Public bug reported:
Sending SIGTERM to unity8 causes this slightly concerning error message
to be printed:
QThread: Destroyed while thread is still running
Going a quick dig, I see it came from DashCommunicator:
(gdb) break src/corelib/thread/qthread.cpp:417
Breakpoint 1 at 0x7fafce6bd935: file thread/qthread.cpp, line 417.
(gdb) cont
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x00007fafcddb98dd in poll () at ../sysdeps/unix/syscall-template.S:81
81 in ../sysdeps/unix/syscall-template.S
(gdb) signal SIGTERM
Continuing with signal SIGTERM.
Breakpoint 1, QThread::~QThread (this=0x203d1f0, __in_chrg=<optimized out>) at
thread/qthread.cpp:417
417 thread/qthread.cpp: No such file or directory.
(gdb) t
[Current thread is 1 (Thread 0x7fafcfcaf800 (LWP 19100))]
(gdb) info threads
Id Target Id Frame
23 Thread 0x7fafc178b700 (LWP 19101) "unity8" syscall () at
../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
22 Thread 0x7fafc0f8a700 (LWP 19102) "unity8" syscall () at
../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
21 Thread 0x7fafbbfff700 (LWP 19103) "MirServerThread" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
20 Thread 0x7fafbb7fe700 (LWP 19104) "RPC Thread" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
19 Thread 0x7fafb951d700 (LWP 19105) "MirServerThread"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
18 Thread 0x7fafb8ac0700 (LWP 19106) "Input dispatch" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
17 Thread 0x7fafaa0db700 (LWP 19107) "Mir/Snapshot"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
16 Thread 0x7fafa98da700 (LWP 19108) "Mir/IPC" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
15 Thread 0x7fafa90d9700 (LWP 19109) "Mir/IPC" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
14 Thread 0x7faf9db6d700 (LWP 19110) "QQmlThread" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
13 Thread 0x7faf8de65700 (LWP 19111) "gmain" 0x00007fafcddb98dd in poll ()
at ../sysdeps/unix/syscall-template.S:81
12 Thread 0x7faf85664700 (LWP 19112) "gdbus" 0x00007fafcbceea91 in
g_variant_type_info_check (
info=info@entry=0x7fafcbd504b0 <g_variant_type_info_basic_table+368>,
container_class=container_class@entry=0 '\000')
at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gvarianttypeinfo.c:158
11 Thread 0x7faf8d3ff700 (LWP 19113) "dconf worker" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
10 Thread 0x7faf7eba6700 (LWP 19114) "dashCommunicato" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
9 Thread 0x7faf73fff700 (LWP 19115) "unity8" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
8 Thread 0x7faf735f9700 (LWP 19118) "unity8"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
7 Thread 0x7faf71dd9700 (LWP 19119) "Qt bearer threa" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
6 Thread 0x7faf63fff700 (LWP 19121) "QQuickPixmapRea" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
5 Thread 0x7faf615ad700 (LWP 19123) "Thread (pooled)"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
4 Thread 0x7faf5ffa0700 (LWP 19124) "QThread" 0x00007fafcddb98dd in poll
() at ../sysdeps/unix/syscall-template.S:81
3 Thread 0x7faf5f79f700 (LWP 19125) "QProcessManager" 0x00007fafcddbb743
in select () at ../sysdeps/unix/syscall-template.S:81
2 Thread 0x7faf5ef5e700 (LWP 19135) "QSGRenderThread"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
* 1 Thread 0x7fafcfcaf800 (LWP 19100) "unity8" QThread::~QThread
(this=0x203d1f0, __in_chrg=<optimized out>)
at thread/qthread.cpp:417
(gdb) bt
#0 0x00007fafce6bd935 in QThread::~QThread() (this=0x203d1f0,
__in_chrg=<optimized out>) at thread/qthread.cpp:417
#1 0x00007faf845e5ef2 in () at
/usr/lib/x86_64-linux-gnu/unity8/qml/Unity/DashCommunicator/libDashCommunicator-qml.so
#2 0x00007fafce8d1d2b in QObjectPrivate::deleteChildren()
(this=this@entry=0x2033f40) at kernel/qobject.cpp:1950
#3 0x00007fafce8db620 in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1030
#4 0x00007fafcf5b52bd in QQuickItem::~QQuickItem() (this=0x2033f10,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2223
#5 0x00007fafcf5cf7c6 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x2033f10, __in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#6 0x00007fafcf5cf7c6 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x2033f10, __in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#7 0x00007fafce8d1d2b in QObjectPrivate::deleteChildren()
(this=this@entry=0x2017c10) at kernel/qobject.cpp:1950
#8 0x00007fafce8db620 in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1030
#9 0x00007fafcf5b52bd in QQuickItem::~QQuickItem() (this=0x2015e10,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2223
#10 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at items/qquickrectangle_p.h:128
#11 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#12 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#13 0x00007fafcf66b1aa in QQuickView::~QQuickView() (this=0x1f8ff70,
__in_chrg=<optimized out>) at items/qquickview.cpp:225
#14 0x000000000040fade in ()
#15 0x000000000040a123 in ()
#16 0x0000000000406374 in ()
#17 0x00007fafcdcdea40 in __libc_start_main (main=
0x4062f0, argc=1, argv=0x7ffe2523b688, init=<optimized out>,
fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe2523b678) at
libc-start.c:289
#18 0x0000000000406419 in _start ()
** Affects: unity8 (Ubuntu)
Importance: Low
Status: New
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https://bugs.launchpad.net/bugs/1508485
Title:
"QThread: Destroyed while thread is still running" printed on shutdown
Status in unity8 package in Ubuntu:
New
Bug description:
Sending SIGTERM to unity8 causes this slightly concerning error
message to be printed:
QThread: Destroyed while thread is still running
Going a quick dig, I see it came from DashCommunicator:
(gdb) break src/corelib/thread/qthread.cpp:417
Breakpoint 1 at 0x7fafce6bd935: file thread/qthread.cpp, line 417.
(gdb) cont
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x00007fafcddb98dd in poll () at ../sysdeps/unix/syscall-template.S:81
81 in ../sysdeps/unix/syscall-template.S
(gdb) signal SIGTERM
Continuing with signal SIGTERM.
Breakpoint 1, QThread::~QThread (this=0x203d1f0, __in_chrg=<optimized out>)
at thread/qthread.cpp:417
417 thread/qthread.cpp: No such file or directory.
(gdb) t
[Current thread is 1 (Thread 0x7fafcfcaf800 (LWP 19100))]
(gdb) info threads
Id Target Id Frame
23 Thread 0x7fafc178b700 (LWP 19101) "unity8" syscall () at
../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
22 Thread 0x7fafc0f8a700 (LWP 19102) "unity8" syscall () at
../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
21 Thread 0x7fafbbfff700 (LWP 19103) "MirServerThread" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
20 Thread 0x7fafbb7fe700 (LWP 19104) "RPC Thread" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
19 Thread 0x7fafb951d700 (LWP 19105) "MirServerThread"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
18 Thread 0x7fafb8ac0700 (LWP 19106) "Input dispatch" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
17 Thread 0x7fafaa0db700 (LWP 19107) "Mir/Snapshot"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
16 Thread 0x7fafa98da700 (LWP 19108) "Mir/IPC" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
15 Thread 0x7fafa90d9700 (LWP 19109) "Mir/IPC" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
14 Thread 0x7faf9db6d700 (LWP 19110) "QQmlThread" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
13 Thread 0x7faf8de65700 (LWP 19111) "gmain" 0x00007fafcddb98dd in poll
() at ../sysdeps/unix/syscall-template.S:81
12 Thread 0x7faf85664700 (LWP 19112) "gdbus" 0x00007fafcbceea91 in
g_variant_type_info_check (
info=info@entry=0x7fafcbd504b0 <g_variant_type_info_basic_table+368>,
container_class=container_class@entry=0 '\000')
at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gvarianttypeinfo.c:158
11 Thread 0x7faf8d3ff700 (LWP 19113) "dconf worker" 0x00007fafcddb98dd in
poll () at ../sysdeps/unix/syscall-template.S:81
10 Thread 0x7faf7eba6700 (LWP 19114) "dashCommunicato" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
9 Thread 0x7faf73fff700 (LWP 19115) "unity8" 0x00007fafcddc54f3 in
epoll_wait () at ../sysdeps/unix/syscall-template.S:81
8 Thread 0x7faf735f9700 (LWP 19118) "unity8"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
7 Thread 0x7faf71dd9700 (LWP 19119) "Qt bearer threa" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
6 Thread 0x7faf63fff700 (LWP 19121) "QQuickPixmapRea" 0x00007fafcddb98dd
in poll () at ../sysdeps/unix/syscall-template.S:81
5 Thread 0x7faf615ad700 (LWP 19123) "Thread (pooled)"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
4 Thread 0x7faf5ffa0700 (LWP 19124) "QThread" 0x00007fafcddb98dd in poll
() at ../sysdeps/unix/syscall-template.S:81
3 Thread 0x7faf5f79f700 (LWP 19125) "QProcessManager" 0x00007fafcddbb743
in select () at ../sysdeps/unix/syscall-template.S:81
2 Thread 0x7faf5ef5e700 (LWP 19135) "QSGRenderThread"
pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
* 1 Thread 0x7fafcfcaf800 (LWP 19100) "unity8" QThread::~QThread
(this=0x203d1f0, __in_chrg=<optimized out>)
at thread/qthread.cpp:417
(gdb) bt
#0 0x00007fafce6bd935 in QThread::~QThread() (this=0x203d1f0,
__in_chrg=<optimized out>) at thread/qthread.cpp:417
#1 0x00007faf845e5ef2 in () at
/usr/lib/x86_64-linux-gnu/unity8/qml/Unity/DashCommunicator/libDashCommunicator-qml.so
#2 0x00007fafce8d1d2b in QObjectPrivate::deleteChildren()
(this=this@entry=0x2033f40) at kernel/qobject.cpp:1950
#3 0x00007fafce8db620 in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1030
#4 0x00007fafcf5b52bd in QQuickItem::~QQuickItem() (this=0x2033f10,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2223
#5 0x00007fafcf5cf7c6 in
QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement() (this=0x2033f10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#6 0x00007fafcf5cf7c6 in
QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement() (this=0x2033f10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#7 0x00007fafce8d1d2b in QObjectPrivate::deleteChildren()
(this=this@entry=0x2017c10) at kernel/qobject.cpp:1950
#8 0x00007fafce8db620 in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1030
#9 0x00007fafcf5b52bd in QQuickItem::~QQuickItem() (this=0x2015e10,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2223
#10 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at items/qquickrectangle_p.h:128
#11 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#12 0x00007fafcf5cf86e in
QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() (this=0x2015e10,
__in_chrg=<optimized out>)
at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:98
#13 0x00007fafcf66b1aa in QQuickView::~QQuickView() (this=0x1f8ff70,
__in_chrg=<optimized out>) at items/qquickview.cpp:225
#14 0x000000000040fade in ()
#15 0x000000000040a123 in ()
#16 0x0000000000406374 in ()
#17 0x00007fafcdcdea40 in __libc_start_main (main=
0x4062f0, argc=1, argv=0x7ffe2523b688, init=<optimized out>,
fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe2523b678) at
libc-start.c:289
#18 0x0000000000406419 in _start ()
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