1 files changed, 5 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-43692.rs b/tests/ui/issues/issue-43692.rs
new file mode 100644
index 00000000000..a9999c22651
--- /dev/null
+++ b/tests/ui/issues/issue-43692.rs
@@ -0,0 +1,5 @@
+// run-pass
+fn main() {
+    assert_eq!('\u{10__FFFF}', '\u{10FFFF}');
+    assert_eq!("\u{10_F0FF__}foo\u{1_0_0_0__}", "\u{10F0FF}foo\u{1000}");
+}