Dennis Sweeney <[email protected]> added the comment:
I reproduced as far back as Python 3.6 with this:
-----------------------------------
import gc
exc = Exception()
deltas = []
for i in range(2, 15):
ref1 = len(gc.get_objects())
for j in range(2**i):
try:
raise exc
except Exception:
pass
ref2 = len(gc.get_objects())
deltas.append(ref2 - ref1)
print(deltas)
# [4, 8, 16, 9, 64, 128, 256, 512, 1024, 2048, 4072, 8192, 16384]
-----------------------------------
Note that the memory does get freed up once the exception is deleted:
-----------------------------------
import gc
deltas = []
for i in range(2, 15):
ref1 = len(gc.get_objects())
exc = Exception()
for j in range(2**i):
try:
raise exc
except Exception:
pass
del exc # <<<<<<<<<<<<<<<<<<<<<<<<<<<
ref2 = len(gc.get_objects())
deltas.append(ref2 - ref1)
print(deltas)
# [0, 0, 0, 0, 0, -14, 0, 0, 0, 0, -14, 0, 0]
-----------------------------------
----------
nosy: +Dennis Sweeney, iritkatriel
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Python tracker <[email protected]>
<https://bugs.python.org/issue46717>
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