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Bug 136884

Summary: gcc segfaults due to ICE
Product: [Fedora] Fedora Reporter: Eido Inoue <havill>
Component: gccAssignee: Jakub Jelinek <jakub>
Status: CLOSED RAWHIDE QA Contact:
Severity: high Docs Contact:
Priority: medium    
Version: rawhide   
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: 3.4.2-6.fc3 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2004-10-26 17:29:29 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 116244    
Attachments:
Description Flags
C preprocessor output none

Description Eido Inoue 2004-10-22 20:31:19 UTC 
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
Comment 1 Eido Inoue 2004-10-22 20:41:23 UTC 
Created attachment 105674 [details]
C preprocessor output
Comment 2 Jakub Jelinek 2004-10-23 17:09:01 UTC 
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.
Comment 3 Jakub Jelinek 2004-10-23 21:58:02 UTC 
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).
Comment 4 Jakub Jelinek 2004-10-26 17:29:29 UTC 
Should be fixed in gcc-3.4.2-6.fc3.