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bpo-39474: Fix AST pos for expressions like (a)(b), (a)[b] and (a).b.#18477

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serhiy-storchaka merged 2 commits intopython:masterfrom
serhiy-storchaka:ast-start-pos-trailers
Feb 12, 2020
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bpo-39474: Fix AST pos for expressions like (a)(b), (a)[b] and (a).b.#18477
serhiy-storchaka merged 2 commits intopython:masterfrom
serhiy-storchaka:ast-start-pos-trailers

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@serhiy-storchaka serhiy-storchaka commented Feb 12, 2020 •
edited by bedevere-bot
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@serhiy-storchaka serhiy-storchaka added type-bug An unexpected behavior, bug, or error needs backport to 3.8 labels Feb 12, 2020
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codecov bot commented Feb 12, 2020 •
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Codecov Report

Merging #18477 into master will increase coverage by 0.00%.
The diff coverage is n/a.

Impacted file tree graph

@@            Coverage Diff            @@
##           master   #18477     +/-   ##
=========================================
  Coverage   82.11%   82.12%             
=========================================
  Files        1956     1955      -1     
  Lines      589067   583729   -5338     
  Branches    44436    44437      +1     
=========================================
- Hits       483723   479376   -4347     
+ Misses      95690    94708    -982     
+ Partials     9654     9645      -9
Impacted Files Coverage Δ
Lib/distutils/tests/test_bdist_rpm.py 30.00% <0.00%> (-65.00%) ⬇️
Lib/distutils/command/bdist_rpm.py 7.63% <0.00%> (-56.88%) ⬇️
Lib/test/test_urllib2net.py 76.92% <0.00%> (-13.85%) ⬇️
Lib/test/test_smtpnet.py 78.57% <0.00%> (-7.15%) ⬇️
Lib/ftplib.py 63.85% <0.00%> (-6.06%) ⬇️
Lib/test/test_ftplib.py 87.11% <0.00%> (-4.72%) ⬇️
Tools/scripts/db2pickle.py 17.82% <0.00%> (-3.97%) ⬇️
Tools/scripts/pickle2db.py 16.98% <0.00%> (-3.78%) ⬇️
Lib/test/test_socket.py 71.94% <0.00%> (-3.77%) ⬇️
Lib/test/test_asyncio/test_base_events.py 91.84% <0.00%> (-3.30%) ⬇️
... and 327 more

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@pablogsal pablogsal mentioned this pull request Feb 12, 2020
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lysnikolaou
lysnikolaou approved these changes Feb 12, 2020
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LGTM!

gvanrossum
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From a quick glance LG.

Would it make sense to add a test for e.g. ((a)).b?

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serhiy-storchaka commented Feb 12, 2020

We can add complex examples like ((((a+b).c)[d])(e))().f, but it would not cover anything that was not already covered by the minimal example (a).b.

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gvanrossum commented Feb 12, 2020

I don't need complex example, but I'd like a single example showing ((a)).b, since IIRC there's some special code involved in removing redundant parentheses, and I feel that that special case was involved in the bug in the first place.

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gvanrossum commented Feb 12, 2020

Honestly I take it back, you can land.

@serhiy-storchaka serhiy-storchaka merged commit 6e619c4 into python:master Feb 12, 2020
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miss-islington commented Feb 12, 2020

Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.8.
🐍🍒⛏🤖

@serhiy-storchaka serhiy-storchaka deleted the ast-start-pos-trailers branch February 12, 2020 20:37
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bedevere-bot commented Feb 12, 2020

GH-18491 is a backport of this pull request to the 3.8 branch.

miss-islington added a commit that referenced this pull request Feb 12, 2020
@miss-islington @serhiy-storchaka
bpo-39474: Fix AST pos for expressions like (a)(b), (a)[b] and (a).b. (…
2076d4f 
…GH-18477)

(cherry picked from commit 6e619c4)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
@sthagen sthagen mentioned this pull request Feb 12, 2020
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@lysnikolaou lysnikolaou mentioned this pull request Feb 13, 2020
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colesbury referenced this pull request in colesbury/nogil Oct 6, 2021
@serhiy-storchaka @colesbury
bpo-39474: Fix AST pos for expressions like (a)(b), (a)[b] and (a).b.…
90a5109 
… (GH-18477)
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@gvanrossum gvanrossum gvanrossum approved these changes

@lysnikolaou lysnikolaou lysnikolaou approved these changes

@isidentical isidentical isidentical approved these changes

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