[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[STINNER Victor]

Change by STINNER Victor :


--
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is 
too small

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[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan  added the comment:

Sorry, it occurs in Travis too randomly not consistently.

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[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan  added the comment:

Duplicate of issue35961 ? It occurs in Travis too

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nosy: +xtreak

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[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[STINNER Victor]

STINNER Victor  added the comment:

I'm unable to reproduce the issue on my Fedora 29 (x86-64) laptop. I used two 
terminals:

* ./python -m test -F -j0 test_slice test_slice test_slice test_slice 
test_slice test_slice test_slice test_slice
* ./python -m test -j0 -u all,-gui -r # stress the system to randomize timings 
in test_slice

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[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[STINNER Victor]

New submission from STINNER Victor :

s390x Debian 3.x:
https://buildbot.python.org/all/#/builders/13/builds/2344

0:06:26 load avg: 0.92 [291/420/1] test_slice crashed (Exit code -6)
Modules/gcmodule.c:110: gc_decref: Assertion "gc_get_refs(g) > 0" failed: 
refcount is too small
Enable tracemalloc to get the memory block allocation traceback

object  : .BadCmp object at 
0x3ff93967e90>
type: BadCmp
refcount: 1
address : 0x3ff93967e90
Fatal Python error: _PyObject_AssertFailed

Current thread 0x03ff95272700 (most recent call first):
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_slice.py",
 line 107 in 
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/unittest/case.py", 
line 197 in handle
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/unittest/case.py", 
line 782 in assertRaises
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_slice.py",
 line 107 in test_cmp
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/unittest/case.py", 
line 642 in run
  File 
"/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/unittest/case.py", 
line 702 in __call__
  ...

--
components: Interpreter Core
messages: 335320
nosy: pablogsal, vstinner
priority: normal
severity: normal
status: open
title: test_slice crashed on s390x Debian 3.x: gc_decref: Assertion 
"gc_get_refs(g) > 0" failed: refcount is too small
versions: Python 3.8

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[issue35977] test_slice crashed on s390x Debian 3.x: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small

[STINNER Victor]

STINNER Victor  added the comment:

When the test has been ran one more time in verbose mode, it passed.

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