Mysterious crash when undoing attribute changes

Developers Ruby API
1

I have SketchUp 2017 (17.2.2555, 64-bit) and when I execute the following lines in the console window on an empty file, I get a bugsplat. What am I doing wrong? Any help is appreciated.

Sketchup.active_model.pages.add "page"
Sketchup.active_model.start_operation "operation", true
Sketchup.active_model.pages[0].set_attribute "dict", "key", "value"
Sketchup.active_model.commit_operation
Sketchup.undo
Sketchup.file_new

This is the smallest repro case I could come up with, but of course I need it in a real-world scenario, that keeps crashing when using undo, too.

(crashes also with SU2016)

3

Nobody have any clues? Did anybody ever try to set attributes of pages?

Can anyone at least reproduce the issue? I did send the crashreport in both SU2016 and SU2017 but did not hear back from anyone. How long does it take normally?

4

Apparently there aren’t many people using attributes for pages. (Or else they don’t undo)

I’ve tried this all the way back to SU 2014

5

I can’t follow the logic of why you would have a ‘commit_opperation’ or an ‘undo’ in this situation…

wouldn’t page.delete_attribute("dict") be safer?

john

6

In my production code there is only lines 2-4, setting the attribute of the page. Then I experienced crashes and found out that it was related to undo (which I did using the SketchUp GUI). Fortunately SketchUp supports undoing via script, so I needed only a script to reproduce the crash.

I can’t release a plugin that crashes when the user triggers an undo command, so I think I will store the data elsewhere.

7

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