FreeBSD 10.0 Alpha 2 panic "kernel trap 12 with interrupts disable"

I'm trying to build kdelibs on 10.0 Alpha 2, however after 3 tries    I get
a panic while building gcc, but I'm not sure if its related or just
coincidence!

---
Kernel 12 trap 12 with interrupts disable

Fatal trap 12: page fault in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x30
fault code = supervisor read data, page not present
.......

Stopped at trunstile_broadcast+0x8c: movq 0x20(%rbx, %rax,1),%rdx

I was able to build Xorg though without any panic.7


Thanks