I would also think we have some unit tests that validate the random generator.
> On 29 Jun 2016, at 10:07, Max Leske <maxle...@gmail.com> wrote: > > Same here of OS X 10.11 in Pharo 6. Not reproducible. > > Max > >> On 29 Jun 2016, at 09:34, Ben Coman <b...@openinworld.com> 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 <esteba...@gmail.com> 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 >> <pharo-dev@lists.pharo.org> wrote: >>> >>> >>> ---------- Forwarded message ---------- >>> From: Benoit St-Jean <bstj...@yahoo.com> >>> To: Pharo Development List <pharo-dev@lists.pharo.org> >>> 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 <esteba...@gmail.com> 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 <esteba...@gmail.com> 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) >>> >> > >
