[Simh] Recent build crashes on OSX

[Michael Huff]

I grabbed simh_master.zip from github yesterday and compiled it on OSX 
and in a virtualbox instance of Linux Mint 17. OSX is the native OS, 
Linux is in a VM.

I have a 43BSD machine accessible to both on a shared drive. It will 
boot normally when I run vax780 inside of the Linux VM, but  when I run 
the vax780 binary I compiled in OSX it crashes.

I'm assuming I should file a bug report on the OSX build? Should I post 
that over at github and what do I need to include in the report?

I realize this is a very noob-ish mail, but I don't want to submit 
something long and involved and find it's entirely irrelevant, so I'm 
asking here first.

if it helps, this is what the crash looks like:
---
Michaels-iMac:43BSD michael$ uname -a
Darwin Michaels-iMac.local 15.3.0 Darwin Kernel Version 15.3.0: Thu Dec 
10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64 x86_64
Michaels-iMac:43BSD michael$ !va
vax780 boot.ini.default

VAX 11/780 simulator V4.0-0 Beta        git commit id: aadd66c7
loading ra(0,0)boot
Boot
: ra(0,0)vmunix
279844+80872+100324 start 0x12f8

Process PTE in P0 or P1 space, PC: 8002B82F (XORW3 
@-7035(R8), at D0FF6436, at -70B0(R1))
sim> q
Goodbye
---
When I run that under my linux VM, I get:
---
michael at michael-VirtualBox ~/simh/43BSD $ uname -a
Linux michael-VirtualBox 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 
23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
michael at michael-VirtualBox ~/simh/43BSD $ vax780 boot.ini.default

VAX 11/780 simulator V4.0-0 Beta        git commit id: aadd66c7
loading ra(0,0)boot
Boot
: ra(0,0)vmunix
279844+80872+100324 start 0x12f8
4.3 BSD UNIX #1: Fri Jun  6 19:55:29 PDT 1986
     karels at monet.Berkeley.EDU:/usr/src/sys/GENERIC
real mem  = 8388608
SYSPTSIZE limits number of buffers to 140
avail mem = 7187456
using 140 buffers containing 524288 bytes of memory
mcr0 at tr1
mcr1 at tr2
---
and it continues to the login prompt and acts normally.

Thank you for your time and advice.
-Michael