[Python-Dev] ref leak w/except hooks
Brett Cannon
brett at python.org
Thu Mar 2 19:09:28 CET 2006
On 3/2/06, Neal Norwitz <nnorwitz at gmail.com> wrote:
> The following code leaks a reference. Original test case from
> Lib/test/test_sys.py in test_original_excepthook.
>
> import sys, StringIO
> eh = sys.__excepthook__
> try:
> raise ValueError(42)
> except ValueError, exc:
> exc_type, exc_value, exc_tb = sys.exc_info()
> eh(exc_type, None, None)
Which can be simplified to::
from sys import __excepthook__ as eh
try:
raise BaseException
except:
eh(BaseException, None, None)
It fails if the first argument to sys.__excepthook__ is either a
built-in exception or a classic class. it looks like strings and
new-style classes do not trigger it.
-Brett
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