It's worked. Thank you Marcus! 

cf. I'm using ComSwiki active page extention which allow each page to include 
Squeak source code, and evaluating as BlockContext(As Mark Guzdial had done
in PWS). To Debug these active pages this kind of 'self halt' is needed. 

 Thanks again.

At 16:35 04.6.10, Marcus Denker wrote:
> Hi,
> 
> 
> Yes, known problem. The vm has a buggy primitiveYield. So a simple fix 
> is to
> just uncomment the call to that primtive in ProcessorScheduler>>yield
> 
>      Marcus
> 
> 
> Am 10.06.2004 um 08:43 schrieb Kouji takahashi:
> 
> > Hi, Is this a known problem? Am I doing wrong?
> > What can I do for the community?
> >
> > 'halt' in BlockContext behaves strangely Squeak3.7beta [latest update: 
> > #5948] on MacOSX10.3.4.
> > VM is Squeak3.7.3Beta4.app and just downloaded image.
> >
> > Open workspace in new Morphic project and  printIt( or evaluate) next 
> > code give different results.
> > [ self halt. 1] value
> >
> > No response(GUI still responds, but unstable. No Debugger appeared. No 
> > result printed.) .
> > GUI freeze(without debugLog. 0.0% CPU usage. cmnd-. has no effect).
> > Debugger open as I expected (when proceed, print 1 as result).
> >

 snip SqueakDebug.log



-------------------------------
^. .^    Kouji Takahashi  <tako at aquilax.co.jp>
 ='=     Tel +81-3-3986-4834    Fax +81-3-5992-0792