[Bug c++/51108] New: g++ segfault

["rec-for-bugzilla at yandex dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51108

             Bug #: 51108
           Summary: g++ segfault
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rec-for-bugzilla@yandex.ru


I know, that this code snippet is very bizarre and strange...
But anyway, i think that compiler must show nice error message
instead of segfaulting.
If i comment out line with 'case 2:' then code compiles without
errors and warnings, that isn't good too.


===== begin code =====
int main(int argc, char **argv)
{
    switch (argc)
    {
        case 2:
        struct Test
        {
            Test()
            {
                case 1:;
            }
        } x;
    }
    return 0;
}
===== end code =====

Command line:
g++ -c -v -save-temps 1.cpp

Output:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.6.1/lto-wrapper
Target: i686-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.1-9ubuntu3' --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 --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin
--enable-objc-gc --enable-targets=all --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=i686-linux-gnu
--host=i686-linux-gnu --target=i686-linux-gnu
Thread model: posix
gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) 
COLLECT_GCC_OPTIONS='-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=i686'
 /usr/lib/gcc/i686-linux-gnu/4.6.1/cc1plus -E -quiet -v -imultilib .
-imultiarch i386-linux-gnu -D_GNU_SOURCE 1.cpp -mtune=generic -march=i686
-fpch-preprocess -fstack-protector -o 1.ii
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../../i686-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.6
 /usr/include/c++/4.6/i686-linux-gnu/.
 /usr/include/c++/4.6/backward
 /usr/lib/gcc/i686-linux-gnu/4.6.1/include
 /usr/local/include
 /usr/lib/gcc/i686-linux-gnu/4.6.1/include-fixed
 /usr/include/i386-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-c' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=i686'
 /usr/lib/gcc/i686-linux-gnu/4.6.1/cc1plus -fpreprocessed 1.ii -quiet -dumpbase
1.cpp -mtune=generic -march=i686 -auxbase 1 -version -fstack-protector -o 1.s
GNU C++ (Ubuntu/Linaro 4.6.1-9ubuntu3) version 4.6.1 (i686-linux-gnu)
    compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version 3.0.1-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (Ubuntu/Linaro 4.6.1-9ubuntu3) version 4.6.1 (i686-linux-gnu)
    compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version 3.0.1-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: d77347ff65634d82ca51aadf7727a2c5
1.cpp: In constructor 'main(int, char**)::Test::Test()':
1.cpp:10:17: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cclIXtNW.out file, please attach this to
your bugreport.