Strange crash building "transmission"

[Scott Ellis <scotte%warped.com@localhost>]

Okay, this is weird, and I am wondering if anyone else has seen this.

I was trying to build 1.50b4 of Transmission 
(http://www.transmissionbt.com/), using curl 7.19.3 on amd64, with 
-current as of today using "-O3 -march=nocona" as my CFLAGS on a 
filesystem mounted with "-o log".

Running (in the transmission directory) "./configure --enable-cli 
--disable-nls" repeatedly yields:

fatal protection fault in supervisor mode
trap type 4 code 0 rip ffffffff801c18da cs 8 rflags 10282 cr2 
7f7ffda011fc cpl 0 rsp ffff800052123ab0
panic: trap
Begin traceback...
uvm_fault(0xffff800052070b88, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff801562af cs 8 rflags 10246 cr2  0 cpl 0 
rsp ffff800052123680
panic: trap
Faulted in mid-traceback; aborting...rebooting...

This happens just after "Appending 'F77' to libtool flags" in the 
libevent configure script (called by transmission's configure script).

What the heck?  The system is otherwise quiescent (technically, there 
was a Raidframe parity rebuild in the background on that particular 
crash, but it happened when the array was fine too), and I can't get a 
decent backtrace to see even where to look.

Does this sound like a kernel bug with -current (happens with multiple 
kernels from random times in Feb)?  FS corruption (fsck says the 
filesystems are clean)?  RAM issues (memcheck says all is well)?

        ScottE