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: unassig...@gcc.gnu.org ReportedBy: rec-for-bugzi...@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.