Crash with a SEGV error

[Monochrome]

Driver crashes with a SEGV error under 9.0.4. I run 10.4.7 on an iBook G4 (PPC7450). My config:

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disk /Applications/SheepShaver-2.3/os9
extfs /Users/monochrome/
screen win/800/600
windowmodes 0
screenmodes 0
seriala 
serialb 
rom /Applications/SheepShaver-2.3/Mac_OS_ROM
bootdrive 0
bootdriver 0
ramsize 268435456
frameskip 12
gfxaccel true
nocdrom false
nonet false
nosound false
nogui false
noclipconversion false
ignoresegv false
jit false
jit68k false
keyboardtype 5
ether slirp
keycodes false
mousewheelmode 1
mousewheellines 3
dsp /dev/dsp
mixer /dev/mixer
ignoresegv false
idlewait true

It boots fine, runs fine, as the following shows:

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SheepShaver V2.3-Pre (May 14 2006) by Christian Bauer and Mar"c" Hellwig
Paranoia checks...
[tick_thread] waiting for emul thread to initialize
[emul_thread] waiting for tick thread to initialize
[emul_thread] filling in registers and waiting for interrupt
[tick_thread] trigger interrupt
SIGUSR2 caught
...passed
Reading ROM file...
Using SDL/coreaudio audio output
WARNING: Unknown DiskStatus(6)
WARNING: Unknown DiskStatus(6)
WARNING: Unknown DiskStatus(6)
WARNING: Unknown DiskStatus(6)
WARNING: Unknown CDROMStatus(97)
WARNING: Unknown CDROMStatus(97)

Then I start the game. SS crashes:

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ERROR: Your Mac program did something terribly stupid.
(pc 0x40810000, 68k pc 0x2a2fcf1c, sp 0x2eecb730, opcode 4cdf1808)

What gives?

[Monochrome]

By the way, it still crashes when I set

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ignoresegv true

...

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ERROR: Your Mac program did something terribly stupid.
(pc 0x40810000, 68k pc 0x2a317ecc, sp 0x2eee66f0, opcode 4cdf1808)

recall it was the following error when I DID NOT ignore segv errors:

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ERROR: Your Mac program did something terribly stupid.
(pc 0x40810000, 68k pc 0x2a2fcf1c, sp 0x2eecb730, opcode 4cdf1808)

the 'pc' and 'sp' parts of the error changed their last 24 bits.