[Bug c++/65973] New: Current gcc 6 snapshot fails with segmentation fault when compiling C++14 code

[Bug c++/65973] New: Current gcc 6 snapshot fails with segmentation fault when compiling C++14 code

[philipp.classen at gmx dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

            Bug ID: 65973
           Summary: Current gcc 6 snapshot fails with segmentation fault
                    when compiling C++14 code
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: philipp.classen at gmx dot net
  Target Milestone: ---

Created attachment 35439
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35439&action=edit
gzipped output of "-freport-bug"

Current gcc 6 snapshot fails to compile C++14 code:

internal compiler error: Segmentation fault

g++ -freport-bug -DHAVE_CONFIG_H -I.  -Wall -Wfatal-errors -Wextra
-Wno-type-limits -Wstrict-aliasing -Wvla -Wdisabled-optimization
-Wdouble-promotion  -pipe --std=c++1y   -D
EXTENDED_PARALLEL_LOGGING__DEPENDS_ON_TARGET__  -DUSE_TABLEBASES
-DUSE_NALIMOV_TABLEBASES  -DENABLE_GHOST_HTTP_SERVER  -DUSE_BITBASES
-DUSE_SINGLE_PAWN_BITBASES -DUSE_TWO_PAWNS_BITBASES -DUSE_RAMMED_PAWNS_BITBASES
    -g3   -I gmock-bundle/include -I gmock-bundle/gtest/include -g  -MT
debug-ghost.o -MD -MP -MF .deps/debug-ghost.Tpo -c -o debug-ghost.o `test -f
'ghost.cpp' || echo './'`ghost.cpp
In file included from evaluation.h:8:0,
                 from ghost.cpp:15:
evaluation_value.h: In constructor ‘constexpr
GhostEvaluation::OptimizedForAdding::VALUE::VALUE(int, int)’:
evaluation_value.h:243:5: internal compiler error: Segmentation fault
     }
     ^
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From: "vz-gcc at zeitlins dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65974] New: Bogus deprecated-declarations warnings for inline definitions of deprecated virtual methods
Date: Sat, 02 May 2015 01:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide974

            Bug ID: 65974
           Summary: Bogus deprecated-declarations warnings for inline
                    definitions of deprecated virtual methods
           Product: gcc
           Version: 5.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vz-gcc at zeitlins dot org
  Target Milestone: ---

Consider the following example:

        % cat -n deprdecl.cpp
             1  struct S {
             2      void bar();
             3
             4      __attribute__((deprecated("use bar() instead.")))
             5      virtual void foo();
             6  };
             7
             8  inline void S::foo() { bar(); }
             9
            10  int main()
            11  {
            12      return 0;
            13  }
        % g++-5 -c -Wall deprdecl.cpp
        deprdecl.cpp:13:1: warning: 'virtual void S::foo()' is deprecated: use
bar() instead. [-Wdeprecated-declarations]
         }
         ^
        deprdecl.cpp:8:13: note: declared here
         inline void S::foo() { bar(); }
                     ^

I believe this warning shouldn't appear when the deprecated method is just
being defined and not used. Notice that it indeed does not appear if the method
is either not virtual (i.e. remove "virtual" in line 5) or is defined inline
(i.e. move the body from line 8 to line 5). Nor does it appear with 4.9.

Also notice that the warning location is always the last line of the last
function in the file and has nothing to do with the function it complains
about.

This warning may look like not a big deal, but when compiling my real code it
occurs many thousands times making it impossible to use deprecated attribute
with g++ 5.1.

Compiler information:

        % g++-5 -v
        Using built-in specs.
        COLLECT_GCC=g++-5
        COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
        Target: x86_64-linux-gnu
        Configured with: ../src/configure -v --with-pkgversion='Debian 5.1.1-2'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=c++11 --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --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 5.1.1 (Debian 5.1.1-2)

[Bug c++/65973] segmentation fault when compiling C++14 code

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r217663.

[Bug c++/65973] segmentation fault when compiling C++14 code

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

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

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 65985 has been marked as a duplicate of this bug. ***

[Bug c++/65973] [5/6 Regression] segmentation fault when compiling C++14 code

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jun 19 18:15:30 2015
New Revision: 224677

URL: https://gcc.gnu.org/viewcvs?rev=224677&root=gcc&view=rev
Log:
        PR c++/65973
        * constexpr.c (build_constexpr_constructor_member_initializers):
        Handle an empty STATEMENT_LIST.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-empty1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c

[Bug c++/65973] [5/6 Regression] segmentation fault when compiling C++14 code

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Jun 19 18:24:24 2015
New Revision: 224682

URL: https://gcc.gnu.org/viewcvs?rev=224682&root=gcc&view=rev
Log:
        PR c++/65973
        * constexpr.c (build_constexpr_constructor_member_initializers):
        Handle an empty STATEMENT_LIST.

Added:
    branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-empty1.C
Modified:
    branches/gcc-5-branch/gcc/cp/ChangeLog
    branches/gcc-5-branch/gcc/cp/constexpr.c

[Bug c++/65973] [5/6 Regression] segmentation fault when compiling C++14 code

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

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

--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
fixed.