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Add test showing issue with child in tty lock when cancelled

bug_in_debug
Tyler Goodlet 2020-10-06 22:39:20 -04:00
parent 07112089d0
commit acb4cb0b2b
2 changed files with 61 additions and 0 deletions

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@ -0,0 +1,48 @@
import tractor
async def name_error():
"Raise a ``NameError``"
getattr(doggypants)
async def spawn_until(depth=0):
""""A nested nursery that triggers another ``NameError``.
"""
async with tractor.open_nursery() as n:
if depth < 1:
# await n.run_in_actor('breakpoint_forever', breakpoint_forever)
await n.run_in_actor('name_error', name_error)
else:
depth -= 1
await n.run_in_actor(f'spawn_until_{depth}', spawn_until, depth=depth)
async def main():
"""The main ``tractor`` routine.
The process tree should look as approximately as follows when the debugger
first engages:
python examples/debugging/multi_nested_subactors_bp_forever.py
python -m tractor._child --uid ('spawner1', '7eab8462 ...)
python -m tractor._child --uid ('spawn_until_0', '3720602b ...)
python -m tractor._child --uid ('name_error', '505bf71d ...)
python -m tractor._child --uid ('spawner0', '1d42012b ...)
python -m tractor._child --uid ('name_error', '6c2733b8 ...)
"""
async with tractor.open_nursery() as n:
# spawn both actors
portal = await n.run_in_actor('spawner0', spawn_until, depth=0)
portal1 = await n.run_in_actor('spawner1', spawn_until, depth=1)
# nursery cancellation should be triggered due to propagated error
await portal.result()
await portal1.result()
if __name__ == '__main__':
tractor.run(main, debug_mode=True, loglevel='warning')

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@ -331,3 +331,16 @@ def test_multi_nested_subactors_error_through_nurseries(spawn):
before = str(child.before.decode())
assert "NameError" in before
def test_root_nursery_cancels_before_child_releases_tty_lock(spawn):
"""Exemplifies a bug where the root sends a cancel message before a nested child
which has the tty lock (and is in pdb) doesn't cancel after exiting the debugger.
"""
child = spawn('root_cancelled_but_child_is_in_tty_lock')
for _ in range(5):
child.expect(r"\(Pdb\+\+\)")
child.sendline('c')
# child.expect(pexpect.EOF)