Comment # 5 on bug 1124091 from Richard Biener

Can you possibly help by doing

echo '#include <limits>' > test.c ; g++ -c test.c -v

then from the output cut&paste that reads sth like

 /usr/lib64/gcc/x86_64-suse-linux/8/cc1plus -quiet -v ....

and run that within gdb like

> gdb --args <the-cut&pasted-command>
... gdb output ...
(gdb) run
... the internal compiler error should occur ...
(gdb) bt
... prints a backtrace, cut&paste it in this bug ...
(gdb) disassemble
... prints disassebly, you might need to press return until a line
... starting with "=> ..." appears - that's the instruction that
... was illegal.  Please cut&paste a bit of context around that
... instruction

I suspect it is GMP that is at fault.