Uniy8 crashed when creating a wireless connection with an access point

[Ricardo Salveti]

current build number: 11
device name: mako
channel: ubuntu-touch/vivid-proposed
last update: 2014-11-07 19:25:24
version version: 11
version ubuntu: 20141106.1
version device: 20141106
version custom: 20141106.1

Had system-settings opened in order to verify for updates, but noticed that I didn't have any valid wireless connection, so when I tried to connect with my access point, unity8 crashed completely. This happened after adding the password and hitting 'Connect'.

[Ricardo Salveti (rsalveti)]

The stack trace, it seems to be actually a bug on media-hub/dbus-cpp.

#0 __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
44 ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S: No such file or directory.
(gdb) bt full
#0 __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
No locals.
#1 0xb6154e5e in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        _a1 = 0
        _a3tmp = 6
        _a1tmp = 0
        _a3 = 6
        _nametmp = 268
        _a2tmp = 3747
        _a2 = 3747
        _name = 268
        _sys_result = <optimized out>
        pd = 0xb6f77000
        pid = 0
        selftid = 3747
#2 0xb6155b4e in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {1, 3055655487, 3055655416, 3055255819, 3055022821, 3069680328, 3069669376, 3069680504, 3069669376, 3055841280, 729240, 0, 1, 33527928, 40034132, 3069594101, 3069680504, 1, 5,
              0, 3198701360, 3054717864, 1, 3055656472, 1, 36773876, 3056202129, 40338480, 3198701360, 3069612528, 40338360, 3069670608}}, sa_flags = 1, sa_restorer = 0x0}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3 0xb62920fc in __gnu_cxx::__verbose_terminate_handler () at ../../../../src/libstdc++-v3/libsupc++/vterminate.cc:84
        w = <optimized out>
        exc = @0x0: <error reading variable>
        name = <optimized out>
        terminating = true
        t = <optimized out>
#4 0xb6290920 in std::rethrow_exception (ep=...) at ../../../../src/libstdc++-v3/libsupc++/eh_ptr.cc:246
        obj = <optimized out>
        dep = 0x2678430
#5 0xb6290b96 in __GXX_INIT_PRIMARY_EXCEPTION_CLASS (c=0xb629091f <std::rethrow_exception(std::__exception_ptr::exception_ptr)+86> "b\204\370#\020\204\370$\020\204\370% \204\370& \340`(F\374\367\220\350(F\373\367\200\352\375\367", <incomplete sequence \352>)
    at ../../../../src/libstdc++-v3/libsupc++/unwind-cxx.h:271
No locals.
#6 __cxxabiv1::__cxa_throw (obj=0xb6290977 <std::set_terminate(void (*)())+30>, tinfo=0xb62f7260 <typeinfo for std::runtime_error>, dest=0xb629f191 <std::out_of_range::~out_of_range()+4>) at ../../../../src/libstdc++-v3/libsupc++/eh_throw.cc:76
        globals = <optimized out>
#7 0xad96371e in core::dbus::Bus::remove_match (this=<optimized out>, rule=...) at /build/buildd/dbus-cpp-4.2.0+15.04.20141105/src/core/dbus/bus.cpp:317
        se = {d = std::unique_ptr<core::dbus::Error::Private> containing 0x29c85f8}
#8 0xad96d3d2 in core::dbus::Service::remove_match (this=this@entry=0x1ff9878, rule=...) at /build/buildd/dbus-cpp-4.2.0+15.04.20141105/src/core/dbus/service.cpp:82
No locals.
#9 0xa7bd1852 in remove_match (rule=..., this=<optimized out>) at /usr/include/core/dbus/impl/object.h:331
No locals.
#10 ~Signal (this=0x25635f0, __in_chrg=<optimized out>) at /usr/include/core/dbus/impl/signal.h:35
No locals.
#11 std::_Sp_counted_ptr<core::dbus::Signal<mpris::Player::Signals::EndOfStream, void>*, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=<optimized out>) at /usr/include/c++/4.9/bits/shared_ptr_base.h:373
No locals.
#12 0xa7bafb92 in std:...

[Thomas Voß (thomas-voss)]

Thanks for the report. The issue arises when trying to communicate to the dbus daemon in a dtor, and I can easily make that call exception safe. However, that specific call failing is concerning, and we should further investigate why removing a match rule apparently fails (probably times out).

[Launchpad Janitor (janitor)]

This bug was fixed in the package media-hub - 2.0.0+15.04.20141110.1-0ubuntu1

---------------
media-hub (2.0.0+15.04.20141110.1-0ubuntu1) vivid; urgency=low

  [ thomas-voss ]
  * Bump build dependency on dbus-cpp to pull in exception safe dtor.
    (LP: #1390618)
 -- Ubuntu daily release <email address hidden> Mon, 10 Nov 2014 11:53:11 +0000