[Python-Dev] Doubly linked lists in Python core? (original) (raw)

Skip Montanaro skip at pobox.com
Tue Jun 11 21:10:41 CEST 2013

I encountered this disconcerting message yesterday on a Linux system running Python 2.7.2:

*** glibc detected *** /opt/local/bin/python: corrupted double-linked list: 0x0000000003b01c90 ***

Of course, no core file or other information about where the problem occurred was left behind, just the raw pointer value. Running under valgrind didn't report anything obvious, at least nothing different than a run with slightly different command line parameters which didn't elicit the message.

I suspect the problem actually lies in one of our C++ libraries here at work, but before I attempt any debugging gymnastics (ow! my back hurts) I thought I would check to see if Python makes much use of double linked lists in a non-debug build. I don't recall a lot from days of yore, perhaps some in the dict implementation?

Thanks,

Skip

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