Crash on gevent: AttributeError: type object 'Thread' has no attribute '_name'

[ouazizmed]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I’m hitting a crash when using Memray with gevent.

Memray correctly writes the profile .bin file, but then crashes during shutdown in
Tracker.__exit__ with an AttributeError on threading.Thread._name.

/tmp/gevent_memray > python -m memray run test_memray_gevent.py                                                                                                                                                                  py gevent_memray 08:55:33 PM
Writing profile results into memray-test_memray_gevent.py.917120.bin
⚠ Memray support for Greenlet is experimental ⚠
Please report any issues at https://github.com/bloomberg/memray/issues


[memray] Successfully generated profile results.

You can now generate reports from the stored allocation records.
Some example commands to generate reports:

/tmp/gevent_memray/.venv/bin/python -m memray flamegraph memray-test_memray_gevent.py.917120.bin
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/tmp/gevent_memray/.venv/lib/python3.13/site-packages/memray/__main__.py", line 6, in <module>
    sys.exit(main())
             ~~~~^^
  File "/tmp/gevent_memray/.venv/lib/python3.13/site-packages/memray/commands/__init__.py", line 138, in main
    arg_values.entrypoint(arg_values, parser)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
  File "/tmp/gevent_memray/.venv/lib/python3.13/site-packages/memray/commands/run.py", line 338, in run
    _run_with_file_output(args)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/tmp/gevent_memray/.venv/lib/python3.13/site-packages/memray/commands/run.py", line 187, in _run_with_file_output
    _run_tracker(
    ~~~~~~~~~~~~^
        destination=destination,
        ^^^^^^^^^^^^^^^^^^^^^^^^
        args=args,
        ^^^^^^^^^^
        post_run_message=example_report_generation_message,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/tmp/gevent_memray/.venv/lib/python3.13/site-packages/memray/commands/run.py", line 56, in _run_tracker
    with tracker:
         ^^^^^^^
  File "src/memray/_memray.pyx", line 861, in memray._memray.Tracker.__exit__
  File "src/memray/_memray.pyx", line 867, in memray._memray.Tracker.__exit__
AttributeError: type object 'Thread' has no attribute '_name'. Did you mean: 'name'?

Expected Behavior

No response

Steps To Reproduce

Code used

import gevent
from gevent import monkey

monkey.patch_all()

def worker():
    data = b"x" * 1024
    gevent.sleep(0.01)
    return data

def main():
    jobs = [gevent.spawn(worker) for _ in range(5)]
    gevent.joinall(jobs)

if __name__ == "__main__":
    main()

Command used:

python -m memray run test_memray_gevent.py

Memray Version

1.19.1

Python Version

3.13

Operating System

Linux

Anything else?

No response