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Re: [Bug-gforth] Crash on OS X

From: Bernd Paysan
Subject: Re: [Bug-gforth] Crash on OS X
Date: Sun, 21 Feb 2010 21:44:53 +0100
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Am Sonntag 21 Februar 2010 21:22:16 schrieb Torbjorn Kristoffersen:
> I typed "see drop" in Gforth 0.7.0 on Mac OS X Snow Leopard (10.6.2 on
> a Mac Pro) and the OS started behaving completely erratically.
> For one, all the icons on my desktop disappeared and I could no longer
> start any programs.
> I had a shell open, and it told me my user was suddenly gone.  "id"
> revealed that I had a uid, but no username!
> Upon a restart, everything was fine again. I've reproduced the bug 3
> times by typing "see drop".
> Did Gforth trigger a nasty OS X bug?  Can anyone else please confirm this?

I tried this and it seems to work fine (from within Gforth, the disassembler 
output was as expected), but then all hell break lose.  I couldn't start the 
Finder any more, the software update that found something didn't react, and 
finally, the menu folded down (Mac OS X 10.5).  I can confirm that this 
triggers a nasty Mac OS X bug.

What we do for see <primitive> on x86_64 is: We start gdb, and advice it to 
produce an assembler dump of the region of the primitive.

Bernd Paysan
"If you want it done right, you have to do it yourself"

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