Hello Everyone, I think the same issue manifested in bug #924402. To me it looks like the problem started when -fpermissive got added to get the i386 build working again.
Without that a compiler error "invalid conversion" got hit, because a derived class missed the attribute fastcall. In bug #924402 a patch is attached that may solve this issue. Maybe both bugs should be merged. Kind regards, Bernhard https://bugs.debian.org/924402