Merging upstream version 1.69.0+dfsg1.

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

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/ui/higher-rank-trait-bounds/issue-39292.rs b/tests/ui/higher-rank-trait-bounds/issue-39292.rs
new file mode 100644
index 000000000..968cf0891
--- /dev/null
+++ b/tests/ui/higher-rank-trait-bounds/issue-39292.rs
@@ -0,0 +1,17 @@
+// run-pass
+// Regression test for issue #39292. The object vtable was being
+// incorrectly left with a null pointer.
+
+trait Foo<T> {
+    fn print<'a>(&'a self) where T: 'a { println!("foo"); }
+}
+
+impl<'a> Foo<&'a ()> for () { }
+
+trait Bar: for<'a> Foo<&'a ()> { }
+
+impl Bar for () {}
+
+fn main() {
+    (&() as &dyn Bar).print(); // Segfault
+}