Created attachment 525020 [details] fixed specfile $RPM_OPT_FLAGS sets -mtune=atom on i686. This causes nodejs to segfault on i686, while it doesn't on x86_64 where -mtune=generic. The attached specfile overrides RPM_OPT_FLAGS and sets -mtune=generic on i686, fixing nodejs.
Ugh, nodejs is still having trouble. Closing for now so nobody does any unnecessary work.