[Bug c++/53150] New: g++ crashes if struct member initializer references to local variable

[Bug c++/53150] New: g++ crashes if struct member initializer references to local variable

[yuzurufag+gcc at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53150

             Bug #: 53150
           Summary: g++ crashes if struct member initializer references to
                    local variable
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: yuzurufag+gcc@gmail.com


$ g++ -std=c++0x crash.cpp 
crash.cpp: In constructor ‘constexpr main()::<anonymous struct>::._0()’:
crash.cpp:5:2: internal compiler error: in expand_expr_real_1, at expr.c:9147
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccPW0iTF.out file, please attach this to
your bugreport.


$ cat /tmp/ccPW0iTF.out
// /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1plus -quiet -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE crash.cpp -quiet -dumpbase crash.cpp
-mtune=generic -march=x86-64 -auxbase crash -std=c++11 -fstack-protector -o -
-frandom-seed=0
# 1 "crash.cpp"
# 1 "<command-line>"
# 1 "crash.cpp"
int main()
{
 int foo = 42;
 struct
 {
  int bar = foo;
 } baz;
}


$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.0-4ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --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++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--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 4.7.0 (Ubuntu/Linaro 4.7.0-4ubuntu2)

[Bug c++/53150] [C++0x] g++ crashes if struct member initializer references to local variable

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53150

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-02
            Summary|g++ crashes if struct       |[C++0x] g++ crashes if
                   |member initializer          |struct member initializer
                   |references to local         |references to local
                   |variable                    |variable
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-02 10:36:12 UTC ---
Confirmed.  Not sure if this is valid code, leaving as C++ for now.  4.6
rejects
it (no NSDMI).

[Bug c++/53150] [C++0x] g++ crashes if struct member initializer references to local variable

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53150

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-02 11:04:35 UTC ---
It's invalid

[class.local]/1
Declarations in a local class shall not odr-use (3.2) a variable with automatic
storage duration from an enclosing scope.

It would be valid if foo was declared const, because then it would not be
odr-used.

[Bug c++/53150] [C++0x] g++ crashes if struct member initializer references to local variable

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53150

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.9.0

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-05-05 12:05:30 UTC ---
The ICE is fixed in mainline, I'm adding the testcase and closing the bug.

[Bug c++/53150] [C++0x] g++ crashes if struct member initializer references to local variable

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53150

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

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

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-05-05 12:09:35 UTC ---
Oh well, this is an exact duplicate.

*** This bug has been marked as a duplicate of bug 55240 ***