[Bug tree-optimization/103050] [12 Regression] 520.omnetpp_r miscompiled after r12-4787-gb8ef019ab938471f

["marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103050

--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Alternatively, one can see the memory corruption during LTO bootstrap in Go
library build:

$ ../configure --enable-languages=c,c++,lto,go --disable-multilib
--disable-libsanitizer --with-build-config=bootstrap-lto
...
$ make -j100
...

free(): invalid pointer
go1: internal compiler error: Aborted
libtool: compile:  /home/mliska/Programming/gcc/objdir/./gcc/gccgo
-B/home/mliska/Programming/gcc/objdir/./gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/
-isystem /usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include -minline-all-stringops -O2 -g -I .
-c -fgo-pkgpath=image/color/palette
../../../libgo/go/image/color/palette/generate.go
../../../libgo/go/image/color/palette/palette.go -o image/color/palette.o
>/dev/null 2>&1
libtool: compile:  /home/mliska/Programming/gcc/objdir/./gcc/gccgo
-B/home/mliska/Programming/gcc/objdir/./gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/
-isystem /usr/local/x86_64-pc-linux-gnu/include -isystem
/usr/local/x86_64-pc-linux-gnu/sys-include -minline-all-stringops -O2 -g -I .
-c -fgo-pkgpath=math -mfancy-math-387 -ffp-contract=off -fno-math-errno
-fno-trapping-math ../../../libgo/go/math/abs.go
../../../libgo/go/math/acosh.go ../../../libgo/go/math/asin.go
../../../libgo/go/math/asinh.go ../../../libgo/go/math/atan.go
../../../libgo/go/math/atan2.go ../../../libgo/go/math/atanh.go
../../../libgo/go/math/bits.go ../../../libgo/go/math/cbrt.go
../../../libgo/go/math/const.go ../../../libgo/go/math/copysign.go
../../../libgo/go/math/dim.go ../../../libgo/go/math/dim_noasm.go
../../../libgo/go/math/erf.go ../../../libgo/go/math/erfinv.go
../../../libgo/go/math/exp.go ../../../libgo/go/math/exp2_noasm.go
../../../libgo/go/math/exp_amd64.go ../../../libgo/go/math/exp_noasm.go
../../../libgo/go/math/expm1.go ../../../libgo/go/math/floor.go
../../../libgo/go/math/floor_noasm.go ../../../libgo/go/math/fma.go
../../../libgo/go/math/frexp.go ../../../libgo/go/math/gamma.go
../../../libgo/go/math/hypot.go ../../../libgo/go/math/j0.go
../../../libgo/go/math/j1.go ../../../libgo/go/math/jn.go
../../../libgo/go/math/ldexp.go ../../../libgo/go/math/lgamma.go
../../../libgo/go/math/log.go ../../../libgo/go/math/log10.go
../../../libgo/go/math/log1p.go ../../../libgo/go/math/logb.go
../../../libgo/go/math/mod.go ../../../libgo/go/math/modf.go
../../../libgo/go/math/modf_noasm.go ../../../libgo/go/math/nextafter.go
../../../libgo/go/math/pow.go ../../../libgo/go/math/pow10.go
../../../libgo/go/math/remainder.go ../../../libgo/go/math/signbit.go
../../../libgo/go/math/sin.go ../../../libgo/go/math/sincos.go
../../../libgo/go/math/sinh.go ../../../libgo/go/math/sqrt.go
../../../libgo/go/math/stubs.go ../../../libgo/go/math/tan.go
../../../libgo/go/math/tanh.go ../../../libgo/go/math/trig_reduce.go
../../../libgo/go/math/unsafe.go -o math.o >/dev/null 2>&1
0xe694a3 crash_signal
        ../../gcc/toplev.c:322
0x9492cc Struct_type::write_to_c_header(std::basic_ostream<char,
std::char_traits<char> >&) const
        ../../gcc/go/gofrontend/types.cc:7055
0x8d16a3 Gogo::write_c_header()
        ../../gcc/go/gofrontend/gogo.cc:5382
0x8eea19 Gogo::do_exports()
        ../../gcc/go/gofrontend/gogo.cc:5251
0x8ef0e3 Gogo::do_exports()
        ../../gcc/go/gofrontend/gogo.cc:5204
0x8ef0e3 go_parse_input_files(char const**, unsigned int, bool, bool)
        ../../gcc/go/gofrontend/go.cc:159
0x8ad773 go_langhook_parse_file
        ../../gcc/go/go-lang.c:359