memoryview('test') is causing a segfault

[tiran]

BPO	1777057
Nosy	@tiran

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

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GitHub fields:

assignee = None
closed_at = <Date 2008-01-06.22:29:46.713>
created_at = <Date 2007-08-19.01:13:40.000>
labels = ['interpreter-core', 'release-blocker']
title = "memoryview('test') is causing a segfault"
updated_at = <Date 2008-01-06.22:29:46.713>
user = 'https://github.com/tiran'

bugs.python.org fields:

activity = <Date 2008-01-06.22:29:46.713>
actor = 'admin'
assignee = 'nnorwitz'
closed = True
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2007-08-19.01:13:40.000>
creator = 'christian.heimes'
dependencies = []
files = []
hgrepos = []
issue_num = 1777057
keywords = []
message_count = 4.0
messages = ['32656', '32657', '32658', '32659']
nosy_count = 2.0
nosy_names = ['nnorwitz', 'christian.heimes']
pr_nums = []
priority = 'release blocker'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1777057'
versions = ['Python 3.0']

[tiran]

./python -c "memoryview('test')"
Segmentation fault

I compiled Python 3.0 with
$ ./configure --with-pydebug --enable-unicode=ucs4
and
$ make EXTRA_CFLAGS="-DPy_REF_DEBUG -DPy_TRACE_REFS -DPy_DEBUG"
after a make clean; rm -rf build; svn up

I've used gdb to trace the segfault:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210415424 (LWP 14436)]
0x080f77a0 in PyErr_SetObject (exception=0x81962c0, value=0xb7cee3a8) at Python/errors.c:55
55 if (exception != NULL &&

[nnorwitz]

Committed revision 57193. This problem was due to not initializing the new BufferError properly. Travis mentioned this in his post to python-3000.

[tiran]

I've found another bug:

$ ./python -c "memoryview('test')"
Fatal Python error: UNREF invalid object
Aborted

[nnorwitz]

Committed revision 57198 fixes the problem in debug mode. Now a proper exception is generated.