I pushed two commits to the dialog module, one to handle a corner situation that could appear if you do stress testing and the other one to avoid saving incomplete dialog structures. The first one might have been the one causing the crashes for you.

The commits are 7f9194c and cecdd08. I plan to backport them to 4.3 branch to be part of 4.3.2 release.

Testing and reporting the results will be appreciated.

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