A possible crash in structseq.c's structseq_repr()

[ZackerySpytz]

BPO	36398
Nosy	@serhiy-storchaka, @ZackerySpytz, @iritkatriel
PRs	bpo-36398: Fix a possible crash in structseq_repr() #12492

^{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 2020-10-18.09:36:28.826>
created_at = <Date 2019-03-22.04:18:26.080>
labels = ['interpreter-core', '3.8', 'type-crash']
title = "A possible crash in structseq.c's structseq_repr()"
updated_at = <Date 2020-10-18.09:36:28.826>
user = 'https://github.com/ZackerySpytz'

bugs.python.org fields:

activity = <Date 2020-10-18.09:36:28.826>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2020-10-18.09:36:28.826>
closer = 'serhiy.storchaka'
components = ['Interpreter Core']
creation = <Date 2019-03-22.04:18:26.080>
creator = 'ZackerySpytz'
dependencies = []
files = []
hgrepos = []
issue_num = 36398
keywords = ['patch']
message_count = 3.0
messages = ['338584', '338586', '378768']
nosy_count = 3.0
nosy_names = ['serhiy.storchaka', 'ZackerySpytz', 'iritkatriel']
pr_nums = ['12492']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue36398'
versions = ['Python 3.8']

[ZackerySpytz]

If the first PyUnicode_DecodeUTF8() call fails in structseq_repr(), _PyUnicodeWriter_Dealloc() will be called on an uninitialized _PyUnicodeWriter.

[serhiy-storchaka]

New changeset 93e8012 by Serhiy Storchaka (Zackery Spytz) in branch 'master':
bpo-36398: Fix a possible crash in structseq_repr(). (GH-12492)
93e8012

[iritkatriel]

Can this be closed?