--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/local-var-4.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,75 @@
+//  { dg-do run }
+
+// Test modifying a local var across nested scopes containing vars
+// hiding those at outer scopes.
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-ret-int-yield-int.h"
+
+struct coro1
+f (int start) noexcept
+{
+  int value = start;
+  {
+    int value = start + 5;
+    {
+	int value = start + 20;
+    }
+    {
+	int value = start + 1;
+	PRINT ("f: about to yield start");
+	co_yield value;
+    }
+  }
+
+  value -= 31;
+  PRINT ("f: about to yield (value-31)");
+  co_yield value;
+
+  value += 6163;
+  PRINT ("f: about to return (value+6163)");
+  co_return value;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  struct coro1 x = f (42);
+  PRINT ("main: got coro1 - resuming (1)");
+  if (x.handle.done())
+    abort();
+  x.handle.resume();
+  PRINT ("main: after resume (1)");
+  int y = x.handle.promise().get_value();
+  if ( y != 43 )
+    abort ();
+  PRINT ("main: apparently got 42 - resuming (2)");
+  if (x.handle.done())
+    abort();
+  x.handle.resume();
+  PRINT ("main: after resume (2)");
+  y = x.handle.promise().get_value();
+  if ( y != 11 )
+    abort ();
+  PRINT ("main: apparently got 11 - resuming (3)");
+  if (x.handle.done())
+    {
+   PRINT ("main: done?");
+   abort();
+    }
+  x.handle.resume();
+  PRINT ("main: after resume (2) checking return");
+  y = x.handle.promise().get_value();
+  if ( y != 6174 )
+    abort ();
+  PRINT ("main: apparently got 6174");
+  if (!x.handle.done())
+    {
+      PRINT ("main: apparently not done...");
+      abort ();
+    }
+  PRINT ("main: returning");
+  return 0;
+}