1 files changed, 52 insertions, 0 deletions
diff --git a/Lib/test/test_sys_settrace.py b/Lib/test/test_sys_settrace.py
index 76d1aeecf6..4b3d096f16 100644
--- a/Lib/test/test_sys_settrace.py
+++ b/Lib/test/test_sys_settrace.py
@@ -607,6 +607,58 @@ class TraceTestCase(unittest.TestCase):
         self.compare_events(doit_async.__code__.co_firstlineno,
                             tracer.events, events)
 
+    def test_async_for_backwards_jump_has_no_line(self):
+        async def arange(n):
+            for i in range(n):
+                yield i
+        async def f():
+            async for i in arange(3):
+                if i > 100:
+                    break # should never be traced
+
+        tracer = self.make_tracer()
+        coro = f()
+        try:
+            sys.settrace(tracer.trace)
+            coro.send(None)
+        except Exception:
+            pass
+        finally:
+            sys.settrace(None)
+
+        events = [
+            (0, 'call'),
+            (1, 'line'),
+            (-3, 'call'),
+            (-2, 'line'),
+            (-1, 'line'),
+            (-1, 'return'),
+            (1, 'exception'),
+            (2, 'line'),
+            (1, 'line'),
+            (-1, 'call'),
+            (-2, 'line'),
+            (-1, 'line'),
+            (-1, 'return'),
+            (1, 'exception'),
+            (2, 'line'),
+            (1, 'line'),
+            (-1, 'call'),
+            (-2, 'line'),
+            (-1, 'line'),
+            (-1, 'return'),
+            (1, 'exception'),
+            (2, 'line'),
+            (1, 'line'),
+            (-1, 'call'),
+            (-2, 'line'),
+            (-2, 'return'),
+            (1, 'exception'),
+            (1, 'return'),
+        ]
+        self.compare_events(f.__code__.co_firstlineno,
+                            tracer.events, events)
+
     def test_21_repeated_pass(self):
         def func():
             pass