[GRASS-dev] Heisenbug in v.out.ascii with column parameter: segfault

Markus Neteler neteler at osgeo.org
Wed Sep 9 03:37:43 EDT 2009


I get a Heisenbug [1] when exporting points from v.out.ascii with attributes
(Scientific Linux, 64bit):

GRASS 6.4.0svn (patUTM32):~ > v.out.ascii phd_area_main_cities column=name
Segmentation fault

GRASS 6.4.0svn (patUTM32):~ > gdb v.out.ascii
GNU gdb Red Hat Linux (6.5-37.el5_2.2rh)
This GDB was configured as "x86_64-redhat-linux-gnu"...(no debugging
symbols found)
Using host libthread_db library "/lib64/libthread_db.so.1".

(gdb) r phd_area_main_cities column=name
Starting program:
phd_area_main_cities column=name
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 47548720613104 (LWP 7517)]
(no debugging symbols found)
[Detaching after fork from child process 7520. (Try `set detach-on-fork off'.)]
680631.89931785|5152080.37972013|2|Bolzano - Bozen
Program exited normally.

GRASS 6.4.0svn (patUTM32):~ > v.out.ascii phd_area_main_cities column=name
Segmentation fault

Yes, I didn't compile with -g because it is my production machine but
since it works in GDB...

Any idea how to debug this problem?


[1] http://en.wikipedia.org/wiki/Unusual_software_bug#Heisenbug

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