1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/nll/member-constraints/min-choice.rs b/tests/ui/nll/member-constraints/min-choice.rs
new file mode 100644
index 000000000..14b4dae7a
--- /dev/null
+++ b/tests/ui/nll/member-constraints/min-choice.rs
@@ -0,0 +1,34 @@
+// Assuming that the hidden type in these tests is `&'_#15r u8`,
+// we have a member constraint: `'_#15r member ['static, 'a, 'b, 'c]`.
+//
+// Make sure we pick up the minimum non-ambiguous region among them.
+// We will have to exclude `['b, 'c]` because they're incomparable,
+// and then we should pick `'a` because we know `'static: 'a`.
+
+// check-pass
+
+trait Cap<'a> {}
+impl<T> Cap<'_> for T {}
+
+fn type_test<'a, T: 'a>() -> &'a u8 { &0 }
+
+// Basic test: make sure we don't bail out because 'b and 'c are incomparable.
+fn basic<'a, 'b, 'c>() -> impl Cap<'a> + Cap<'b> + Cap<'c>
+where
+    'a: 'b,
+    'a: 'c,
+{
+    &0
+}
+
+// Make sure we don't pick `'static`.
+fn test_static<'a, 'b, 'c, T>() -> impl Cap<'a> + Cap<'b> + Cap<'c>
+where
+    'a: 'b,
+    'a: 'c,
+    T: 'a,
+{
+    type_test::<'_, T>() // This will fail if we pick 'static
+}
+
+fn main() {}