[Bug c/33575] New: segfault while building libgcc

["karthikkumar at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Hi. an error occured while compiling to _muldi3.o of libgcc

A verbose/gdb shows a null reference somewhere in fold_builtin_1 in
gcc/builtins.c, line 9768 

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This GDB was configured as "i486-slackware-linux"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /home/karthik/WS/act/gcc-mainline-dp-build/gcc/cc1 -quiet -v
-I. -I. -I../.././gcc -I../../../gcc-mainline-dp/libgcc
-I../../../gcc-mainline-dp/libgcc/. -I../../../gcc-mainline-dp/libgcc/../gcc
-I../../../gcc-mainline-dp/libgcc/../include
-I../../../gcc-mainline-dp/libgcc/config/libbid -iprefix
/home/karthik/WS/act/gcc-mainline-dp-build/gcc/../lib/gcc/i686-pc-linux-gnu/4.3.0/
-isystem /home/karthik/WS/act/gcc-mainline-dp-build/./gcc/include -isystem 
/home/karthik/WS/act/gcc-mainline-dp-build/./gcc/include-fixed -MD _muldi3.d
-MF _muldi3.dep -MP -MT _muldi3.o -DIN_GCC -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS
-DL_muldi3 -DHIDE_EXPORTS -isystem
/opt/gcc-mainline-dp/i686-pc-linux-gnu/include -isystem
/opt/gcc-mainline-dp/i686-pc-linux-gnu/sys-include -isystem ./include
../../../gcc-mainline-dp/libgcc/../gcc/libgcc2.c -quiet -dumpbase libgcc2.c
-mtune=generic -auxbase-strip _muldi3.o -g -g -g -O2 -O2 -O2 -O2 -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-version -fomit-frame-pointer -fPIC -fvisibility=hidden -o /tmp/cc77FHjt.s
ignoring nonexistent directory "/opt/gcc-mainline-dp/i686-pc-linux-gnu/include"
ignoring nonexistent directory
"/opt/gcc-mainline-dp/i686-pc-linux-gnu/sys-include"
ignoring nonexistent directory "./include"
ignoring nonexistent directory
"/home/karthik/WS/act/gcc-mainline-dp-build/gcc/../lib/gcc/i686-pc-linux-gnu/4.3.0/include"
ignoring nonexistent directory
"/home/karthik/WS/act/gcc-mainline-dp-build/gcc/../lib/gcc/i686-pc-linux-gnu/4.3.0/include-fixed"
ignoring nonexistent directory
"/home/karthik/WS/act/gcc-mainline-dp-build/gcc/../lib/gcc/i686-pc-linux-gnu/4.3.0/../../../../i686-pc-linux-gnu/include"
ignoring nonexistent directory "/opt/gcc-mainline-dp/include"
ignoring nonexistent directory
"/opt/gcc-mainline-dp/lib/gcc/i686-pc-linux-gnu/4.3.0/include"
ignoring nonexistent directory
"/opt/gcc-mainline-dp/lib/gcc/i686-pc-linux-gnu/4.3.0/include-fixed"
ignoring nonexistent directory "/opt/gcc-mainline-dp/i686-pc-linux-gnu/include"
ignoring duplicate directory "."
ignoring duplicate directory "../../../gcc-mainline-dp/libgcc/."
#include "..." search starts here:
#include <...> search starts here:
 .
 ../.././gcc
 ../../../gcc-mainline-dp/libgcc
 ../../../gcc-mainline-dp/libgcc/../gcc
 ../../../gcc-mainline-dp/libgcc/../include
 ../../../gcc-mainline-dp/libgcc/config/libbid
 /home/karthik/WS/act/gcc-mainline-dp-build/./gcc/include
 /home/karthik/WS/act/gcc-mainline-dp-build/./gcc/include-fixed
 /usr/local/include
 /usr/include
End of search list.
GNU C (GCC) version 4.3.0 20070927 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 4.3.0 20070927 (experimental), GMP version
4.2.1, MPFR version 2.2.1-p1.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 1f5c3ab45e0ab524f80d84058122b450

Program received signal SIGSEGV, Segmentation fault.
0x08108292 in fold_builtin_1 (fndecl=0xb7ceb680, arg0=0xb7bb9bc0, ignore=0
'\0')
    at ../../gcc-mainline-dp/gcc/builtins.c:9768
9768    {


-- 
           Summary: segfault while building libgcc
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: karthikkumar at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33575