Parser: broken line numbers for triple-quoted strings

[skrah]

BPO	24623
Nosy	@vstinner, @benjaminp, @skrah, @serhiy-storchaka
Superseder	bpo-16806: col_offset is -1 and lineno is wrong for multiline string expressions

^{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 2015-11-16.15:24:15.843>
created_at = <Date 2015-07-12.19:41:18.818>
labels = []
title = 'Parser: broken line numbers for triple-quoted strings'
updated_at = <Date 2015-11-16.15:24:15.841>
user = 'https://github.com/skrah'

bugs.python.org fields:

activity = <Date 2015-11-16.15:24:15.841>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2015-11-16.15:24:15.843>
closer = 'serhiy.storchaka'
components = []
creation = <Date 2015-07-12.19:41:18.818>
creator = 'skrah'
dependencies = []
files = []
hgrepos = []
issue_num = 24623
keywords = []
message_count = 3.0
messages = ['246665', '254116', '254738']
nosy_count = 4.0
nosy_names = ['vstinner', 'benjamin.peterson', 'skrah', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '16806'
type = None
url = 'https://bugs.python.org/issue24623'
versions = []

[skrah]

IMO the string should start at lineno=1, col_offset=0.

$ ./python 
Python 3.6.0a0 (default:02b81a82a57d, Jul 12 2015, 20:33:44) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ast
>>> a = ast.parse('''"""xxx
... yyy
... zzz"""''')
>>> ast.dump(a, include_attributes=True)
"Module(body=[Expr(value=Str(s='xxx\\nyyy\\nzzz', lineno=3, col_offset=-1), lineno=3, col_offset=-1)])"

[skrah]

Victor, I'm adding you just in case this also affects your
optimizer (like bpo-25555).

[serhiy-storchaka]

This is a duplicate of bpo-16806