Simple Player Segmentation Fault while creating VlcInstance()

[NicolaBernini]

Hi everybody,

I got a problem while trying the Simple Player example

I’m using

• Linux = Ubuntu 14.04 (64-bit)
• Qt = ver 5.7
• VLC-Qt = Latest (git cloned current version by https://github.com/vlc-qt/vlc-qt and succesfully built following the instructions)
• LibVLC version 0x020200 (automatically detected by VLC-Qt CMake)

I have been able to build the Simple-Player example using CMake but when I run it I get a Segmentation Fault on the following line

_instance = new VlcInstance(VlcCommon::args(), this);
https://github.com/vlc-qt/examples/blob/master/simple-player/src/SimplePlayer.cpp#L27

Please find the gdb bt result below

Any idea ?

Thank You

Program received signal SIGSEGV, Segmentation fault.
0x00007fffe4532dfc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
(gdb) bt
#0  0x00007fffe4532dfc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#1  0x00007ffff7dea13a in call_init (l=<optimized out>, argc=argc@entry=1, argv=argv@entry=0x7fffffffe398, env=env@entry=0x671120) at dl-init.c:78
#2  0x00007ffff7dea223 in call_init (env=<optimized out>, argv=<optimized out>, argc=<optimized out>, l=<optimized out>) at dl-init.c:36
#3  _dl_init (main_map=main_map@entry=0x832720, argc=1, argv=0x7fffffffe398, env=0x671120) at dl-init.c:126
#4  0x00007ffff7deec70 in dl_open_worker (a=a@entry=0x7fffffffd7e8) at dl-open.c:577
#5  0x00007ffff7de9ff4 in _dl_catch_error (objname=objname@entry=0x7fffffffd7d8, errstring=errstring@entry=0x7fffffffd7e0, 
    mallocedp=mallocedp@entry=0x7fffffffd7d0, operate=operate@entry=0x7ffff7dee9a0 <dl_open_worker>, args=args@entry=0x7fffffffd7e8) at dl-error.c:187
#6  0x00007ffff7dee3bb in _dl_open (file=0x81ee10 "/usr/lib/vlc/plugins/gui/libqt4_plugin.so", mode=-2147483647, caller_dlopen=<optimized out>, 
    nsid=-2, argc=1, argv=0x7fffffffe398, env=0x671120) at dl-open.c:661
#7  0x00007ffff2b8d02b in dlopen_doit (a=a@entry=0x7fffffffda00) at dlopen.c:66
#8  0x00007ffff7de9ff4 in _dl_catch_error (objname=0x62b560, errstring=0x62b568, mallocedp=0x62b558, operate=0x7ffff2b8cfd0 <dlopen_doit>, 
    args=0x7fffffffda00) at dl-error.c:187
#9  0x00007ffff2b8d62d in _dlerror_run (operate=operate@entry=0x7ffff2b8cfd0 <dlopen_doit>, args=args@entry=0x7fffffffda00) at dlerror.c:163
#10 0x00007ffff2b8d0c1 in __dlopen (file=<optimized out>, mode=<optimized out>) at dlopen.c:87
#11 0x00007ffff20022ef in ?? () from /usr/lib/libvlccore.so.8
#12 0x00007ffff1fe789b in ?? () from /usr/lib/libvlccore.so.8
#13 0x00007ffff1fe7b7b in ?? () from /usr/lib/libvlccore.so.8
#14 0x00007ffff1fe7ac4 in ?? () from /usr/lib/libvlccore.so.8
#15 0x00007ffff1fe8029 in ?? () from /usr/lib/libvlccore.so.8
#16 0x00007ffff1fe8567 in ?? () from /usr/lib/libvlccore.so.8
#17 0x00007ffff1f6f29d in libvlc_InternalInit () from /usr/lib/libvlccore.so.8
#18 0x00007ffff2261483 in libvlc_new () from /usr/lib/libvlc.so.5
#19 0x00007ffff627b4fb in VlcInstance::VlcInstance (this=0x6b6fa0, args=..., parent=0x7fffffffe240)
    at /data/Various/Qt/VLC-Qt/VLCQt_Lib/vlc-qt/src/core/Instance.cpp:91
#20 0x000000000041a4c1 in SimplePlayer::SimplePlayer (this=0x7fffffffe240, parent=0x0)
    at /data/Various/Qt/VLC-Qt/VLC-Qt_Examples/examples-master/simple-player/src/SimplePlayer.cpp:27
#21 0x0000000000412604 in main (argc=1, argv=0x7fffffffe398) at /data/Various/Qt/VLC-Qt/VLC-Qt_Examples/examples-master/simple-player/src/main.cpp:22

[kheaactua]

+1

I have a pretty similar issue, the main difference in my stack trace is that I'm using libvlcore.so.7, and am creating the component dynamically in QML, so my stack trace is much longer.

Also using Ubuntu 14.04.05, Qt 5.8.0

[dhurkadevi]

I am facing the same issue

Program received signal SIGSEGV, Segmentation fault.
0x00007fffce572dfc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
(gdb) backtrace
#0 0x00007fffce572dfc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#1 0x00007ffff7dea2da in call_init (l=, argc=argc@entry=1, argv=argv@entry=0x7fffffffde68, env=env@entry=0x7fffffffde78)
at dl-init.c:78
#2 0x00007ffff7dea3c3 in call_init (env=, argv=, argc=, l=) at dl-init.c:36
#3 _dl_init (main_map=main_map@entry=0xa4e750, argc=1, argv=0x7fffffffde68, env=0x7fffffffde78) at dl-init.c:126
#4 0x00007ffff7deee00 in dl_open_worker (a=a@entry=0x7fffffffd208) at dl-open.c:577
#5 0x00007ffff7dea194 in _dl_catch_error (objname=objname@entry=0x7fffffffd1f8, errstring=errstring@entry=0x7fffffffd200,
mallocedp=mallocedp@entry=0x7fffffffd1f0, operate=operate@entry=0x7ffff7deeb30 <dl_open_worker>, args=args@entry=0x7fffffffd208)
at dl-error.c:187
#6 0x00007ffff7dee54b in _dl_open (file=0xa4d280 "/usr/lib/vlc/plugins/gui/libqt4_plugin.so", mode=-2147483647,
caller_dlopen=, nsid=-2, argc=1, argv=0x7fffffffde68, env=0x7fffffffde78) at dl-open.c:661
#7 0x00007ffff268702b in dlopen_doit (a=a@entry=0x7fffffffd420) at dlopen.c:66
#8 0x00007ffff7dea194 in _dl_catch_error (objname=0x628700, errstring=0x628708, mallocedp=0x6286f8, operate=0x7ffff2686fd0 <dlopen_doit>,
args=0x7fffffffd420) at dl-error.c:187
#9 0x00007ffff268762d in _dlerror_run (operate=operate@entry=0x7ffff2686fd0 <dlopen_doit>, args=args@entry=0x7fffffffd420) at dlerror.c:163
#10 0x00007ffff26870c1 in __dlopen (file=, mode=) at dlopen.c:87
#11 0x00007ffff55055cf in ?? () from /usr/lib/libvlccore.so.8
#12 0x00007ffff54eaafb in ?? () from /usr/lib/libvlccore.so.8
#13 0x00007ffff54eaddb in ?? () from /usr/lib/libvlccore.so.8
#14 0x00007ffff54ead24 in ?? () from /usr/lib/libvlccore.so.8
#15 0x00007ffff54eb289 in ?? () from /usr/lib/libvlccore.so.8
#16 0x00007ffff54eb7c7 in ?? () from /usr/lib/libvlccore.so.8
#17 0x00007ffff54722dd in libvlc_InternalInit () from /usr/lib/libvlccore.so.8
#18 0x00007ffff5764483 in libvlc_new () from /usr/lib/libvlc.so.5
#19 0x00007ffff7bb09da in VlcInstance::VlcInstance(QStringList const&, QObject*) ()
from /home/mobility-team/Qt5.8.0/5.8/gcc_64/lib/libVLCQtCore.so.1.2
#20 0x0000000000406c26 in SimplePlayer::SimplePlayer(QWidget*) ()
#21 0x0000000000406406 in main ()

Any solution for this?