Red Hat Bugzilla – Bug 136884
gcc segfaults due to ICE
Last modified: 2007-11-30 17:10:52 EST
Description of problem: gcc segfaults internally while compiling C file braille.c in brltty-3.2-5.src.rpm Version-Release number of selected component (if applicable): gcc-3.2.3-34 How reproducible: always Steps to Reproduce: 1. bhc dist-fc3-HEAD devserv:~havill/brltty-3.2-5.src.rpm Actual results: make[2]: Entering directory `/usr/src/build/474312-x86_64/BUILD/brltty-3.2/Drivers/LogText' x86_64-redhat-linux-gcc -O2 -g -pipe -m64 -Wall -I. -I../../ -I. -I../../ -D_POSIX_C_SOURCE=2 -D_BSD_SOURCE -D_XOPEN_SOURCE -DHAVE_CONFIG_H -fPIC '-DBRLDRIVER="lt"' '-DBRLHELP="/etc/brltty/brltty-lt.hlp"' -c ./braille.c ./braille.c: In function `sendData': ./braille.c:216: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://bugzilla.redhat.com/bugzilla> for instructions. Preprocessed source stored into /tmp/ccRJJ5YP.out file, please attach this to your bugreport. Additional info: Not encountering problems on other archs
Created attachment 105674 [details] C preprocessor output
Simplified testcase: /* { dg-do compile } */ /* { dg-options "-O2 -g" } */ static void foo (unsigned char x) { unsigned char a[5 + x]; } void bar (void) { foo (80); } Works with both gcc 3.3.4 and 4.0.0.
http://gcc.gnu.org/ml/gcc-patches/2004-10/msg01995.html Not sure how often it triggers though. It has been introduced on 2004-10-13 in CVS (i.e. only in gcc-3.4.2-6 built on Oct, 18th), so we probably haven't built enough code to see whether this is something exceptional or happens more often (in which case we should put it into FC3).
Should be fixed in gcc-3.4.2-6.fc3.