There is an assertion error when setting some configuration settings that has been introduced since 17.12.
Example: Menu Settings->Editor...->General settings->C/C++ Editor settings
Tick "Interpret #if, #elseif, #endif to grey out inactive preprocessor-code".
Press "OK".
Results in a wxWidgets Debug Alert box:
A debugging check in this application has failed.
../../src/common/wincmn.cpp(1531):assert ""Assert failure"" failed in RemoveEventHandler();
where has the event handler gone?
Continuing (rather than exiting app) allows normal operation to continue.
This is running "svn build rev 11511 (2018-11-19 15:21:51) gcc 5.1.0 Windows/unicode - 64 bit" running on Windows 7 Professional 64-bit with Service Pack 1. I have seen this with other workflows but did not record what they were. (I had more time today to record the workflow.)