i’m seeing this assertion failure from within gstreamer:
gst_base_src_set_format: assertion 'GST_STATE (src) <= GST_STATE_READY' failed
afaict this happens under the following condition:
- set_state(PAUSED) on a pipeline
- while this state async state change is happening, set_state(NULL)
application thread:
5 gst_pad_stop_task gstpad.c 6514 0x7fffe7b1bc8a
6 gst_type_find_element_activate_sink_mode gsttypefindelement.c 1288 0x7fffe65e5000
7 activate_mode_internal gstpad.c 1224 0x7fffe7b07ffe
8 gst_pad_set_active gstpad.c 1122 0x7fffe7b07a88
9 activate_pads gstelement.c 3189 0x7fffe7ae0bd7
10 gst_iterator_fold gstiterator.c 618 0x7fffe7af97a2
11 iterator_activate_fold_with_resync gstelement.c 3213 0x7fffe7ae0b25
12 gst_element_pads_activate gstelement.c 3258 0x7fffe7ae094b
13 gst_element_change_state_func gstelement.c 3323 0x7fffe7adf0db
14 gst_type_find_element_change_state gsttypefindelement.c 1353 0x7fffe65e4cfe
15 gst_element_change_state gstelement.c 3101 0x7fffe7adce93
16 gst_element_set_state_func gstelement.c 3055 0x7fffe7adf775
17 gst_element_set_state gstelement.c 2956 0x7fffe7adc512
18 gst_bin_element_set_state gstbin.c 2582 0x7fffe7aa66c9
19 gst_bin_change_state_func gstbin.c 2934 0x7fffe7aa082c
20 gst_decode_bin_change_state gstdecodebin2.c 5500 0x7fffe646739c
21 gst_element_change_state gstelement.c 3101 0x7fffe7adce93
22 gst_element_set_state_func gstelement.c 3055 0x7fffe7adf775
23 gst_element_set_state gstelement.c 2956 0x7fffe7adc512
24 gst_bin_element_set_state gstbin.c 2582 0x7fffe7aa66c9
25 gst_bin_change_state_func gstbin.c 2934 0x7fffe7aa082c
26 gst_pipeline_change_state gstpipeline.c 534 0x7fffe7b23e06
27 gst_element_change_state gstelement.c 3101 0x7fffe7adce93
28 gst_element_set_state_func gstelement.c 3055 0x7fffe7adf775
29 gst_element_set_state gstelement.c 2956 0x7fffe7adc512
30 QGstElement::setStateSync(GstState, std::chrono::duration<long, std::ratio<1l, 1000000000l>>) qgst.cpp 945 0x7fffe4cf545d
gstreamer thread (which raises the assertion):
1 g_logv (x86_64) /lib/x86_64-linux-gnu/libglib-2.0.so.0 0x7ffff2d196a1
2 g_log (x86_64) /lib/x86_64-linux-gnu/libglib-2.0.so.0 0x7ffff2d19953
3 gst_base_src_set_format gstbasesrc.c 644 0x7fffe86a2648
4 gst_app_src_start gstappsrc.c 1096 0x7fffea5f16fa
5 gst_base_src_start gstbasesrc.c 3570 0x7fffe86ada93
6 gst_base_src_activate_pull gstbasesrc.c 3994 0x7fffe86ae042
7 gst_base_src_activate_mode gstbasesrc.c 4029 0x7fffe86a8eab
8 activate_mode_internal gstpad.c 1224 0x7fffe7b07ffe
9 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
10 activate_mode_internal gstpad.c 1192 0x7fffe7b07eeb
11 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
12 gst_ghost_pad_internal_activate_pull_default gstghostpad.c 302 0x7fffe7aebf96
13 gst_ghost_pad_internal_activate_mode_default gstghostpad.c 344 0x7fffe7aebcc6
14 activate_mode_internal gstpad.c 1224 0x7fffe7b07ffe
15 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
16 activate_mode_internal gstpad.c 1192 0x7fffe7b07eeb
17 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
18 gst_type_find_element_activate_src_mode gsttypefindelement.c 1090 0x7fffe65e5705
19 activate_mode_internal gstpad.c 1224 0x7fffe7b07ffe
20 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
21 activate_mode_internal gstpad.c 1192 0x7fffe7b07eeb
22 gst_pad_activate_mode gstpad.c 1329 0x7fffe7b0872f
23 qtdemux_sink_activate qtdemux.c 8591 0x7fffe4b4ebb2
24 gst_pad_set_active gstpad.c 1107 0x7fffe7b078f5
25 activate_pads gstelement.c 3189 0x7fffe7ae0bd7
26 gst_iterator_fold gstiterator.c 618 0x7fffe7af97a2
27 iterator_activate_fold_with_resync gstelement.c 3213 0x7fffe7ae0b25
28 gst_element_pads_activate gstelement.c 3258 0x7fffe7ae094b
29 gst_element_change_state_func gstelement.c 3309 0x7fffe7adf0b1
30 gst_qtdemux_change_state qtdemux.c 2681 0x7fffe4b4dc3e
31 gst_element_change_state gstelement.c 3101 0x7fffe7adce93
32 gst_element_set_state_func gstelement.c 3055 0x7fffe7adf775
33 gst_element_set_state gstelement.c 2956 0x7fffe7adc512
34 connect_pad gstdecodebin2.c 2576 0x7fffe646f856
35 analyze_new_pad gstdecodebin2.c 1908 0x7fffe646c5de
36 type_found gstdecodebin2.c 2945 0x7fffe646aae5
37 ___lldb_unnamed_symbol145 (x86_64) /lib/x86_64-linux-gnu/libffi.so.8 0x7fffea507b16
38 ___lldb_unnamed_symbol138 (x86_64) /lib/x86_64-linux-gnu/libffi.so.8 0x7fffea5043ef
39 ffi_call (x86_64) /lib/x86_64-linux-gnu/libffi.so.8 0x7fffea5070be
40 g_cclosure_marshal_generic (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea548db2
41 g_closure_invoke (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea5422fa
42 ___lldb_unnamed_symbol1329 (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea57190c
43 ___lldb_unnamed_symbol1162 (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea562591
44 g_signal_emit_valist (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea5627c1
45 g_signal_emit (x86_64) /lib/x86_64-linux-gnu/libgobject-2.0.so.0 0x7fffea562883
46 gst_type_find_element_emit_have_type gsttypefindelement.c 239 0x7fffe65e6d85
47 gst_type_find_element_loop gsttypefindelement.c 1195 0x7fffe65e6272
48 gst_task_func gsttask.c 399 0x7fffe7b65705
49 default_func gsttaskpool.c 70 0x7fffe7b6670a
50 ___lldb_unnamed_symbol2711 (x86_64) /lib/x86_64-linux-gnu/libglib-2.0.so.0 0x7ffff2d48542
51 ___lldb_unnamed_symbol2690 (x86_64) /lib/x86_64-linux-gnu/libglib-2.0.so.0 0x7ffff2d42c82
52 asan_thread_start(void *) (x86_64) /home/tim/build/build-qt6-dev-clang_18_qt_dev-Debug2/qtmultimedia/tests/auto/integration/qmediaplayerbackend/tst_qmediaplayerbackend 0x55555563d43d
53 start_thread pthread_create.c 447 0x7fffede9ca94
54 __clone3 clone3.S 78 0x7fffedf29c3c
is this a bug or a feature?
