Random number generator bug?

>
>
> ---------- Forwarded message ----------
> From: Benoit St-Jean <[hidden email]>
> To: Pharo Development List <[hidden email]>
> Cc:
> Date: Wed, 29 Jun 2016 04:13:57 +0000 (UTC)
> Subject: Random number generator bug?
> I'm having problems understanding why the Integer>>#atRandom sometimes return a number greater than the receiver.
>
> This problem only occurs when forking processes that generate random number using the above mentioned method.  Obviously, all processes share the same RNG from the Collection class.
>
> Code below can reproduce (most of the time) the bug.
>
> | n |
> n := 3172918.
> 5 timesRepeat: [ [n timesRepeat: [ | alea |
>                                     alea := n atRandom.
>                                     (alea > n) ifTrue: [ self halt]]] forkAt: Processor userBackgroundPriority ].
>
> I'm on Windows 10, Pharo4.0 Latest update: #40627.
>
> Pertinent System Reporter info below:
>
> Virtual Machine
> ---------------
> F:\Pharo4\Pharo4.0\Pharo.exe
> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
> https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>
> Win32 built on Sep 25 2014 17:47:04 Compiler: 4.6.2
> VMMaker versionString https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>
> Loaded VM Modules
> -----------------
> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FT2Plugin Freetype-Plugin-IgorStasenko.64 (e)
> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Kernel32
> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>
> VM Built-in Modules
> -------------------
> ADPCMCodecPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> AsynchFilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> B3DAcceleratorPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> BMPReadWriterPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> CroquetPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> DSAPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
> DropPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FFTPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> FloatMathPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> HostWindowPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> IA32ABI VMMaker.oscog-jeanbaptistearnaud.783 (i)
> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> JPEGReaderPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> JoystickTabletPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Klatt VMMaker.oscog-jeanbaptistearnaud.783 (i)
> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> MIDIPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Mpeg3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
> RePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SerialPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SocketPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SoundCodecPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SoundPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> StarSqueakPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> SurfacePlugin Sep 25 2014 (i)
> UUIDPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
> Win32OSProcessPlugin VMConstruction-Plugins-OSProcessPlugin.oscog-EstebanLorenzano.43 (i)
> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>
> VM Configuration
> ----------------
> F:\Pharo4\Pharo4.0\Pharo.ini
> [Global]
> DeferUpdate=1
> ShowConsole=0
> DynamicConsole=1
> ReduceCPUUsage=0
> ReduceCPUInBackground=0
> 3ButtonMouse=0
> 1ButtonMouse=0
> UseDirectSound=1
> PriorityBoost=0
> B3DXUsesOpenGL=0
> CaseSensitiveFileMode=0
>
> Operating System/Hardware
> -------------------------
> Win32 6.2 IX86
>
> Hardware Details
> ----------------
> Hardware information:
>     Manufacturer: Unknown
>     Model: Unknown
>     Number of processors: 4
>     Page size: 4096
>
> Memory Information (upon launch):
>     Physical Memory Size: 2097151 kbytes
>     Physical Memory Free: 2097151 kbytes
>     Page File Size: 4194303 kbytes
>     Page File Free: 4194303 kbytes
>     Virtual Memory Size: 2097024 kbytes
>     Virtual Memory Free: 2015568 kbytes
>     Memory Load: 45 percent
>
> Processor 0: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>     Identifier: Intel64 Family 6 Model 94 Stepping 3
>     ~MHZ: 2712
>
> Processor 1: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>     Identifier: Intel64 Family 6 Model 94 Stepping 3
>     ~MHZ: 2712
>
> Processor 2: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>     Identifier: Intel64 Family 6 Model 94 Stepping 3
>     ~MHZ: 2712
>
> Processor 3: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>     Identifier: Intel64 Family 6 Model 94 Stepping 3
>     ~MHZ: 2712
>
> Graphics Hardware Details
> -------------------------
> Display Information:
>     Graphics adapter name: Intel(R) HD Graphics 530
>     Primary monitor resolution: 1280 x 720
>
> Device: ???
>     Adapter String: Intel(R) HD Graphics 530
>     Bios String: Intel Video BIOS
>     Chip Type: Intel(R) HD Graphics Family
>     DAC Type: Internal
>     Memory Size: 0x40000000
>
> Driver Versions:
>     igdumdim64:
>
>
>
>
>
> -----------------
> Benoît St-Jean
> Yahoo! Messenger: bstjean
> Twitter: @BenLeChialeux
> Pinterest: benoitstjean
> Instagram: Chef_Benito
> IRC: lamneth
> Blogue: endormitoire.wordpress.com
> "A standpoint is an intellectual horizon of radius zero".  (A. Einstein)
>

> On 29 Jun 2016, at 09:34, Ben Coman <[hidden email]> wrote:
>
> On Windows 7,  I tried two case and could not reproduce this.
>
> 1. Pharo-40611
> C:\#Pharo\Pharo4.0\Pharo.exe
> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>
> Note the same VM as yours
>
> 2. Pharo-50554
> C:\#Pharo\PharoSpur\Pharo.exe
> CoInterpreter VMMaker.oscog-eem.1630 uuid:
> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
> StackToRegisterMappingCogit VMMaker.oscog-eem.1630 uuid:
> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
> https://github.com/estebanlm/pharo-vm.git Commit:
> 21ec004cce7d26010c18d357c805a0e1a4ffe376 Date: 2016-01-14 11:42:33
> +0100 By: Esteban Lorenzano <[hidden email]> Jenkins build #498
>
> Could you try some other combinations of machine/VM/image?
>
> cheers -ben
>
> On Wed, Jun 29, 2016 at 12:15 PM, Benoit St-Jean via Pharo-dev
> <[hidden email]> wrote:
>>
>>
>> ---------- Forwarded message ----------
>> From: Benoit St-Jean <[hidden email]>
>> To: Pharo Development List <[hidden email]>
>> Cc:
>> Date: Wed, 29 Jun 2016 04:13:57 +0000 (UTC)
>> Subject: Random number generator bug?
>> I'm having problems understanding why the Integer>>#atRandom sometimes return a number greater than the receiver.
>>
>> This problem only occurs when forking processes that generate random number using the above mentioned method.  Obviously, all processes share the same RNG from the Collection class.
>>
>> Code below can reproduce (most of the time) the bug.
>>
>> | n |
>> n := 3172918.
>> 5 timesRepeat: [ [n timesRepeat: [ | alea |
>>                                    alea := n atRandom.
>>                                    (alea > n) ifTrue: [ self halt]]] forkAt: Processor userBackgroundPriority ].
>>
>> I'm on Windows 10, Pharo4.0 Latest update: #40627.
>>
>> Pertinent System Reporter info below:
>>
>> Virtual Machine
>> ---------------
>> F:\Pharo4\Pharo4.0\Pharo.exe
>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>> https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>>
>> Win32 built on Sep 25 2014 17:47:04 Compiler: 4.6.2
>> VMMaker versionString https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>
>> Loaded VM Modules
>> -----------------
>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FT2Plugin Freetype-Plugin-IgorStasenko.64 (e)
>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Kernel32
>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>
>> VM Built-in Modules
>> -------------------
>> ADPCMCodecPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> AsynchFilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> B3DAcceleratorPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> BMPReadWriterPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> CroquetPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> DSAPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> DropPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FFTPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> FloatMathPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> HostWindowPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> IA32ABI VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> JPEGReaderPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> JoystickTabletPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Klatt VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> MIDIPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Mpeg3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>> RePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SerialPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SocketPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SoundCodecPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SoundPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> StarSqueakPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> SurfacePlugin Sep 25 2014 (i)
>> UUIDPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>> Win32OSProcessPlugin VMConstruction-Plugins-OSProcessPlugin.oscog-EstebanLorenzano.43 (i)
>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>
>> VM Configuration
>> ----------------
>> F:\Pharo4\Pharo4.0\Pharo.ini
>> [Global]
>> DeferUpdate=1
>> ShowConsole=0
>> DynamicConsole=1
>> ReduceCPUUsage=0
>> ReduceCPUInBackground=0
>> 3ButtonMouse=0
>> 1ButtonMouse=0
>> UseDirectSound=1
>> PriorityBoost=0
>> B3DXUsesOpenGL=0
>> CaseSensitiveFileMode=0
>>
>> Operating System/Hardware
>> -------------------------
>> Win32 6.2 IX86
>>
>> Hardware Details
>> ----------------
>> Hardware information:
>>    Manufacturer: Unknown
>>    Model: Unknown
>>    Number of processors: 4
>>    Page size: 4096
>>
>> Memory Information (upon launch):
>>    Physical Memory Size: 2097151 kbytes
>>    Physical Memory Free: 2097151 kbytes
>>    Page File Size: 4194303 kbytes
>>    Page File Free: 4194303 kbytes
>>    Virtual Memory Size: 2097024 kbytes
>>    Virtual Memory Free: 2015568 kbytes
>>    Memory Load: 45 percent
>>
>> Processor 0: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>    Identifier: Intel64 Family 6 Model 94 Stepping 3
>>    ~MHZ: 2712
>>
>> Processor 1: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>    Identifier: Intel64 Family 6 Model 94 Stepping 3
>>    ~MHZ: 2712
>>
>> Processor 2: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>    Identifier: Intel64 Family 6 Model 94 Stepping 3
>>    ~MHZ: 2712
>>
>> Processor 3: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>    Identifier: Intel64 Family 6 Model 94 Stepping 3
>>    ~MHZ: 2712
>>
>> Graphics Hardware Details
>> -------------------------
>> Display Information:
>>    Graphics adapter name: Intel(R) HD Graphics 530
>>    Primary monitor resolution: 1280 x 720
>>
>> Device: ???
>>    Adapter String: Intel(R) HD Graphics 530
>>    Bios String: Intel Video BIOS
>>    Chip Type: Intel(R) HD Graphics Family
>>    DAC Type: Internal
>>    Memory Size: 0x40000000
>>
>> Driver Versions:
>>    igdumdim64:
>>
>>
>>
>>
>>
>> -----------------
>> Benoît St-Jean
>> Yahoo! Messenger: bstjean
>> Twitter: @BenLeChialeux
>> Pinterest: benoitstjean
>> Instagram: Chef_Benito
>> IRC: lamneth
>> Blogue: endormitoire.wordpress.com
>> "A standpoint is an intellectual horizon of radius zero".  (A. Einstein)
>>
>

>
> Max
>
>> On 29 Jun 2016, at 09:34, Ben Coman <[hidden email]> wrote:
>>
>> On Windows 7,  I tried two case and could not reproduce this.
>>
>> 1. Pharo-40611
>> C:\#Pharo\Pharo4.0\Pharo.exe
>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
>> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
>> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>
>> Note the same VM as yours
>>
>> 2. Pharo-50554
>> C:\#Pharo\PharoSpur\Pharo.exe
>> CoInterpreter VMMaker.oscog-eem.1630 uuid:
>> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
>> StackToRegisterMappingCogit VMMaker.oscog-eem.1630 uuid:
>> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
>> https://github.com/estebanlm/pharo-vm.git Commit:
>> 21ec004cce7d26010c18d357c805a0e1a4ffe376 Date: 2016-01-14 11:42:33
>> +0100 By: Esteban Lorenzano <[hidden email]> Jenkins build #498
>>
>> Could you try some other combinations of machine/VM/image?
>>
>> cheers -ben
>>
>> On Wed, Jun 29, 2016 at 12:15 PM, Benoit St-Jean via Pharo-dev
>> <[hidden email]> wrote:
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Benoit St-Jean <[hidden email]>
>>> To: Pharo Development List <[hidden email]>
>>> Cc:
>>> Date: Wed, 29 Jun 2016 04:13:57 +0000 (UTC)
>>> Subject: Random number generator bug?
>>> I'm having problems understanding why the Integer>>#atRandom sometimes return a number greater than the receiver.
>>>
>>> This problem only occurs when forking processes that generate random number using the above mentioned method.  Obviously, all processes share the same RNG from the Collection class.
>>>
>>> Code below can reproduce (most of the time) the bug.
>>>
>>> | n |
>>> n := 3172918.
>>> 5 timesRepeat: [ [n timesRepeat: [ | alea |
>>>                                   alea := n atRandom.
>>>                                   (alea > n) ifTrue: [ self halt]]] forkAt: Processor userBackgroundPriority ].
>>>
>>> I'm on Windows 10, Pharo4.0 Latest update: #40627.
>>>
>>> Pertinent System Reporter info below:
>>>
>>> Virtual Machine
>>> ---------------
>>> F:\Pharo4\Pharo4.0\Pharo.exe
>>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>>>
>>> Win32 built on Sep 25 2014 17:47:04 Compiler: 4.6.2
>>> VMMaker versionString https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>>
>>> Loaded VM Modules
>>> -----------------
>>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FT2Plugin Freetype-Plugin-IgorStasenko.64 (e)
>>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Kernel32
>>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>>
>>> VM Built-in Modules
>>> -------------------
>>> ADPCMCodecPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> AsynchFilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> B3DAcceleratorPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BMPReadWriterPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> CroquetPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> DSAPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> DropPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FFTPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatMathPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> HostWindowPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> IA32ABI VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReaderPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JoystickTabletPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Klatt VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MIDIPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Mpeg3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>>> RePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SerialPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SocketPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SoundCodecPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SoundPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> StarSqueakPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SurfacePlugin Sep 25 2014 (i)
>>> UUIDPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Win32OSProcessPlugin VMConstruction-Plugins-OSProcessPlugin.oscog-EstebanLorenzano.43 (i)
>>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>>
>>> VM Configuration
>>> ----------------
>>> F:\Pharo4\Pharo4.0\Pharo.ini
>>> [Global]
>>> DeferUpdate=1
>>> ShowConsole=0
>>> DynamicConsole=1
>>> ReduceCPUUsage=0
>>> ReduceCPUInBackground=0
>>> 3ButtonMouse=0
>>> 1ButtonMouse=0
>>> UseDirectSound=1
>>> PriorityBoost=0
>>> B3DXUsesOpenGL=0
>>> CaseSensitiveFileMode=0
>>>
>>> Operating System/Hardware
>>> -------------------------
>>> Win32 6.2 IX86
>>>
>>> Hardware Details
>>> ----------------
>>> Hardware information:
>>>   Manufacturer: Unknown
>>>   Model: Unknown
>>>   Number of processors: 4
>>>   Page size: 4096
>>>
>>> Memory Information (upon launch):
>>>   Physical Memory Size: 2097151 kbytes
>>>   Physical Memory Free: 2097151 kbytes
>>>   Page File Size: 4194303 kbytes
>>>   Page File Free: 4194303 kbytes
>>>   Virtual Memory Size: 2097024 kbytes
>>>   Virtual Memory Free: 2015568 kbytes
>>>   Memory Load: 45 percent
>>>
>>> Processor 0: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 1: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 2: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 3: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Graphics Hardware Details
>>> -------------------------
>>> Display Information:
>>>   Graphics adapter name: Intel(R) HD Graphics 530
>>>   Primary monitor resolution: 1280 x 720
>>>
>>> Device: ???
>>>   Adapter String: Intel(R) HD Graphics 530
>>>   Bios String: Intel Video BIOS
>>>   Chip Type: Intel(R) HD Graphics Family
>>>   DAC Type: Internal
>>>   Memory Size: 0x40000000
>>>
>>> Driver Versions:
>>>   igdumdim64:
>>>
>>>
>>>
>>>
>>>
>>> -----------------
>>> Benoît St-Jean
>>> Yahoo! Messenger: bstjean
>>> Twitter: @BenLeChialeux
>>> Pinterest: benoitstjean
>>> Instagram: Chef_Benito
>>> IRC: lamneth
>>> Blogue: endormitoire.wordpress.com
>>> "A standpoint is an intellectual horizon of radius zero".  (A. Einstein)
>>>
>>
>

> On 29 Jun 2016, at 10:07, Max Leske <[hidden email]> wrote:
>
> Same here of OS X 10.11 in Pharo 6. Not reproducible.
>
> Max
>
>> On 29 Jun 2016, at 09:34, Ben Coman <[hidden email]> wrote:
>>
>> On Windows 7,  I tried two case and could not reproduce this.
>>
>> 1. Pharo-40611
>> C:\#Pharo\Pharo4.0\Pharo.exe
>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
>> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid:
>> e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>
>> Note the same VM as yours
>>
>> 2. Pharo-50554
>> C:\#Pharo\PharoSpur\Pharo.exe
>> CoInterpreter VMMaker.oscog-eem.1630 uuid:
>> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
>> StackToRegisterMappingCogit VMMaker.oscog-eem.1630 uuid:
>> 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016
>> https://github.com/estebanlm/pharo-vm.git Commit:
>> 21ec004cce7d26010c18d357c805a0e1a4ffe376 Date: 2016-01-14 11:42:33
>> +0100 By: Esteban Lorenzano <[hidden email]> Jenkins build #498
>>
>> Could you try some other combinations of machine/VM/image?
>>
>> cheers -ben
>>
>> On Wed, Jun 29, 2016 at 12:15 PM, Benoit St-Jean via Pharo-dev
>> <[hidden email]> wrote:
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Benoit St-Jean <[hidden email]>
>>> To: Pharo Development List <[hidden email]>
>>> Cc:
>>> Date: Wed, 29 Jun 2016 04:13:57 +0000 (UTC)
>>> Subject: Random number generator bug?
>>> I'm having problems understanding why the Integer>>#atRandom sometimes return a number greater than the receiver.
>>>
>>> This problem only occurs when forking processes that generate random number using the above mentioned method.  Obviously, all processes share the same RNG from the Collection class.
>>>
>>> Code below can reproduce (most of the time) the bug.
>>>
>>> | n |
>>> n := 3172918.
>>> 5 timesRepeat: [ [n timesRepeat: [ | alea |
>>>                                   alea := n atRandom.
>>>                                   (alea > n) ifTrue: [ self halt]]] forkAt: Processor userBackgroundPriority ].
>>>
>>> I'm on Windows 10, Pharo4.0 Latest update: #40627.
>>>
>>> Pertinent System Reporter info below:
>>>
>>> Virtual Machine
>>> ---------------
>>> F:\Pharo4\Pharo4.0\Pharo.exe
>>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>>>
>>> Win32 built on Sep 25 2014 17:47:04 Compiler: 4.6.2
>>> VMMaker versionString https://github.com/pharo-project/pharo-vm.git Commit: 81b5d19917dcb78f22482a780deec48c53738396 Date: 2014-09-20 14:36:18 +0200 By: Esteban Lorenzano <[hidden email]> Jenkins build #14858
>>> NBCoInterpreter NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>> NBCogit NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 uuid: e0df6e2d-5694-40e2-8035-dc217200b424 Sep 25 2014
>>>
>>> Loaded VM Modules
>>> -----------------
>>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FT2Plugin Freetype-Plugin-IgorStasenko.64 (e)
>>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Kernel32
>>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>>
>>> VM Built-in Modules
>>> -------------------
>>> ADPCMCodecPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> AsynchFilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> B2DPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> B3DAcceleratorPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BMPReadWriterPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> BitBltPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> CroquetPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> DSAPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> DropPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FFTPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FilePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatArrayPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> FloatMathPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> HostWindowPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> IA32ABI VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReadWriter2Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JPEGReaderPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> JoystickTabletPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Klatt VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LargeIntegers v1.5 VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> LocalePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MIDIPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Matrix2x3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> MiscPrimitivePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Mpeg3Plugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> NativeBoostPlugin NativeBoost-CogPlugin-HolgerHansPeterFreyther.21 (i)
>>> RePlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SecurityPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SerialPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SocketPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SoundCodecPrims VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SoundPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> StarSqueakPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> SurfacePlugin Sep 25 2014 (i)
>>> UUIDPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>> Win32OSProcessPlugin VMConstruction-Plugins-OSProcessPlugin.oscog-EstebanLorenzano.43 (i)
>>> ZipPlugin VMMaker.oscog-jeanbaptistearnaud.783 (i)
>>>
>>> VM Configuration
>>> ----------------
>>> F:\Pharo4\Pharo4.0\Pharo.ini
>>> [Global]
>>> DeferUpdate=1
>>> ShowConsole=0
>>> DynamicConsole=1
>>> ReduceCPUUsage=0
>>> ReduceCPUInBackground=0
>>> 3ButtonMouse=0
>>> 1ButtonMouse=0
>>> UseDirectSound=1
>>> PriorityBoost=0
>>> B3DXUsesOpenGL=0
>>> CaseSensitiveFileMode=0
>>>
>>> Operating System/Hardware
>>> -------------------------
>>> Win32 6.2 IX86
>>>
>>> Hardware Details
>>> ----------------
>>> Hardware information:
>>>   Manufacturer: Unknown
>>>   Model: Unknown
>>>   Number of processors: 4
>>>   Page size: 4096
>>>
>>> Memory Information (upon launch):
>>>   Physical Memory Size: 2097151 kbytes
>>>   Physical Memory Free: 2097151 kbytes
>>>   Page File Size: 4194303 kbytes
>>>   Page File Free: 4194303 kbytes
>>>   Virtual Memory Size: 2097024 kbytes
>>>   Virtual Memory Free: 2015568 kbytes
>>>   Memory Load: 45 percent
>>>
>>> Processor 0: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 1: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 2: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Processor 3: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
>>>   Identifier: Intel64 Family 6 Model 94 Stepping 3
>>>   ~MHZ: 2712
>>>
>>> Graphics Hardware Details
>>> -------------------------
>>> Display Information:
>>>   Graphics adapter name: Intel(R) HD Graphics 530
>>>   Primary monitor resolution: 1280 x 720
>>>
>>> Device: ???
>>>   Adapter String: Intel(R) HD Graphics 530
>>>   Bios String: Intel Video BIOS
>>>   Chip Type: Intel(R) HD Graphics Family
>>>   DAC Type: Internal
>>>   Memory Size: 0x40000000
>>>
>>> Driver Versions:
>>>   igdumdim64:
>>>
>>>
>>>
>>>
>>>
>>> -----------------
>>> Benoît St-Jean
>>> Yahoo! Messenger: bstjean
>>> Twitter: @BenLeChialeux
>>> Pinterest: benoitstjean
>>> Instagram: Chef_Benito
>>> IRC: lamneth
>>> Blogue: endormitoire.wordpress.com
>>> "A standpoint is an intellectual horizon of radius zero".  (A. Einstein)
>>>
>>
>
>