Bus error on 'except E as a.b:'

[gvanrossum]

BPO	40627
Nosy	@gvanrossum, @lysnikolaou, @pablogsal
PRs	bpo-40618: Disallow invalid targets in augassign and except clauses #20083
Superseder	bpo-40618: PEG Parser: Invalid targets for augassign and except succeed

^{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 2020-05-14.18:31:15.733>
created_at = <Date 2020-05-14.18:27:40.786>
labels = ['type-crash']
title = "Bus error on 'except E as a.b:'"
updated_at = <Date 2020-05-14.18:31:15.730>
user = 'https://github.com/gvanrossum'

bugs.python.org fields:

activity = <Date 2020-05-14.18:31:15.730>
actor = 'gvanrossum'
assignee = 'none'
closed = True
closed_date = <Date 2020-05-14.18:31:15.733>
closer = 'gvanrossum'
components = []
creation = <Date 2020-05-14.18:27:40.786>
creator = 'gvanrossum'
dependencies = []
files = []
hgrepos = []
issue_num = 40627
keywords = ['patch']
message_count = 3.0
messages = ['368860', '368861', '368862']
nosy_count = 3.0
nosy_names = ['gvanrossum', 'lys.nikolaou', 'pablogsal']
pr_nums = ['20083']
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '40618'
type = 'crash'
url = 'https://bugs.python.org/issue40627'
versions = []

[gvanrossum]

This seems due to some new check in pegen:

>>> try:
...   pass
... except E as a.b:
...   pass
... 
Bus error: 10

[gvanrossum]

Oh, looks like #20083 fixes it.

[gvanrossum]

Sorry!