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[Help-smalltalk] segfault/abort in CPtr>>#value


From: Stephen Compall
Subject: [Help-smalltalk] segfault/abort in CPtr>>#value
Date: Mon, 30 Oct 2006 23:50:15 -0600
User-agent: Thunderbird 1.5.0.7 (Macintosh/20060909)

wcstok on ##smalltalk asked about a method on gst latest running on
FreeBSD:

|x y|
    x := CPtrCType elementType: #int.
    y := x new.
    y value
!

whereas replacing the last statement with "Memory intAt: y address"
would operate as expected.

I tried it on Linux nocandy.dyndns.org 2.6.12-12mdk #1 Fri Sep 9
18:15:22 CEST 2005 i686 AMD Athlon(tm) XP 2800+ GNU/Linux (built with
 --enable-jit --enable-gtk=no) with
address@hidden/smalltalk--devo--2.2--patch-166:

st> |x y| x:=CPtrCType elementType: #int. y:=x new. y value!
stdin:1: Aborted
(ip 10)CPtr>>#value
(ip 12)UndefinedObject>>#executeStatements
(ip 0)<bottom>
Aborted
...
st> |x y| x:=CPtrCType elementType: #int. y:=x new.
st>       Memory intAt: y address!
138315336

wcstok reported a segfault on line 4437 in prims.def.

-- 
Stephen Compall
http://scompall.nocandysw.com/blog
#gnu-smalltalk,##smalltalk on Freenode IRC




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