Compiler bugs

>
> Hello,
>
> One isn't likely to run into these, when writing typical
> Smalltalk code. Anyway, here it is:
>
> """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> None of the following compiles:
>
> "1<2 ifTrue: [] ifFalse: self falseBlock"
> "1<2 ifTrue: [[self trueAction]] value"
> "1 to: 10 do: [self doBlock] value"
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> The code for (and the result of):
>
> "1=(1<2 ifTrue: [1];ifTrue: [1])"
>
> is incorrect.
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> The code for (and the result of):
>
> "5=(true ifTrue: [5=5 ifTrue: []. 5])"
>
> is incorrect. So is:
>
> "i:=0. 10 timesRepeat: [0 ifTrue: []. i:=i+1]. i"
>
> although here walkback would probably be more appropriate.
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> Obviously because of the same bug, the following:
>
> "i:=0. [1<2 ifTrue: []. (i:=i+1)<33510] whileTrue"
>
> results in stack overflow signal, but I only get it for
> values up to 48869 - after that, there is just GPF
> (it could be a Win95 thing, though).
>
> An even easier way to get GPF is:
>
> "1 timesRepeat: [1 ifTrue: []. 1<2]"
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> Different bug, but also with stack overflow:
>
> "[] repeat; value"
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> The result of the following is incorrect:
>
> "[false] whileTrue; yourself"
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> This is tricky:
>
> "(super) bar"
> "super foo;bar"
>
> In both cases Dolphin does normal send of #bar, not supersend.
> VW (and ANSI) says, that first one is illegal and second
> should supersend both #foo and #bar. Squeak, as always, has
> it's own unique way of doing things - the first one is
> equivalent to "super bar" and the second one is illegal, so
> in each case Dolphin, VW and Squeak give three different
> interpretations.
>
> """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> This:
>
> "1<2 ifFalse: [[] repeat]"
>
> puts compiler in an infinite loop.
>
> """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>
> Artur Zaroda
> [hidden email]
>
>

>
> "Blair McGlashan" <[hidden email]> wrote
> > > > We are currently working on a replacement compiler
> > >
> > > In Smalltalk? Will it be part of the usual sources? Cool.
> >
> > Yes and yes.
>
> Will it include VW-like features such as automatic temp var insertion and
> name correction? I guess, at least it could be added then.
>
> Hasko
>
>
>
>
>

>
> Ernest
>
> Hasko Heinecke <[hidden email]> wrote in message
> news:[hidden email]...
> >
> > "Blair McGlashan" <[hidden email]> wrote
> > > > > We are currently working on a replacement compiler
> > > >
> > > > In Smalltalk? Will it be part of the usual sources? Cool.
> > >
> > > Yes and yes.
> >
> > Will it include VW-like features such as automatic temp var insertion

> > name correction? I guess, at least it could be added then.
> >
> > Hasko
> >
> >
> >
> >
> >
>
>