GLWINDOW EAGL bug with iOS11 and XCode 9.0 beta 4

[elio francesconi]

Hi all,
I'm testing compatibility with iOS 11 before the Apple release in september
and I noticed a crash on GLWindow EAGL module.

Before crashing i see some warning then the crash on draw_cb.

=================================================================
Main Thread Checker: UI API called on a background thread: -[UIView layer]
PID: 1909, TID: 1403054, Thread name: (none), Queue name:
org.freedesktop.gstreamer.glwindow, QoS: 0
Backtrace:
4   GstPlay                             0x0000000102503594
gst_gl_context_eagl_update_layer + 480
5   GstPlay                             0x0000000102504a60
gst_gl_window_eagl_set_window_handle + 176
6   GstPlay                             0x00000001035ebd78
_set_window_handle_cb + 104
7   GstPlay                             0x0000000102504e54
__gst_gl_window_eagl_send_message_async_block_invoke + 72
8   libdispatch.dylib                   0x00000001063498ec
_dispatch_call_block_and_release + 24
9   libdispatch.dylib                   0x00000001063498ac
_dispatch_client_callout + 16
10  libdispatch.dylib                   0x0000000106358380
_dispatch_queue_serial_drain + 692
11  libdispatch.dylib                   0x000000010634ce30
_dispatch_queue_invoke + 332
12  libdispatch.dylib                   0x000000010635935c
_dispatch_root_queue_drain_deferred_wlh + 424
13  libdispatch.dylib                   0x0000000106360298
_dispatch_workloop_worker_thread + 652
14  libsystem_pthread.dylib             0x00000001851a024c
_pthread_wqthread + 932
15  libsystem_pthread.dylib             0x000000018519fe9c start_wqthread +
4

2017-08-02 10:27:47.576231+0200 GstPlay[1909:1403054] [reports] Main Thread
Checker: UI API called on a background thread: -[UIView layer]
PID: 1909, TID: 1403054, Thread name: (none), Queue name:
org.freedesktop.gstreamer.glwindow, QoS: 0
Backtrace:
4   GstPlay                             0x0000000102503594
gst_gl_context_eagl_update_layer + 480
5   GstPlay                             0x0000000102504a60
gst_gl_window_eagl_set_window_handle + 176
6   GstPlay                             0x00000001035ebd78
_set_window_handle_cb + 104
7   GstPlay                             0x0000000102504e54
__gst_gl_window_eagl_send_message_async_block_invoke + 72
8   libdispatch.dylib                   0x00000001063498ec
_dispatch_call_block_and_release + 24
9   libdispatch.dylib                   0x00000001063498ac
_dispatch_client_callout + 16
10  libdispatch.dylib                   0x0000000106358380
_dispatch_queue_serial_drain + 692
11  libdispatch.dylib                   0x000000010634ce30
_dispatch_queue_invoke + 332
12  libdispatch.dylib                   0x000000010635935c
_dispatch_root_queue_drain_deferred_wlh + 424
13  libdispatch.dylib                   0x0000000106360298
_dispatch_workloop_worker_thread + 652
14  libsystem_pthread.dylib             0x00000001851a024c
_pthread_wqthread + 932
15  libsystem_pthread.dylib             0x000000018519fe9c start_wqthread +
4


Thread 8 Queue : org.freedesktop.gstreamer.glwindow (serial)
#0 0x0000000185196ba0 in _platform_memmove ()
#1 0x0000000198ebcb1c in SCNGetPerformanceStatistics ()
#2 0x0000000105ece064 in __clang_call_terminate ()
#3 0x0000000105ecade8 in __clang_call_terminate ()
#4 0x00000001060af3ec in __clang_call_terminate ()
#5 0x00000001060acf08 in __clang_call_terminate ()
#6 0x00000001025044c0 in gst_gl_context_eagl_swap_buffers at
/Users/eggzero/Projects/EGGZERO/SRC/gst-examples/playback/player/ios/eagl/gstglcontext_eagl.m:341
#7 0x0000000102504dec in draw_cb at
/Users/eggzero/Projects/EGGZERO/SRC/gst-examples/playback/player/ios/eagl/gstglwindow_eagl.m:208
#8 0x00000001035ecc9c in _run_message_sync at
/Users/jan/devel/cerbero/build/sources/ios_universal/arm64/gst-plugins-bad-1.0-1.12.2/gst-libs/gst/gl/gstglwindow.c:571
#9 0x0000000102504e54 in
__gst_gl_window_eagl_send_message_async_block_invoke at
/Users/eggzero/Projects/EGGZERO/SRC/gst-examples/playback/player/ios/eagl/gstglwindow_eagl.m:164

To reproduce the issue use:


   - GStreamer 1.12.2
   - GstPlay: git://anongit.freedesktop.org/gstreamer/gst-examples

Compile GstPlay with XCode 9.0 beta 4 and play a video.

Thanks for your help

Elio
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