I have a PXE boot setup, and if I have "noipv6" on the PXELINUX config line, I get a "loader received SIGSEGV!". If I take out "noipv6", I get prompted for network info (DHCP, I have "ip=dhcp" on the config line as well), I can disable IPv6 (I don't have it so there's no point in waiting for it), and anaconda goes on. I'll attach a trace from i386 (I get the same result with x86_64 on this system).
Created attachment 291929 [details] loader trace
*** This bug has been marked as a duplicate of 428870 ***