New submission from Glin <g...@seznam.cz>: Situation: You have a while cycle. inside of it a try-except block and in this try-except block calling a function. Inside of this function raises an exception, with is caught in the try-except block.
What happens: Local variables of the function are not freed. (OK, they are freed when the program leaves a function inside of which is the while cycle, or when another exception raises and is caught, but it's not helpful when you have some server program based on infinite while loop or working with a large amount of data). Example: Example program is attached. Output of the example program: While start job() start Creating 1 Catched AttributeError While end While start job() start Creating 2 job() end Deleting 2 While end While start job() start Creating 3 job() end Deleting 3 While end ... As you can see, a variable 'a' created in the first call (which throws an exception) of the 'job' function will never get freed. Imagine that in 'job' function you create a large amount of data, or worse you create a database connection, which will be opened forever. Tested on Python 2.5.2 and 2.7(svn). On the contrary, Python 3.0 does not have this issue (it frees variables of the 'job' function at the end of except: block.) As Python 2.X will be another long time with us, I think it should be fixed to behave correctly (that is as in Python 3.) ---------- components: Interpreter Core files: notfreed.py messages: 84989 nosy: Glin severity: normal status: open title: Local variables not freed when Exception raises in function called from cycle type: resource usage versions: Python 2.4, Python 2.5, Python 2.6, Python 2.7 Added file: http://bugs.python.org/file13535/notfreed.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue5641> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
