[GRASS-dev] [bug #5341] (grass) v.db.select: segfault

Request Tracker grass-bugs at intevation.de
Mon Nov 27 05:47:45 EST 2006

this bug's URL: http://intevation.de/rt/webrt?serial_num=5341

Subject: v.db.select: segfault

Under some circumstances v.db.select segfaults. I can't find a pattern, but I
created a reproducible test case.

1. Download the location (2 KB)
http://kufaya.googlepages.com/vdbselect_segfault.tar.bz2. There is a vector
map 'test', in the 'test' mapset.

2. v.db.select map=test where="MAPS_COVER='built up'"
Segmentation fault

The backtrace:

(gdb) bt
#0  0xb7662943 in free () from /lib/tls/i686/cmov/libc.so.6
#1  0xb7663a86 in realloc () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7eff069 in db_realloc (s=0x38, n=1293960530) at alloc.c:76
#3  0xb7f02e12 in db_enlarge_string (x=0xbff49838, len=134832280)
    at string.c:133
#4  0xb7f0307f in db_append_string (x=0xbff49838,
    s=0x80960a0 " WHERE MAPS_COVER='built up'") at string.c:220
#5  0x080494ee in main (argc=3, argv=0x80960a0) at main.c:122

I used to have this error occassionaly in recent months at random. This time I
finally pinned down a good test case. Please please fix it.


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