SharedMemory leak

[Sinacam]

Profiling any program with multiprocessing.shared_memory.SharedMemory results in

/usr/lib/python3.9/multiprocessing/resource_tracker.py:96: UserWarning: resource_tracker: process died unexpectedly, relaunching.  Some resources might leak.         
  warnings.warn('resource_tracker: process died unexpectedly, '

To Reproduce The following snippet produces the behaviour (with scalene snippet.py)

from multiprocessing.shared_memory import SharedMemory
import time

try:
    size = 2**20
    shm = SharedMemory(create=True, size=size*8)
    time.sleep(5)
finally:
    shm.close()
    shm.unlink()

In the actual application, shm gets unassigned and results in an error somewhere down the line. But I don't quite know how to reproduce this.

UnboundLocalError: local variable 'shm' referenced before assignment

Environment:

• OS: Linux 5.10.13-arch1-1
• scalene==1.3.8
• Python 3.9.5