[M3devel] thread.fork getting nil on nt386gnu?

[Jay]

Assertions, like a lot of code, often succeed by luck.
There's little point in asserting a pointer isn't null right before dereferencing it. You are going to crash on one line or the next.
 
 - Jay


CC: m3devel at elegosoft.comFrom: hosking at cs.purdue.eduTo: jayk123 at hotmail.comSubject: Re: [M3devel] thread.fork getting nil on nt386gnu?Date: Fri, 7 Mar 2008 14:48:29 -0500Umm.  If the assertion is wrong then how has this code ever run before...



On Mar 7, 2008, at 2:21 PM, Jay wrote:


assertions are also notoriously wrong.Two out of three thread implementations don't have it..  - Jay


CC: m3devel at elegosoft.comFrom: hosking at cs.purdue.eduTo: jayk123 at hotmail.comSubject: Re: [M3devel] thread.fork getting nil on nt386gnu?Date: Fri, 7 Mar 2008 08:41:23 -0500
It is always dangerous to remove assertions that have worked in the past.  Better to understand why they no longer work.  Anyway, what this suggests is something in alignment because what the assertion checks is that the method table for the Thread.Closure object passed to Thread.Fork contains a non-NIL function pointer in the "apply" slot.


Antony Hosking | Associate Professor | Computer Science | Purdue University
305 N. University Street | West Lafayette | IN 47907 | USA
Office +1 765 494 6001 | Mobile +1 765 427 5484


On Mar 7, 2008, at 1:00 AM, Jay wrote:

This asssertion is absent from the two other thread implementations, and is dependent on a loophole to underlying details that I didn't track down to determine if they are corrrect. So I merely removed this. Still can't connect to the X server for some reason..  - Jay


CC: m3devel at elegosoft.comFrom: hosking at cs.purdue.eduTo: jayk123 at hotmail.comSubject: Re: [M3devel] thread.fork getting nil on nt386gnu?Date: Tue, 26 Feb 2008 13:29:28 -0500Looks like a corrupted/uninitialized type (method table contains a NIL pointer...).



Antony Hosking | Associate Professor | Computer Science | Purdue University
305 N. University Street | West Lafayette | IN 47907 | USA
Office +1 765 494 6001 | Mobile +1 765 427 5484


On Feb 25, 2008, at 1:15 PM, Jay wrote:

any obvious ideas? I'll have to pause for a bit again..Jay at jay-win1 /cygdrive/c/dev2/cm3.2/m3-ui/juno-2/juno-app/NT386GNU/Juno.exe****** runtime error:***    Thread client error: NIL apply method passed to Thread.Fork!***    file "ThreadWin32.m3", line 578***  14837 [sig] Juno 3908 c:\dev2\cm3.2\m3-ui\juno-2\juno-app\NT386GNU\Juno.exe: *** fatal error - called with threadlist_ix -1Hangup  - Jay

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