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To: pb@fasterix.freenix.org (Pierre Beyssac)
cc: freebsd-current@FreeBSD.ORG
Subject: Re: panics with csh under -current: looking for testers 
In-reply-to: Your message of "Sun, 21 Dec 1997 16:08:38 +0100."
             <19971221160838.ZP28443@@> 
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Date: Sun, 21 Dec 1997 19:27:25 +0300
From: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
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Pierre Beyssac wrote:
> I have the following problem with the latest -current.
> 
> Running the following trivial csh script panics the machine each
> time:
> 
> #!/bin/csh -f
> nonexistentfile1
> rm nonexistentfile2
> 
> If you replace csh with sh, it doesn't seem to panic anymore...

I suspect it is because csh use vfork, while sh don't use it. If
sysctl kern.fast_vfork=0, kernel doen't panic.
> 
> I've sent a PR for this yesterday, but of the two persons who
> replied, no one was able to reproduce it (one of them maybe because
> his kernel was dated December 9th). I'd like to know if I'm just
> having hallucinations or somebody else can reproduce the bug (It
> works both on a Cyrix P166+ IDE 32Mb and an AMD K6, 64Mb, SCSI).

I have reproduced it with kernel from yesterday and kernel from 
about a week ago. 

Dima