https://bugs.winehq.org/show_bug.cgi?id=56493
--- Comment #11 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Hans Leidekker from comment #10)
A wine build before that commit also shows an exception in this custom action and failure return from the GenerateFontCacheData() call, which is ignored.
I don't get a debugger window but I don't get one after this commit either.
As I mentioned already the debugger window appears not at every run, probably because the process terminates before the debugger is able to attach. Besides the unhandled exception leading to the debugger invocation starts to appear only after the identified commit, which in turn happens because of missing PresentationCore.dll. Probably it's better to investigate the missing dependency regression due to the MSI logic changes.