What causes a Python segmentation fault?

This happens when a python extension (written in C) tries to access a memory beyond reach.

You can trace it in following ways.

  • Add sys.settrace at the very first line of the code.
  • Use gdb as described by Mark in this answer.. At the command promptgdb python (gdb) run /path/to/script.py ## wait for segfault ## (gdb) backtrace ## stack trace of the c code

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