[mythtv-commits] Ticket #9378: [PATCH] libmythdb: Qt assertion failure in MythSystemReaper::run

[MythTV]

#9378: [PATCH] libmythdb: Qt assertion failure in MythSystemReaper::run
-------------------------------------------------+-------------------------
 Reporter:  Lawrence Rust <lvr@…>                |          Owner:  beirdo
     Type:  Patch - Bug Fix                      |         Status:
 Priority:  minor                                |  assigned
Component:  MythTV - General                     |      Milestone:  unknown
 Severity:  medium                               |        Version:
 Keywords:  assertion 171 libmythdb              |  0.24-fixes
  MythSystemReaper                               |     Resolution:
                                                 |  Ticket locked:  0
-------------------------------------------------+-------------------------
Description changed by mdean:

Old description:

> Running a Linux debug build of mythfrontend fixes/0.24 with a debug build
> of Qt 4.7.0 causes an assertion failure in MythSystemReaper::run line
> 171.  This is the gdb traceback:
>
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0xb0effb70 (LWP 16613)]
> 0xb7fe2424 in __kernel_vsyscall ()
>
> Thread 5 (Thread 0xb0effb70 (LWP 16613)):
> #0  0xb7fe2424 in __kernel_vsyscall ()
> No symbol table info available.
> #1  0xb2f5b651 in raise () from /lib/tls/i686/cmov/libc.so.6
> No symbol table info available.
> #2  0xb2f5ea82 in abort () from /lib/tls/i686/cmov/libc.so.6
> No symbol table info available.
> #3  0xb328273f in qt_message_output (msgType=QtFatalMsg, buf=0x82e2890
> "ASSERT failure in QMutex::unlock(): \"A mutex must be unlocked in the
> same thread that locked it.\", file thread/qmutex.cpp, line 370") at
> global/qglobal.cpp:2259
> No locals.
> #4  0xb328292c in qt_message (msgType=QtFatalMsg, msg=0xb34089b0 "ASSERT
> failure in %s: \"%s\", file %s, line %d", ap=0xb0eff154
> "\244\235@\263ĝ@\263d\235@\263r\001") at global/qglobal.cpp:2305
>         buf = {static shared_null = {ref = {_q_value = 1}, alloc = 0,
> size = 0, data = 0xb34d7604 "", array = ""}, static shared_empty = {ref =
> {_q_value = 2}, alloc = 0, size = 0, data = 0xb34d7618 "", array = ""}, d
> = 0x82e2880}
> #5  0xb328298d in qFatal (msg=0xb34089b0 "ASSERT failure in %s: \"%s\",
> file %s, line %d") at global/qglobal.cpp:2488
> No locals.
> #6  0xb32829cb in qt_assert_x (where=0xb3409da4 "QMutex::unlock()",
> what=0xb3409dc4 "A mutex must be unlocked in the same thread that locked
> it.", file=0xb3409d64 "thread/qmutex.cpp", line=370) at
> global/qglobal.cpp:2012
> No locals.
> #7  0xb3285ae9 in QMutex::unlock (this=0x82e2008) at
> thread/qmutex.cpp:370
> No locals.
> #8  0xb697d439 in MythSystemReaper::run (this=0x82e2b08) at
> mythsystem.cpp:171
>         i = {i = 0x82e0920}
>         pidData = 0x82e2008
>         pid = 16612
>         count = 1
>         status = 0
>         now = 1292441874
>         next = {i = 0x82e0920}
> #9  0xb328c356 in QThreadPrivate::start (arg=0x82e2b08) at
> thread/qthread_unix.cpp:266
>         thr = 0x82e2b08
>         data = 0x82e1678
> #10 0xb31cc96e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
> No symbol table info available.
> #11 0xb2ffea4e in clone () from /lib/tls/i686/cmov/libc.so.6
> No symbol table info available.
>
> The attached patch fixes this

New description:

 Running a Linux debug build of mythfrontend fixes/0.24 with a debug build
 of Qt 4.7.0 causes an assertion failure in MythSystemReaper::run line 171.
 This is the gdb traceback:

 [moved to attachment, gdb.txt]

 The attached patch fixes this

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Ticket URL: <http://code.mythtv.org/trac/ticket/9378#comment:2>
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