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Recent i386-GENERIC panic

GENERIC kernel built from sources around 201109080300Z panics on boot
as follows:

NetBSD 5.99.55 (GENERIC) #16: Wed Sep  7 22:08:12 CDT 2011
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pci_mem_find: 64-bit memory map which is inaccessible on a 32-bit platform
pchb0 at pci0 dev 0 function 0 panic: kernel diagnostic assertion 
"mod->mod_required[i] != NULL" failed: file  
/d0/nbsd/current/src/sys/kern/kern_module.c; line 692

and dropped into the debugger.  The machine observed has no serial ports,
so I couldn't get a backtrace without doing hand-transcription.  I wrote
the panic message down and the partial dmesg was still resident after
rebooting with the old kernel (built from sources around 201108250200Z
and works OK with updated modules).

I'll try again with another machine which has a serial port, so I can
see if it's a machine-specific thing and if not, get a transcript.
It'll be a day or so until I can try...

|/"\ John D. Baker, KN5UKS               NetBSD     Darwin/MacOS X
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