1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/borrowck/issue-28934.rs b/tests/ui/borrowck/issue-28934.rs
new file mode 100644
index 000000000..1e48878f6
--- /dev/null
+++ b/tests/ui/borrowck/issue-28934.rs
@@ -0,0 +1,25 @@
+// Regression test: issue had to do with "givens" in region inference,
+// which were not being considered during the contraction phase.
+
+// run-fail
+// error-pattern:explicit panic
+// ignore-emscripten no processes
+
+struct Parser<'i: 't, 't>(&'i u8, &'t u8);
+
+impl<'i, 't> Parser<'i, 't> {
+    fn parse_nested_block<F, T>(&mut self, parse: F) -> Result<T, ()>
+        where for<'tt> F: FnOnce(&mut Parser<'i, 'tt>) -> T
+    {
+        panic!()
+    }
+
+    fn expect_exhausted(&mut self) -> Result<(), ()> {
+        Ok(())
+    }
+}
+
+fn main() {
+    let x = 0u8;
+    Parser(&x, &x).parse_nested_block(|input| input.expect_exhausted()).unwrap();
+}