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* [Bug c++/50519] New: -Wconversion false positive warning
@ 2011-09-25 21:13 ebrahim at mohammadi dot ir
  2011-09-25 21:14 ` [Bug c++/50519] " ebrahim at mohammadi dot ir
  2011-09-25 22:00 ` manu at gcc dot gnu.org
  0 siblings, 2 replies; 3+ messages in thread
From: ebrahim at mohammadi dot ir @ 2011-09-25 21:13 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50519

             Bug #: 50519
           Summary: -Wconversion false positive warning
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ebrahim@mohammadi.ir


Created attachment 25363
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25363
Example source code to trigger the bug

My colleague discovered g++ reports a false warning with -Wconversion flag in
some circumstances. An example source code which triggers the bug is attached.

Output of my 'g++ -v':

Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.1-10'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc
--with-arch-32=i586 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.1 (Debian 4.6.1-10)


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug c++/50519] -Wconversion false positive warning
  2011-09-25 21:13 [Bug c++/50519] New: -Wconversion false positive warning ebrahim at mohammadi dot ir
@ 2011-09-25 21:14 ` ebrahim at mohammadi dot ir
  2011-09-25 22:00 ` manu at gcc dot gnu.org
  1 sibling, 0 replies; 3+ messages in thread
From: ebrahim at mohammadi dot ir @ 2011-09-25 21:14 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50519

Ebrahim Mohammadi <ebrahim at mohammadi dot ir> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebrahim at mohammadi dot ir

--- Comment #1 from Ebrahim Mohammadi <ebrahim at mohammadi dot ir> 2011-09-25 20:56:17 UTC ---
Example compiling scenario:

$ g++ -Wconversion conversion-warning-false-positive.cpp -o /dev/null 
conversion-warning-false-positive.cpp: In function ‘int main()’:
conversion-warning-false-positive.cpp:9:22: warning: conversion to ‘short int’
from ‘int’ may alter its value [-Wconversion]


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug c++/50519] -Wconversion false positive warning
  2011-09-25 21:13 [Bug c++/50519] New: -Wconversion false positive warning ebrahim at mohammadi dot ir
  2011-09-25 21:14 ` [Bug c++/50519] " ebrahim at mohammadi dot ir
@ 2011-09-25 22:00 ` manu at gcc dot gnu.org
  1 sibling, 0 replies; 3+ messages in thread
From: manu at gcc dot gnu.org @ 2011-09-25 22:00 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50519

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |manu at gcc dot gnu.org
         Resolution|                            |DUPLICATE

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2011-09-25 21:12:32 UTC ---
I had a patch to fix this but it was rejected. I am not working on this
anymore, feel free to update the patch and try to get it accepted.

*** This bug has been marked as a duplicate of bug 40752 ***


^ permalink raw reply	[flat|nested] 3+ messages in thread
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2011-09-25 21:13 [Bug c++/50519] New: -Wconversion false positive warning ebrahim at mohammadi dot ir
2011-09-25 21:14 ` [Bug c++/50519] " ebrahim at mohammadi dot ir
2011-09-25 22:00 ` manu at gcc dot gnu.org

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