When running the whole a11y mochitest suite under linux I get timeout failure for events/test_selection.html: (firefox-bin:2116): Gtk-CRITICAL **: IA__gtk_clipboard_set_with_data: assertion `targets != NULL' failed 527 ERROR TEST-UNEXPECTED-FAIL | chrome://mochitests/content/a11y/accessible/events/test_selection.html | Test timed out. however if I run that single test it pass ok.

This is the relevant backtrace: #6 0x02e8189a in gtk_clipboard_set_with_data () from /usr/lib/libgtk-x11-2.0.so.0 #7 0x011d2eb9 in nsClipboard::SetData (this=0xa1f7ff10, aTransferable=0xa22a57a0, aOwner=0x0, aWhichClipboard=0) at /home/fer/code/mozilla/widget/src/gtk2/nsClipboard.cpp:265 #8 0x049f8cce in SelectionCopyHelper (aSel=0xaa1739c0, aDoc=0xa7269000, doPutOnClipboard=1, aClipboardID=0, aFlags=524288, aTransferable=0x0) at /home/fer/code/mozilla/content/base/src/nsCopySupport.cpp:272 #9 0x049f8ddf in nsCopySupport::HTMLCopy (aSel=0xaa1739c0, aDoc=0xa7269000, aClipboardID=0) at /home/fer/code/mozilla/content/base/src/nsCopySupport.cpp:290 #10 0x048464ac in nsAutoCopyListener::NotifySelectionChanged (this=0xb23f3ba0, aDoc=0xa72690f8, aSel=0xaa1739c0, aReason=4) at /home/fer/code/mozilla/layout/generic/nsSelection.cpp:6079 #11 0x048455eb in nsTypedSelection::NotifySelectionListeners (this=0xaa1739c0) at /home/fer/code/mozilla/layout/generic/nsSelection.cpp:5786 #12 0x0483b898 in nsFrameSelection::NotifySelectionListeners (this=0xa71b28a0, aType=1) at /home/fer/code/mozilla/layout/generic/nsSelection.cpp:2299 #13 0x0483aca6 in nsFrameSelection::SetMouseDownState (this=0xa71b28a0, aState=0) at /home/fer/code/mozilla/layout/generic/nsSelection.cpp:1964 #14 0x047d2ff7 in nsFrame::HandleRelease (this=0xa5f656f8, aPresContext=0xa726a400, aEvent=0xbfa1ffa8, aEventStatus=0xbfa1f974) at /home/fer/code/mozilla/layout/generic/nsFrame.cpp:2610 #15 0x047d152b in nsFrame::HandleEvent (this=0xa5f656f8, aPresContext=0xa726a400, aEvent=0xbfa1ffa8, aEventStatus=0xbfa1f974) at /home/fer/code/mozilla/layout/generic/nsFrame.cpp:1856 where: 263 // Set getcallback and request to store data after an application exit 264 if (gtk_clipboard_set_with_data(gtkClipboard, gtkTargets, numTargets, 265 clipboard_get_cb, clipboard_clear_cb, this)) (gdb) p gtkTargets $1 = (GtkTargetEntry *) 0x0 (gdb) p numTargets $2 = 0 (gdb) p list $3 = (GtkTargetList *) 0xa2356ec0 (gdb) p *list $4 = { list = 0x0, ref_count = 1 }

Does accessibility show up further in the stack? This might be a plain old widget bug. If we can get a good reduced test case, let's do that and triage over to widget.

No there is nothing related to a11y here. This is the log when it's run as a single test: Event queue: invoke: 'option@id='onions' node' added to selection registered: event type: selection within, target: [ 'select@id='toppings' node' , role: listbox, address: 0xa438dc40] registered: event type: selection add, target: [ 'option@id='onions' node' , role: listbox option, name: 'onions', address: 0xa8fd8700] Event type: selection within. Target: [ 'select@id='toppings' node' , role: listbox, address: 0xa438dc40]. Listeners count: 1 ***** EQ matched: selection within ***** Event type: selection add. Target: [ 'option@id='onions' node' , role: listbox option, name: 'onions', address: 0xa8fd8700]. Listeners count: 1 ***** EQ matched: selection add ***** and this is when running the whole events/* tests: Event queue: invoke: 'option@id='onions' node' added to selection registered: event type: selection within, target: [ 'select@id='toppings' node' , role: listbox, address: 0xa3717830] registered: event type: selection add, target: [ 'option@id='onions' node' , role: listbox option, name: 'onions', address: 0xb11eed60] WARNING: IA__gtk_clipboard_set_with_data: assertion `targets != NULL' failed: 'glib warning', file /home/fer/code/mozilla/toolkit/xre/nsSigHandlers.cpp, line 193 (firefox-bin:4182): Gtk-CRITICAL **: IA__gtk_clipboard_set_with_data: assertion `targets != NULL' failed Event type: text caret moved. Target: [ 'div node' , role: section, address: 0xa4ddb820] Event type: text selection changed. Target: [ 'div node' , role: section, address: 0xa4ddb820] Event type: state change. Target: [ 'toolbarbutton@id='urlbar-reload-button' node' , role: pushbutton, name: 'Location', address: 0xa35f4dd0]

Skipping the gtk_clipboard_set_with_data call when targets is NULL would silence the assertion message, but wouldn't change behavior and so wouldn't help with the timeout.

test is enabled on linux, closing as wfm