[Help-smalltalk] further tests Re: Float printString?

[Robert Kuszinger]

Dear Holger,

I've checked the Float class source and narrowed the error to this
scenario, which is a differend code point but raises the same error:

(start gst in command line and enter the following:)

2 raisedToInteger: (-0.00019623982224262149)  exponent -
(-0.00019623982224262149) class precision + 1

Going into details:

st>(-0.00019623982224262149)  exponent
-13



st> (-0.00019623982224262149) class precision
53
st> (-0.00019623982224262149) class precision + 1
54

So, -13 - 54 = -67

2^(-67) with calculator:       2^(-67) = 6.7762636e-21


Evaluating the following leads to the same:

st> 2 raisedToInteger: -67
Object: 1 error: The program attempted to divide a number by zero
ZeroDivide(Exception)>>signal (ExcHandling.st:254)
SmallInteger(Number)>>zeroDivide (SysExcept.st:1386)
Fraction>>setNumerator:setDenominator: (Fraction.st:485)
Fraction class>>numerator:denominator: (Fraction.st:66)
Fraction>>raisedToInteger: (Fraction.st:510)
SmallInteger(Number)>>raisedToInteger: (Number.st:922)
UndefinedObject>>executeStatements (a String:1)


best regards
Robert




2016-07-06 12:08 GMT+02:00 Holger Freyther <address@hidden>:

>
> > On 06 Jul 2016, at 10:44, Robert Kuszinger <address@hidden> wrote:
> >
> > Hello!
> >
> > I've made a script to perform GRASS GIS operations automatically.
> > It was running for weeks nicely.
> >
> > Today it emerged:
> >
> > Object: 1 error: The program attempted to divide a number by zero
>
>
>
> > ZeroDivide(Exception)>>signal (ExcHandling.st:254)
> > SmallInteger(Number)>>zeroDivide (SysExcept.st:1386)
> > Fraction>>setNumerator:setDenominator: (Fraction.st:485)
> > Fraction class>>numerator:denominator: (Fraction.st:66)
> > Fraction>>raisedToInteger: (Fraction.st:510)
>
> so the denominator is 0? Can you use >>#inspect on your float to see what
> your float looks like?
>
> holger