[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66602

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2015-06-19
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It works fine for me.

You haven't said what it prints for you, or even said which version of GCC you
are using so it's impossible to know if this is an ancient bug that was fixed
long ago.

Please provide the output of 'g++ -v' as requested by https://gcc.gnu.org/bugs/

[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[daniel.kruegler at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66602

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler@googlemail.
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--- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
It seems that gcc 5.1.0 produces a random value such as

557195712

or

-214982144

for the first output statement when compiled against C++11 or beyond that C++
target version. It seems, though, that the current head (tested agains gcc HEAD
6.0.0 20150619 (experimental)) has fixed that problem.
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Subject: [Bug c++/66603] using std::cout causes segfault with unrelated array declaration
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66603

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

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                 CC|                            |daniel.kruegler@googlemail.
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--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
The segfault also occurs in the current head (tested: gcc HEAD 6.0.0 20150619
(experimental))
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Subject: [Bug c++/66585] [5/6 Regression] Internal compiler error when initialize field with lambda
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf585

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jun 19 19:17:16 2015
New Revision: 224694

URL: https://gcc.gnu.org/viewcvs?rev"4694&root=gcc&view=rev
Log:
        PR c++/66585
        * pt.c (instantiate_class_template_1): Clear
        cp_unevaluated_operand and c_inhibit_evaluation_warnings.

Added:
    branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-nsdmi8.C
Modified:
    branches/gcc-5-branch/gcc/cp/ChangeLog
    branches/gcc-5-branch/gcc/cp/pt.c

[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[so61pi.re at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66602

--- Comment #3 from so61pi.re at gmail dot com ---
My current version of GCC is 5.1.0 on Windows, but I also tested on Linux with
same GCC version, and it produced the same bug, which printed random value like
Daniel Krügler have showed.

Apparently, this bug is fixed in gcc HEAD 6.0.0 20150619 (experimental).


My command line was:

g++ -std=c++14 main.cpp -o main.exe


And here is the output of 'g++ -v' on my system:

Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=d:/tools/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/5.1.0/l
to-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../src/configure --with-gmp=/c/temp/gcc/gmp
--with-mpfr=/c/temp/gcc/mpfr --with-mpc=/c/temp/gcc/mpc
--enable-languages=c,c++ --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32
--target=x86_64-w64-mingw32 --disable-multilib --prefix=/c/temp/gcc/dest
--with-sysroot=/c/temp/gcc/dest --disable-libstdcxx-pch --disable-nls
--disable-shared --disable-win32-registry --enable-checking=release
--with-tune=haswell
Thread model: win32
gcc version 5.1.0 (GCC)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf598

Mikael Pettersson <mikpelinux at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikpelinux at gmail dot com

--- Comment #1 from Mikael Pettersson <mikpelinux at gmail dot com> ---
I can reproduce the SEGV with current gcc-6, 5, and 4.9, but not with 4.8 or
4.7.
Dropping from -O3 to -O2 also prevents the SEGV.

[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66602

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
      Known to work|                            |5.1.1, 6.0
            Version|unknown                     |5.1.0
      Known to fail|                            |5.1.0

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It also seems to be fixed in 5.1.1

[Bug c++/66602] std::tuple bug when constructed with temporary empty object

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66602

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Closing then.