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Eclipse/papyrus crash [message #1806917]

Fri, 17 May 2019 10:26

Eclipse User

Just got this error when I added a decision node on an activity diagram:
Quote:

java: ../../../../src/cairo-surface.c:953: cairo_surface_destroy: Assertion `(_cairo_atomic_int_get (&(&surface->ref_count)->ref_count) > 0)' failed.

Eclipse locked up for ~2min then silently disappeared taking my unsaved work with it which fortunately was not much.
Papyrus is version 4.3.201913131008
Eclipse is version 4.11.0.20190307-0500
Java version is openjdk 1.8.0_212
Platform is ubuntu based on debian stretch/sid.

Not much to go on I know. Is there a log file somewhere?
Is this a known issue and is it a Papyrus problem or an Eclipse problem?

Steve

Re: Eclipse/papyrus crash [message #1806922 is a reply to message #1806917]

Fri, 17 May 2019 11:53

Eclipse User

Hi Stephen,

Unfortunately, Papyrus isn't well tested on Linux. Especially, depending on the version of Eclipse, either GTK2 or GTK3 may provide higher stability. I believe SWT dropped GTK2 support recently (Around Eclipse 2018/12), so there's not much you can do - you're stuck with GTK3 now

I believe this kind of error is related to SVG Rendering in Papyrus (Most likely to happen when lots of SVGs are involved, and the Activity Diagram uses SVGs for each non-rectangle node, including Decision Node). I'm not sure who's responsible for this kind of error (Is it a bug in SWT/GTK? Is it something that Papyrus/GMF/Batik SVG Renderer is doing wrong?), or how to investigate this

Regards,
Camille

Re: Eclipse/papyrus crash [message #1806969 is a reply to message #1806922]

Mon, 20 May 2019 07:11

Eclipse User

Hi,

well, while more people in the Papyurs development team use Windows, I'm a Linux user and regularly test current Papyrus versions. Concerning this error, it's apparently related to the use of SVG images. I've reported Bug 544501 - so far without resolution. I also tried to set the SWT_CAIRO environment variable, but this did not change the problem.

Best

Ansgar

Re: Eclipse/papyrus crash [message #1807031 is a reply to message #1806969]

Tue, 21 May 2019 09:03

Eclipse User

Crashed on me 4 times yesterday. It seems to happen when a diagram, in this case an Activity Diagram, is zoomed in.

Steve

Re: Eclipse/papyrus crash [message #1807037 is a reply to message #1807031]

Tue, 21 May 2019 10:56

Eclipse User

I can reproduce the problem, as soon as an SVG shape is shown in the diagram. A not very nice workaround is to disable SVG shapes via the following "style" setting: you loose graphical information, but avoid a crash.

* {
svgFile : "none"
}

Re: Eclipse/papyrus crash [message #1807044 is a reply to message #1807037]

Tue, 21 May 2019 12:59

Eclipse User

Would that mean that you cannot zoom in or does Papyrus just use some other method to display the diagrams in that case?

Steve

Re: Eclipse/papyrus crash [message #1807067 is a reply to message #1807044]

Wed, 22 May 2019 02:58

Eclipse User

Hi Stephen,

During zooming in/out, SVGs are re-rendered to match the new scale. There is no native SVG Rendering in Eclipse/Papyrus, so the SVGs are pre-processed to a bitmap based on the zoom level, and then displayed as bitmaps. When the zoom level changes, the bitmap has to be generated again to match the new definition.

So I can definitely imagine that zooming in and out with a lot of SVG increases the risk of crashes, since everything tends to indicate that SVG Rendering is part of the problem

Cheers,
Camille

Re: Eclipse/papyrus crash [message #1807203 is a reply to message #1807067]

Fri, 24 May 2019 11:04

Eclipse User

I came across this bug
https://bugs.eclipse.org/bugs/show_bug.cgi?id=535214
which appears to be the same thing so I'm adding it for reference.

Steve

Re: Eclipse/papyrus crash [message #1807978 is a reply to message #1807203]

Thu, 13 June 2019 10:58

Eclipse User

Hi Steve,

I'm happy that the problem is apparently no longer reproducible with milestone 3 of 2019-06, though there is no specific patch for the bug i.e. is likely solved as a side-effect of another bug. Can you please test by downloading a developer release?
Concerning 535214, I don't think the two are related - but I left the reference for the moment.

Ansgar

Re: Eclipse/papyrus crash [message #1807984 is a reply to message #1807978]

Thu, 13 June 2019 12:15

Eclipse User

See the messages from Eric Williams in Bug 544501. Apparently, the error is back in RC1 bug (and hopefully fixed in the release, not sure, If I understood this part).

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