Lambda with complex arguments is ctx STORE

[malthe]

BPO	29477
Nosy	@bitdancer, @malthe

^{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 2019-08-31.11:24:28.577>
created_at = <Date 2017-02-08.09:30:21.232>
labels = ['interpreter-core', 'build']
title = 'Lambda with complex arguments is ctx STORE'
updated_at = <Date 2019-08-31.11:24:28.576>
user = 'https://github.com/malthe'

bugs.python.org fields:

activity = <Date 2019-08-31.11:24:28.576>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2019-08-31.11:24:28.577>
closer = 'serhiy.storchaka'
components = ['Interpreter Core']
creation = <Date 2017-02-08.09:30:21.232>
creator = 'malthe'
dependencies = []
files = []
hgrepos = []
issue_num = 29477
keywords = []
message_count = 2.0
messages = ['287291', '287309']
nosy_count = 2.0
nosy_names = ['r.david.murray', 'malthe']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue29477'
versions = ['Python 2.7']

[malthe]

Normally, lambda arguments (positional or keyword-based) are ctx PARAM, since they're parameters.

But complex (packed) arguments are ctx STORE.

This is a problem for AST transformation tools that can't reliably detect the name context.

[bitdancer]

I presume this is a 2.7 only issue. I'm pretty sure the 2.7 AST isn't going to get changed in 2.7 at this point.