[Vm-dev] vm crash when using rairedTo: with fractions

Eliot Miranda eliot.miranda at gmail.com
Thu Aug 10 22:55:31 UTC 2017

Hi Andrei,

On Thu, Aug 10, 2017 at 3:02 AM, Andrei Chis <chisvasileandrei at gmail.com>

> Hi,
> I was executing this code  '(2009/2000) ** (3958333/100000)' with the
> Pharo6.1 distribution and the vm crashed with she stack attached below.
> Tried it on both mac and windows 10.
> Seems that #raisedTo: has a special case for fractions that ends up
> calling #nthRoot: like '2009 nthRoot: 100000' leading to the crash.

The plugin is now fixed; see VMMaker.oscog-eem.2262.  I'll generate code
soon (am debugging something you're familiar with that takes several hours
to run and don't want to generate sources while it's running).  But I'm
glad you've found a better way!  This case creates 600k byte large integers
and takes forever to run :-)

> Cheers,
> Andrei
> 0xaddeac M LargePositiveInteger(Integer)>quo: 0x314093e8: a(n)
> LargePositiveInteger
> 0xaddec8 M LargePositiveInteger(LargeInteger)>quo: 0x314093e8: a(n)
> LargePositiveInteger
> 0xaddee8 M LargePositiveInteger(Integer)>// 0x314093e8: a(n)
> LargePositiveInteger
> 0xaddf04 M LargePositiveInteger(LargeInteger)>// 0x314093e8: a(n)
> LargePositiveInteger
> 0xaddf34 I LargePositiveInteger(Integer)>nthRootTruncated: 0x30cc8350:
> a(n) LargePositiveInteger
> 0xaddf5c I LargePositiveInteger(Integer)>nthRootRounded: 0x30cc8350: a(n)
> LargePositiveInteger
> 0xaddf88 I SmallInteger(Integer)>nthRoot: 0xfb3=2009
> 0xaddfb4 I Fraction>nthRoot: 0x4f9a940: a(n) Fraction
> 0xaddfd8 I Fraction(Number)>raisedTo: 0x4f9a940: a(n) Fraction
> 0xaddffc I Fraction(Number)>** 0x4f9a940: a(n) Fraction
> 0xade018 M UndefinedObject>DoIt 0x5fe5d00: a(n) UndefinedObject
> 0xade048 I OpalCompiler>evaluate 0x4f9a998: a(n) OpalCompiler
> 0xade074 I RubSmalltalkEditor>evaluate:andDo: 0x305e5878: a(n)
> RubSmalltalkEditor
> 0xade09c I RubSmalltalkEditor>highlightEvaluateAndDo: 0x305e5878: a(n)
> RubSmalltalkEditor
> 0xade0b8 M GLMMorphicPharoScriptRenderer(GLMMorphicPharoCodeRenderer)>popupPrint
> 0x3062fdc8: a(n) GLMMorphicPharoScri
> enderer
> 0xade0d8 I MorphicAlarm(MessageSend)>value 0x4f9ab20: a(n) MorphicAlarm
> 0xade0f4 M MorphicAlarm>value: 0x4f9ab20: a(n) MorphicAlarm
> 0xade114 M WorldState>triggerAlarmsBefore: 0x71bb5e0: a(n) WorldState
> 0xade140 M WorldState>runLocalStepMethodsIn: 0x71bb5e0: a(n) WorldState
> 0xade164 M WorldState>runStepMethodsIn: 0x71bb5e0: a(n) WorldState
> 0xade180 M WorldMorph>runStepMethods 0x6ab7778: a(n) WorldMorph
> 0xade198 M WorldState>doOneCycleNowFor: 0x71bb5e0: a(n) WorldState
> 0xade1b4 M WorldState>doOneCycleFor: 0x71bb5e0: a(n) WorldState
> 0xade1d0 M WorldMorph>doOneCycle 0x6ab7778: a(n) WorldMorph
> 0xade1e8 M WorldMorph class>doOneCycle 0x6a9f960: a(n) WorldMorph class
> 0xade200 M [] in MorphicUIManager>spawnNewProcess 0x2cc88718: a(n)
> MorphicUIManager
> 0xade220 I [] in BlockClosure>newProcess 0x2f178150: a(n) BlockClosure

best, Eliot
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