inference/issue-36053.rs
new file mode 100644
index 000000000..5c6d07804
--- /dev/null
+++ b/src/test/ui/inference/issue-36053.rs
@@ -0,0 +1,22 @@
+// run-pass
+// Regression test for #36053. ICE was caused due to obligations being
+// added to a special, dedicated fulfillment cx during a
+// probe. Problem seems to be related to the particular definition of
+// `FusedIterator` in std but I was not able to isolate that into an
+// external crate.
+
+use std::iter::FusedIterator;
+
+struct Thing<'a>(#[allow(unused_tuple_struct_fields)] &'a str);
+impl<'a> Iterator for Thing<'a> {
+    type Item = &'a str;
+    fn next(&mut self) -> Option<&'a str> {
+        None
+    }
+}
+
+impl<'a> FusedIterator for Thing<'a> {}
+
+fn main() {
+    Thing("test").fuse().filter(|_| true).count();
+}