Beginner tutorials: segmentation fault with rospack depends1
I have created a package as described under /ROS/Tutorials/CreatingPackage, and everything seems ok.
However, I get a segmentation fault when I try to see the dependencies with
rospack depends1 beginner_tutorials
Has anyone else encountered this problem? What might be the cause?
My setup: Ubuntu 12.04 32 bit, ROS Groovy.
EDIT: Debug trace, obtained by following @IsaacSaito's suggestion:
(gdb) run depends1 beginner_tutorials
Starting program: /opt/ros/groovy/bin/rospack depends1 beginner_tutorials
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0xb7a23112 in PyObject_IsTrue () from /usr/lib/libpython2.7.so.1.0
And the contents of the single file in /var/crash:
PythonArgs: ['/usr/bin/jockey-text', '-C', '--no-dbus', '-k', '3.2.0-29-generic-pae']
Traceback:
Traceback (most recent call last):
File "/usr/bin/jockey-text", line 128, in <module>
sys.exit(u.run())
File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 452, in run
if self.check_composite():
File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 574, in check_composite
self.set_handler_enable(h_id, 'enable', self.argv_options.confirm)
File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 618, in set_handler_enable
i = convert_dbus_exceptions(self.backend().handler_info, handler_id)
File "/usr/lib/python2.7/dist-packages/jockey/backend.py", line 98, in convert_dbus_exceptions
return fn(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/jockey/backend.py", line 264, in handler_info
'recommended': str(h.recommended()),
File "/usr/share/jockey/handlers/nvidia.py", line 130, in recommended
nd = NvidiaDetection()
File "/usr/lib/python2.7/dist-packages/NvidiaDetector/nvidiadetector.py", line 68, in __init__
self.getData()
File "/usr/lib/python2.7/dist-packages/NvidiaDetector/nvidiadetector.py", line 149, in getData
driver_version = self.__get_value_from_name(stripped_package_name)
File "/usr/lib/python2.7/dist-packages/NvidiaDetector/nvidiadetector.py", line 87, in __get_value_from_name
v = int(name)
ValueError: invalid literal for int() with base 10: 'experimental-304'
UserGroups:
So it seems some python module chokes when detecting my Nvidia graphic card. I have a GeForce GT 630M, if that is relevant, and I have not installed yet any additional drivers except what Ubuntu installed by itself. I will try to see if updating the drivers will help, but seems like a weird dependency for ROS to get stuck on.
EDIT 2: Seems to be a bug in Ubuntu 12.04 and unrelated to ROS itself: bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1070795
EDIT 3: My conclusion in Edit 2 was incorrect, I had made a mistake in checking the creation date for the /var/crash file. Nothing is generated there when I run rospack depends1. The (hopefully correct) trace now! Yes, kind of a Linux noob here... :-)
(gdb) bt
#0 0xb7a23112 in PyObject_IsTrue () from /usr/lib/libpython2.7.so.1.0
#1 0xb7fabc40 in rospack::Rosstackage::isSysPackage(std::string const&) ()
from /opt/ros/groovy/lib/librospack.so
#2 0xb7fac8ee in rospack::Rosstackage::computeDepsInternal(rospack::Stackage*, bool, std::string const&) () from /opt/ros/groovy/lib/librospack.so
#3 0xb7faccb6 in rospack::Rosstackage::computeDeps(rospack::Stackage*, bool)
() from /opt/ros/groovy/lib/librospack.so
#4 0xb7fac8b9 ...
Can you share debug trace? For ex., "$ gdb rospack" then "run depends1 beginner_tutorials"
@IsaacSaito I will post the trace when I get home today, thanks!
@IsaacSaito I've posted my trace, seems like a python module gets stuck while detecting my Nvidia gfx card. Still not clear what to do.
Also, are you sure the crash content you posted is associated with rospack? It doesn't matter if the source of bug resides in ROS or not as long as you face an error, but it seems strange to me that rospack with beginner_tutorials kicks graphic card...
On gdb's console, run bt after Segmentation fault occurs so that we can see backtrace. What you pasted isn't yet really a backtrace ;)
@IsaacSaito Sorry, Linux noob-ish user here...the Windows debug landscape is different :D Posted what is hopefully complete debug trace now.
What happens with other packages? for example, "
$ rospack depends1 roscpp"? Also if you have other custom pkgs (= pkgs that you created) what happens with them?@IsaacSaito As far as I can recall, it gives me a segfault even for existing ros packages, but I'll try again to make sure. I have no other custom packages -- this happened while creating my first package as part of the beginner tutorial!