software-properties-kde froze while updating the package list

[Dima Ryazanov]

I edited the software sources, and was asked to reload the list of packages. When I clicked "Reload", the application froze.
GDB shows that it's waiting for another process to exit:
"python /usr/bin/install-package --update"

Here's the backtrace for that process:

#0 0x00007fa7e51c1388 in *__GI___poll (fds=0x2f48090, nfds=3, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:83
#1 0x00007fa7e257d37c in g_main_context_poll (context=0x2d50080, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2904
#2 g_main_context_iterate (context=0x2d50080, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2586
#3 0x00007fa7e257d6c0 in IA__g_main_context_iteration (context=0x2d50080, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#4 0x00007fa7e3b8c463 in QEventDispatcherGlib::processEvents (this=0x23cf920, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#5 0x00007fa7df7907ee in QGuiEventDispatcherGlib::processEvents (this=0x2f48090, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#6 0x00007fa7e3b61862 in QEventLoop::processEvents (this=<value optimized out>, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qeventloop.cpp:149
#7 0x00007fa7e3b61c3c in QEventLoop::exec (this=0x7fff31c2ee70, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qeventloop.cpp:201
#8 0x00007fa7e3b6597b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#9 0x00007fa7e0641a56 in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#10 0x00000000004a290d in call_function (f=0x23c20b0, throwflag=<value optimized out>) at ../Python/ceval.c:3706
#11 PyEval_EvalFrameEx (f=0x23c20b0, throwflag=<value optimized out>) at ../Python/ceval.c:2389
#12 0x00000000004a40e0 in PyEval_EvalCodeEx (co=0x7fa7e6039648, globals=<value optimized out>, locals=<value optimized out>, args=0x0,
    argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:2968
#13 0x00000000004a41b2 in PyEval_EvalCode (co=0x2f48090, globals=0x3, locals=0xffffffffffffffff) at ../Python/ceval.c:522
#14 0x00000000004c33a0 in run_mod (fp=0x239a640, filename=<value optimized out>, start=<value optimized out>, globals=<value optimized out>, locals=0x2348270,
    closeit=1, flags=0x7fff31c2f2b0) at ../Python/pythonrun.c:1335
#15 PyRun_FileExFlags (fp=0x239a640, filename=<value optimized out>, start=<value optimized out>, globals=<value optimized out>, locals=0x2348270, closeit=1,
    flags=0x7fff31c2f2b0) at ../Python/pythonrun.c:1321
#16 0x00000000004c3564 in PyRun_SimpleFileExFlags (fp=<value optimized out>, filename=0x7fff31c2fe68 "/usr/bin/install-package", closeit=1, flags=0x7fff31c2f2b0)
    at ../Python/pythonrun.c:931
#17 0x0000000000418ab7 in Py_Main (argc=-436072320, argv=<value optimized out>) at ../Modules/main.c:599
#18 0x00007fa7e510cabd in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>,
    fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff31c2f3c8) at libc-start.c:220
#19 0x0000000000417ca9 in _start () at ../sysdeps/x86_64/elf/start.S:113

In any case, a GUI app should never block the UI while performing a slow action - especially waiting for another process to exit.

ProblemType: Bug
Architecture: amd64
Date: Tue Feb 16 15:41:27 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: software-properties-kde 0.75.4
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: software-properties
Uname: Linux 2.6.31-19-generic x86_64

[Dima Ryazanov (dima-gmail)]

Also, here's the backtrace for software-properties-kde itself:

#0 0x00007f32cbf55cdd in __libc_waitpid (pid=4584, stat_loc=<value optimized out>, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:41
#1 0x0000000000507d42 in posix_waitpid (self=<value optimized out>, args=<value optimized out>) at ../Modules/posixmodule.c:5899
#2 0x00000000004a290d in call_function (f=0x2569020, throwflag=<value optimized out>) at ../Python/ceval.c:3706
#3 PyEval_EvalFrameEx (f=0x2569020, throwflag=<value optimized out>) at ../Python/ceval.c:2389
#4 0x00000000004a2e47 in fast_function (f=0x1fb8af0, throwflag=<value optimized out>) at ../Python/ceval.c:3792
#5 call_function (f=0x1fb8af0, throwflag=<value optimized out>) at ../Python/ceval.c:3727
#6 PyEval_EvalFrameEx (f=0x1fb8af0, throwflag=<value optimized out>) at ../Python/ceval.c:2389
#7 0x00000000004a40e0 in PyEval_EvalCodeEx (co=0x166b918, globals=<value optimized out>, locals=<value optimized out>, args=0x0, argcount=<value optimized out>,
    kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:2968
#8 0x00000000004a245f in fast_function (f=0x26bee40, throwflag=<value optimized out>) at ../Python/ceval.c:3802
#9 call_function (f=0x26bee40, throwflag=<value optimized out>) at ../Python/ceval.c:3727
#10 PyEval_EvalFrameEx (f=0x26bee40, throwflag=<value optimized out>) at ../Python/ceval.c:2389
#11 0x00000000004a40e0 in PyEval_EvalCodeEx (co=0x164e6c0, globals=<value optimized out>, locals=<value optimized out>, args=0x1, argcount=<value optimized out>,
    kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:2968
#12 0x000000000052be30 in function_call (func=0x1efd050, arg=0x160c710, kw=0x0) at ../Objects/funcobject.c:524
#13 0x000000000041d6e7 in PyObject_Call (func=0x1efd050, arg=0x7fff71b18644, kw=0x0) at ../Objects/abstract.c:2492
#14 0x00000000004254ff in instancemethod_call (func=0x1efd050, arg=0x160c710, kw=0x0) at ../Objects/classobject.c:2579
#15 0x000000000041d6e7 in PyObject_Call (func=0x1757370, arg=0x7fff71b18644, kw=0x0) at ../Objects/abstract.c:2492
#16 0x000000000049c623 in PyEval_CallObjectWithKeywords (func=0x1757370, arg=0x7f32cc311050, kw=0x0) at ../Python/ceval.c:3575
#17 0x00007f32c8adeb...

[Jonathan Thomas (echidnaman)]

That's the expected behavior. It launches install-package to update the package list, and then will close both install-package and itself once its done.

[Dima Ryazanov (dima-gmail)]

How is this the expected behavior?

As I said, the application froze, completely. I gave up after 5 min. or so. "apt-get update", on the other hand, completes in about a second.

[Jonathan Thomas (echidnaman)]

If you had said install-package never came up, then that would have been something.

[Dima Ryazanov (dima-gmail)]

(Oh, sorry... I had never seen it work, so I didn't know something was supposed to come up.)

[Jonathan Thomas (echidnaman)]

The install-package program has been replaced by the much more robust qapt-batch utility for Kubuntu 10.10. Unfortunately this means that install-package is now unmaintained. (QApt Batch shouldn't be affected by this bug, though)