[Pkg-scicomp-devel] Bug#528812: GMP on ppc64: gcc ICE: Segmentation fault

[Bill Allombert]

Package: libgmp3c2
Version: 2:4.2.4+dfsg-8
Severity: grave

I have a problem related to #528768 on my PS3 (which is a ppc64 machine),
but which is sufficiently different to warrant a separate report:

For some files (deterministically, but for maybe 10% of my project C files),
GCC crash:

/src/headers -I../src/graph -o plotport.o ../src/graph/plotport.c
../src/graph/plotport.c: In function 'rectticks':
../src/graph/plotport.c:477: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions.
make: *** [plotport.o] Error 1

This is very reproducible and independant whether I install the lib64gmp
packages.

The error occurs inside cc1 which is linked to libgmp3c2.

Here the GDB output:

Program received signal SIGSEGV, Segmentation fault.
0x0ffbd420 in mpfr_tmp_free () from /usr/lib/libmpfr.so.1
(gdb) list
No symbol table is loaded.  Use the "file" command.
(gdb) bt
#0  0x0ffbd420 in mpfr_tmp_free () from /usr/lib/libmpfr.so.1
#1  0x0ff98bfc in mpfr_mul () from /usr/lib/libmpfr.so.1
#2  0x0ff902c4 in mpfr_agm () from /usr/lib/libmpfr.so.1
#3  0x0ff97e24 in mpfr_log () from /usr/lib/libmpfr.so.1
#4  0x1007a240 in ?? ()
#5  0x10082b14 in ?? ()
#6  0x1008440c in ?? ()
...

So far I have tested the following combination:
sid   GCC + sid GMP -> crash
lenny GCC + backported sid GMP -> crash
lenny GCC + lenny GMP -> OK
lenny GCC + special lib64gmp build from Etch GMP -> OK
etch  GCC + special lib64gmp build from Etch GMP -> OK

Cheers,
-- 
Bill. <ballombe at debian.org>

Imagine a large red swirl here.