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* [Bug fortran/57127] New: gfortran gives unintended warning on uninitialized optional dummy array of undetermined size
@ 2013-04-30 17:34 AstroFloyd at gmail dot com
2013-04-30 20:57 ` [Bug fortran/57127] " AstroFloyd at gmail dot com
0 siblings, 1 reply; 2+ messages in thread
From: AstroFloyd at gmail dot com @ 2013-04-30 17:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57127
Bug #: 57127
Summary: gfortran gives unintended warning on uninitialized
optional dummy array of undetermined size
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: AstroFloyd@gmail.com
Created attachment 29985
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29985
Source file example.f90 used in the example in the bug report
gfortran-4.7.2 -O1 -Wall gives unintended warning about uninitialized array
elements when a routine is called with an optional dummy array of undetermined
size (example.f90 is attached below):
$ gfortran -O1 -Wall example.f90 -o example && ./example
example.f90: In function ‘example_routine’:
example.f90:8:0: warning: ‘array.0’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
Expected behaviour: no warning message.
The warning goes away when:
* -O0 is used rather than -O1 or higher
* -Wall is replaced by -Wmaybe-uninitialized
* the line write(op,'(A)') 'foo' is commented out
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/57127] gfortran gives unintended warning on uninitialized optional dummy array of undetermined size
Date: Tue, 30 Apr 2013 17:51:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Component: fortran
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: dominiq at lps dot ens.fr
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P3
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Message-ID: <bug-57127-4-JF8GFCNI3v@http.gcc.gnu.org/bugzilla/>
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW127
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-04-30
Ever Confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2013-04-30 17:51:49 UTC ---
The warning is present for 4.6, 4.7, 4.8, and trunk.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug fortran/57127] gfortran gives unintended warning on uninitialized optional dummy array of undetermined size
2013-04-30 17:34 [Bug fortran/57127] New: gfortran gives unintended warning on uninitialized optional dummy array of undetermined size AstroFloyd at gmail dot com
@ 2013-04-30 20:57 ` AstroFloyd at gmail dot com
0 siblings, 0 replies; 2+ messages in thread
From: AstroFloyd at gmail dot com @ 2013-04-30 20:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57127
--- Comment #2 from AstroFloyd <AstroFloyd at gmail dot com> 2013-04-30 20:57:55 UTC ---
Hmmm, this looks very strongly like
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52370 but is not identical(?)
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-04-30 17:34 [Bug fortran/57127] New: gfortran gives unintended warning on uninitialized optional dummy array of undetermined size AstroFloyd at gmail dot com
2013-04-30 20:57 ` [Bug fortran/57127] " AstroFloyd at gmail dot com
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