Josh Bressers <j...@bress.net> added the comment: You would be wise to avoid using heap storage once you're in the crash handler. From a security standpoint, if something has managed to damage the heap (which is not uncommon in a crash), you should not attempt to allocate or free heap memory. On modern glibc systems, this isn't much of a concern as there are various memory protection mechanisms that make heap exploitation very very hard (you're just going to end up crashing the crash handler). I'm not sure about other operating systems that python supports though.
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