1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/derived-errors/issue-30580.rs b/src/test/ui/derived-errors/issue-30580.rs
new file mode 100644
index 000000000..6940fcf7c
--- /dev/null
+++ b/src/test/ui/derived-errors/issue-30580.rs
@@ -0,0 +1,17 @@
+// Test that we do not see uninformative region-related errors
+// when we get some basic type-checking failure. See #30580.
+
+pub struct Foo { a: u32 }
+pub struct Pass<'a, 'tcx: 'a>(&'a mut &'a (), &'a &'tcx ());
+
+impl<'a, 'tcx> Pass<'a, 'tcx>
+{
+    pub fn tcx(&self) -> &'a &'tcx () { self.1 }
+    fn lol(&mut self, b: &Foo)
+    {
+        b.c; //~ ERROR no field `c` on type `&Foo`
+        self.tcx();
+    }
+}
+
+fn main() {}