https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66038
--- Comment #3 from Douglas Mencken <dougmencken at gmail dot com> --- (In reply to Richard Biener from comment #2) > I think you may run into a host compiler issue? (ISTR a similar bug for > darwin) > > What is your host compiler? I suppose ppc-darwin still uses gcc 4.2.x, > right? My stage0 compiler is 4.9.2 (not Apple-patched 4.2.1). I also mentioned its "-v output" in above comment. But I doubt it is related to host compiler... This is happening on stage2, and $ prev-gcc/build/genmatch --gimple ../gcc-5.1.0/gcc/match.pd works well. It is $ gcc/build/genmatch --gimple ../gcc-5.1.0/gcc/match.pd that fails. Backtrace. $ gdb --args gcc/build/genmatch --gimple ../gcc-5.1.0/gcc/match.pd (gdb) run Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x419e04bc 0x0000dcb0 in operand::gen_transform () (gdb) bt #0 0x0000dcb0 in operand::gen_transform () #1 0x00007fd8 in get_operator () #2 0x000099a0 in parser::parse_operator_list () #3 0x0000cc38 in parser::parse_pattern () #4 0x0000dc44 in parser::parser () #5 0x0006357c in main () at ../../../../gcc-5.1.0/libstdc++-v3/libsupc++/eh_alloc.cc:121
