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From: "dougmencken at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/66038] SIGSEGV at stage 2 build/genmatch --gimple ../../gcc-5.1.0/gcc/match.pd
Date: Sat, 09 May 2015 04:37:00 -0000
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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