[issue25470] Random Malloc error raised

STINNER Victor added the comment: Python 3.6 got a builtin debugging tool to detect buffer under- and overflow: PYTHONMALLOC=debug https://docs.python.org/dev/whatsnew/3.6.html#pythonmalloc-environment-variable In most cases, an error in PyObject_Free() is a hint of a buffer overflow. So I

[issue25470] Random Malloc error raised

Martin Panter added the comment: Are you able to reproduce this easily? Perhaps a GDB backtrace might be useful, or posting instructions or code (simplified if possible) to reproduce it. I’m guessing the Valgrind errors may be caused by the same problem that causes the initial assertion

[issue25470] Random Malloc error raised

augustin rieunier added the comment: I should be able to reproduce it yes. Can't really give the code, as it's in a big program i'm working on, and it's never at the same place .. One thing though: it never happened on QA/UAT environments. So it might be linked to something (libs, programs) on

[issue25470] Random Malloc error raised

Changes by augustin rieunier : -- type: -> crash ___ Python tracker ___ ___

[issue25470] Random Malloc error raised

New submission from augustin rieunier: Hello there, I face random malloc error in my code. I recently added lots of json dumps/loads operation as I plugged my application with redis. Here's the error raised, and Valgrind information right after: 127.0.0.1 - - [24/Oct/2015 15:57:44] "DELETE