segfault in test_json on AMD64 FreeBSD 8.2 2.7

[vstinner]

BPO	12980
Nosy	@vstinner, @ezio-melotti, @skrah

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

Show more details

GitHub fields:

assignee = None
closed_at = <Date 2011-09-14.22:04:32.638>
created_at = <Date 2011-09-14.19:36:33.134>
labels = ['library', 'type-crash']
title = 'segfault in test_json on AMD64 FreeBSD 8.2 2.7'
updated_at = <Date 2011-09-14.22:04:32.637>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2011-09-14.22:04:32.637>
actor = 'skrah'
assignee = 'none'
closed = True
closed_date = <Date 2011-09-14.22:04:32.638>
closer = 'skrah'
components = ['Library (Lib)']
creation = <Date 2011-09-14.19:36:33.134>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 12980
keywords = []
message_count = 3.0
messages = ['144045', '144054', '144057']
nosy_count = 3.0
nosy_names = ['vstinner', 'ezio.melotti', 'skrah']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue12980'
versions = ['Python 2.7']

[vstinner]

http://www.python.org/dev/buildbot/all/builders/AMD64%20FreeBSD%208.2%202.7/builds/301

---------------------------------------------
[ 44/359] test_json
Fatal Python error: Segmentation fault

Current thread 0x00000008010041c0:
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 420 in _iterencode
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 309 in _iterencode_list
File "/usr/home/buildbot/buildarea/2.7.krah-freebsd/build/Lib/json/encoder.py", line 408 in _iterencode
...
*** Signal 11
---------------------------------------------

Can it be an unlimited loop (recursive loop)? It looks like a stack overflow.

[vstinner]

I ran test_json (and then the full test suite using make buildbottest) on FreeBSD 8.2, with Python compiled by clang 2.8, and I'm unable to reproduce the bug.

@skrah: Feel free to close the issue if we cannot reproduce it outside your buildbot :-)

[skrah]

I'm completely puzzled by this. I ran *all* tests manually on the same
machine with clang with the same parameters as the buildbot
(--with-pydebug, make buildbottest) and they pass.

I reverted the buildbot to gcc, it'll be green again soon.

Closing, since it can't be reproduced.