The OpenBSD file zic.c causes g++ 4.0.1 to segfault, though plain gcc 4.0.1
does not. The plainest
way to reproduce this is to get the OpenBSD version from
<http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/lib/libc/time/zic.c?rev=1.24&content-
type=text/plain>, but I'll attach a Delta-reduced version of our modified copy.
g++ 3.3.4 rejects it
without crashing, but with "confused by earlier errors, bailing out," so this
is presumably invalid code,
though it seems to be a popular file. (Perhaps I should add OpenBSD to section
I of my article :-)
I'm not sure if this is the same as my two other segfault bugs: Running
the --enable-checking
version under GDB fails to catch the segfault, so I couldn't get a stacktrace.
(I'm trying to build an --
enable-checking=all version, but it's taken more than twenty-four hours so far.)
Session:
74> /opt/gcc401chk/bin/g++ -v
../cpp/bugfiles/GCC_bugfiles/error/105198_zic_min.c
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --enable-checking --prefix=/opt/gcc401chk
--enable-languages=c,c+
+
Thread model: posix
gcc version 4.0.1
/opt/gcc401chk/libexec/gcc/i686-pc-linux-gnu/4.0.1/cc1plus -quiet -v
-D_GNU_SOURCE ../cpp/
bugfiles/GCC_bugfiles/error/105198_zic_min.c -quiet -dumpbase 105198_zic_min.c -
mtune=pentiumpro -auxbase 105198_zic_min -version -o /tmp/ccGy60bj.s
ignoring nonexistent directory
"/opt/gcc401chk/lib/gcc/i686-pc-linux-gnu/4.0.1/../../../../i686-pc-
linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/gcc401chk/lib/gcc/i686-pc-linux-gnu/4.0.1/../../../../include/c++/4.0.1
/opt/gcc401chk/lib/gcc/i686-pc-linux-gnu/4.0.1/../../../../include/c++/4.0.1/i686-pc-linux-gnu
/opt/gcc401chk/lib/gcc/i686-pc-linux-gnu/4.0.1/../../../../include/c++/4.0.1/backward
/usr/local/include
/opt/gcc401chk/include
/opt/gcc401chk/lib/gcc/i686-pc-linux-gnu/4.0.1/include
/usr/include
End of search list.
GNU C++ version 4.0.1 (i686-pc-linux-gnu)
compiled by GNU C version 3.3.4 (pre 3.3.5 20040809).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
../cpp/bugfiles/GCC_bugfiles/error/105198_zic_min.c:1: error: expected
unqualified-id before {
token
../cpp/bugfiles/GCC_bugfiles/error/105198_zic_min.c:31: error: expected
unqualified-id before {
token
../cpp/bugfiles/GCC_bugfiles/error/105198_zic_min.c:36: error: expected
unqualified-id before {
token
../cpp/bugfiles/GCC_bugfiles/error/105198_zic_min.c:37: internal compiler
error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Delta-reduced file:
{
if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
}
while (j != year) {
if (year > j) {
}
}
while (j != month) {
}
{
if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
}
}
for (i = 0; i < zonecount; ++i) {
if (zp->z_nrules == 0) {
if (usestart) {
if (useuntil) {
if (k < 0 || jtime < ktime) {
}
}
if (usestart) {
if (ktime < starttime) {
}
}
}
}
if (usestart) {
}
}
}
{
(timecnt == 1 && attypes[0].at < min_time)) {
}
}
int a;
{
}
register const char * bp;
PalmSource bug 105198.
--
Summary: OpenBSD's zic.c causes g++ but not gcc to segfault
Product: gcc
Version: 4.0.1
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: flash at pobox dot com
CC: gcc-bugs at gcc dot gnu dot org
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=23125
