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[eclipse-dev] Crash when using recent versions of SWT on Linux
  • From: "Rogers, Will (DLSLtd,RAL,LSCI)" <>
  • Date: Thu, 22 Oct 2020 14:46:25 -0000
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  • Thread-topic: Crash when using recent versions of SWT on Linux


I have an Eclipse RCP application that has been around for several years. When updating from Eclipse 2018-12 to 2020-12 I suddenly get a complete crash on Linux (GTK3) when opening a particular editor.

Debugging suggests that I get problems when either creating a new SWT Image object or using a GC to draw on that image when not on the main UI thread. redraw() is always called on the UI thread. I can't recreate this in simple SWT applications.

When doing this I get a variety of problems including 1) complete crashes with the below message and 2) deadlocks, possibly causing my entire Gnome session to lock up.

Has something changed about SWT that causes this problem? Or were we lucky not to see it before?

Thanks in advance,
Will Rogers


[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
java: xcb_io.c:165: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.



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