Using built-in specs. COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3/gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.6.3/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-4.6.3/work/gcc-4.6.3/configure --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include/g++-v4 --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec --disable-fixed-point --without-ppl --without-cloog --enable-lto --enable-nls --without-included-gettext --with-system-zlib --enable-obsolete --disable-werror --enable-secureplt --disable-multilib --enable-libmudflap --disable-libssp --enable-libgomp --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.6.3/python --enable-checking=release --disable-libgcj --enable-libstdcxx-time --enable-languages=c,c++,fortran --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-targets=all --with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.6.3 p1.11, pie-0.5.2' Thread model: posix gcc version 4.6.3 (Gentoo 4.6.3 p1.11, pie-0.5.2) COLLECT_GCC_OPTIONS='-std=c++0x' '-save-temps' '-v' '-o' 'test' '-mtune=generic' '-march=x86-64' /usr/libexec/gcc/x86_64-pc-linux-gnu/4.6.3/cc1plus -E -quiet -v -D_GNU_SOURCE test.cpp -mtune=generic -march=x86-64 -std=c++0x -fpch-preprocess -o test.ii ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include/g++-v4 /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include/g++-v4/x86_64-pc-linux-gnu /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include/g++-v4/backward /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/include-fixed /usr/include End of search list. COLLECT_GCC_OPTIONS='-std=c++0x' '-save-temps' '-v' '-o' 'test' '-mtune=generic' '-march=x86-64' /usr/libexec/gcc/x86_64-pc-linux-gnu/4.6.3/cc1plus -fpreprocessed test.ii -quiet -dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase test -std=c++0x -version -o test.s GNU C++ (Gentoo 4.6.3 p1.11, pie-0.5.2) version 4.6.3 (x86_64-pc-linux-gnu) compiled by GNU C version 4.6.3, GMP version 5.1.0, MPFR version 3.1.1-p2, MPC version 1.0.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++ (Gentoo 4.6.3 p1.11, pie-0.5.2) version 4.6.3 (x86_64-pc-linux-gnu) compiled by GNU C version 4.6.3, GMP version 5.1.0, MPFR version 3.1.1-p2, MPC version 1.0.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 64306da8006a5416135a72df2a9600e1 test.cpp: In function ‘int main(int, char**)’: test.cpp:9:36: internal compiler error: Segmentation fault
Created attachment 29579 [details] A preprocessed file causing bug
Both 4.7 and mainline are fine.
The ICE is #0 0x00000000007bafa2 in c_common_signed_or_unsigned_type (unsignedp=1, type=0x0) at /space/rguenther/src/svn/gcc-4_6-branch/gcc/c-family/c-common.c:3018 #1 0x00000000007bfe47 in shorten_compare (op0_ptr=0x7fffffffcb80, op1_ptr=0x7fffffffcb78, restype_ptr=0x7fffffffcb70, rescode_ptr=0x7fffffffcb6c) at /space/rguenther/src/svn/gcc-4_6-branch/gcc/c-family/c-common.c:3567 3562 else if (unsignedp0 == unsignedp1 && real1 == real2 3563 && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) 3564 && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) 3565 { 3566 type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); 3567 type = c_common_signed_or_unsigned_type (unsignedp0 3568 || TYPE_UNSIGNED (*restype_ptr), 3569 type); which ends up calling cp_common_type which has (still also on trunk): static tree cp_common_type (tree t1, tree t2) { ... if (SCOPED_ENUM_P (t1) || SCOPED_ENUM_P (t2)) { if (TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2)) return build_type_attribute_variant (t1, attributes); else return NULL_TREE; } but common_type () is not expected to return NULL_TREE. ISTR this bug, it got fixed for 4.7+.