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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/108244] [13 Regression] `pragma GCC diagnostic`
 and -E -fdirectives-only causes the preprocessor to become confused
Date: Wed, 28 Dec 2022 17:32:53 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: preprocessor
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: diagnostic, ice-on-valid-code, needs-bisection,
 rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 13.0
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X-Bugzilla-Changed-Fields: cf_reconfirmed_on bug_status everconfirmed
 keywords short_desc
Message-ID: <bug-108244-4-WVcQQBIrLZ@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108244

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2022-12-28
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
           Keywords|                            |diagnostic,
                   |                            |needs-bisection,
                   |                            |rejects-valid
            Summary|[13 Regression] Cannot      |[13 Regression] `pragma GCC
                   |preprocess standard         |diagnostic` and -E
                   |<algorithm> header with -E  |-fdirectives-only causes
                   |-fdirectives-only           |the preprocessor to become
                   |                            |confused

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase that shows the issue (different warning/error message thou=
gh):
```
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
#ifdef t
#endif
```
This gives:
<source>:1:9: warning: extra tokens at end of #ifdef directive
    1 | #pragma GCC diagnostic push
      |         ^
Compiler returned: 0=