[Python-Dev] Core dump in garbage collection: _PyGC_Insert???

[Mark Favas]

No problems (apart from the usual test failures) with the CVS from 10
July, but with CVS from 11 July I get core dumps at random points in
"make test" which seem to point to a problem with the GC code. Sample
dbx output:

(Platform is DEC (Compaq) Alpha,
Compaq C T6.3-125 (dtk) on Digital UNIX V4.0F  (Rev. 1229))

dbx version 3.11.10
Type 'help' for help.
Core file created by program "python"

thread 0xb signal Segmentation fault at >*[__nxm_thread_kill,
0x3ff805c7ca8]   ret      r31, (r26), 1
(dbx) where
>  0 __nxm_thread_kill(0x3ffc01b3c10, 0x1200f47dc, 0x0, 0x11fffeed0, 0x3ff8059c724) [0x3ff805c7ca8]
   1 pthread_kill(0x1200ea970, 0x1, 0x0, 0x11fffeee0, 0x3ffc01b36c0)
[0x3ff805ad6f4]
   2 (unknown)() [0x3ff8059712c]
   3 (unknown)() [0x3ff807e370c]
   4 exc_unwind(0x11fffaf28, 0xabadabad00beed00, 0x3ff80592b90,
0x11fffb1c8, 0x3ff807e3acc) [0x3ff807e380c]
   5 exc_raise_signal_exception(0x86, 0x0, 0x120159490, 0x1, 0x1)
[0x3ff807e3ac8]
   6 (unknown)() [0x3ff805af254]
   7 (unknown)() [0x12015948c]
   8 (unknown)() [0x12014f36c]
   9 (unknown)() [0x120159844]
  10 _PyGC_Insert(0x7f, 0x6f, 0x120111690, 0x2, 0x140155e20)
[0x120159d04]

This _PyGC_Insert always appears here in the trace - sometimes called
from PyTuple_New, sometimes from PyMethod_New...

-- 
Email  - m.favas@per.dem.csiro.au        Mark C Favas
Phone  - +61 8 9333 6268, 0418 926 074   CSIRO Exploration & Mining
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