- Pharo-dev - lists.pharo.org

Re: [Pharo-dev] Segmentation fault while installing Scale
by Andrey Tykhonov Feb. 10, 2017

Feb. 10, 2017

Hi Clement, > Hi Andrey, > Thanks for providing both a way to reproduce and the log so we can have you > machine details. I see that the VM was compiled from build #589 on jenkins > with VMMaker.oscog-eem.1855 and you're on Linux using x86 back-end. > Scale works only on Linux and when I try the wget command from Mac it does > not work so I can't reproduce right now. > I suggest that for now you try to use one of the newer VMs (from > http://files.pharo.org/vm/pharo-spur32/linux/ , you're > using stable-20160504.zip, pick another one, It seems, the latest VM is downloaded. It is downloaded by means of the following command: wget -O - get.pharo.org/50+vm | bash Does it download old VM. Is this script outdated? I suggest a more recent one > than from May last year, either stable-20160623.zip > or pharo-linux-i386itimer-201702061308-aa78f27.zip) and then use the > "classic installation" to be able to use another VM than the one downloaded > by the wget script until someone can have a look into your problem. Could you please help, where could I get Pharo.image file which is required to execute pharo/pharo-ui? If I use existing one (with a VM taken from either stable-20160623.zip or pharo-linux-i386itimer-201702061308-aa78f27.zip), the VM crashes. So, it seems, I need another Pharo.image as well, right? With the best regards, Andriy

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Re: [Pharo-dev] Segmentation fault while installing Scale
by Andrey Tykhonov Feb. 10, 2017

Feb. 10, 2017

Hi stephane > can you tell us on which OS and version This is Gentoo Linux. There is no such a thing like a version. There are kernel and a lot of software. Kernel version: # uname -a Linux tp 4.9.6-gentoo #1 SMP Thu Jan 26 17:04:47 EET 2017 x86_64 Intel(R) Core(TM) i7-6700HQ CPU @ 2 I found crash.dmp near pharo-ui,.60GHz GenuineIntel GNU/Linux Let me know please if I could provide more info on this matter. > and which VM do you use (there is a System report browser where you can find the information. It is downloaded by means of the command: wget -O - get.pharo.org/50+vm | bash AFAIU, the latest VM is downloaded by means of this command. I opened pharo-ui: ./pharo-ui Pharo.image > pharo.log and it was opened for a while, but it crashed when I tried to get information from System report browser. After that, I cannot open pharo-ui anymore. Two log files are attached to this email. Best regards, Andriy

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Re: [Pharo-dev] Integer arithmetic and bit counting performance in Squeak and Pharo
by ClÃ©ment Bera Feb. 10, 2017

Feb. 10, 2017

Hi, This is a lovely post. Thanks for posting about Smalltalk / Pharo / Squeak. 1. Why *exactly* does the override work (in 32bit images)? 2. What changed so that things are different in Squeak 5.1 64bit image (overrides partially work)? If I am correct your questions are exclusively for bitOr: and bitAnd:. I don't know what you are aware of and what you're not aware of, hence I am going to give you some details on how bitAnd: is executed (bitOr: is done exactly the same way), and hopefully there will be something you don't know yet that should help you understand what's going on. *Execution of bitAnd:* bitAnd: a special selector. If you run Smalltalk specialSelectors you get this array: #(#+ 1 #- 1 #< 1 #> 1 #<= 1 #>= 1 #= 1 #~= 1 #* 1 #/ 1 #\\ 1 #@ 1 #bitShift: 1 #// 1 #bitAnd: 1 #bitOr: 1 #at: 1 #at:put: 2 #size 0 #next 0 #nextPut: 1 #atEnd 0 #== 1 #class 0 #blockCopy: 1 #value 0 #value: 1 #do: 1 #new 0 #new: 1 #x 0 #y 0) which includes bitAnd: . Special selectors are encoded in the bytecode differently to save memory, so they can be executed differently without inducing overhead. In Cog, bitAnd: is executed differently using type-prediction. In the Stack Interpreter, the execution of bitAnd: is done as follows: If both operands are SmallIntegers, push the bitAnd: value of the 2 SmallIntegers else Try the primitive BitAnd for SmallIntegers (14) on success push the result on failure perform the send. In the JIT, bitAnd: sends are compiled differently that normal send, the compilation logic is as follows: If both operands are SmallInteger literals compute the result during compilation and use this value else If one of the 2 operands is a SmallInteger literal generate 2 paths, a quick inlined path testing at runtime that the other operand is a SmallInteger, and if so, Ands the operands and use that result, else use the slow path performing a send else generate a normal send *Primitives* primitive 14 -> Works for SmallIntegers and LargePositiveInteger fitting in an unsigned machine word. (Slower than direct SmallInteger bitAnd performed by the special selector) primitive 34 -> Works for SmallIntegers and LargePositiveInteger fitting in an unsigned int64. (Slower than primitive 14 in 32 bits but covering more cases, equivalent in 64 bits) primDigitBitAnd (in Integer) -> Works for any integer. (Slower than the primitive 14 and 34) *SmallInteger encoding* In 32 bits, SmallIntegers are signed 31bits integer. In 64 bits, SmallIntegers are signed 61 bits integer. *Discussion* Let's make some assertions based on previous information: 1) If you have the exact same bitAnd: implementation for #bitAnd: and #bitAnd2:, #bitAnd2: is slower because it is not a special selector. 2) Still with the exact same bitAnd: implementation, using the JIT, things like that: 16r1 bitAnd: 1. "1 bits" 16r2 bitAnd: 2. "2 bit" 16r4 bitAnd: 4. "3 bit" 16r8 bitAnd: 3. "4 bit" Are bitAnd: operations between SmallInteger constants and the result is unused. Hence this whole portion of code does not generate any native instructions. On the other hand, things like that: 16r1 bitAnd2: 1. "1 bits" 16r2 bitAnd2: 2. "2 bit" 16r4 bitAnd2: 4. "3 bit" 16r8 bitAnd2: 3. "4 bit" Are sends, generating multiple native instructions including calls. 3) Because of the SmallInteger encoding, 16r200000000000000 bitAnd: 98490667780264321. "58 bit" is compiled by the JIT to nothing in 64 bits but to a send in 32 bits (the JIT can't solve LargeInteger arithmetic at compilation time). 4) primitive 34 provides some speed-up over primitive 14 in 32 bits, covering bitAnd: operations from unsigned 33 bits integer to unsigned 64 bits integer, but makes no difference in 64 bits. In 64bits all the cases covered by primitive 34 are covered by primitive 14, so it should even slow down things. *So...* Does this answer your questions ? Don't hesitate to ask further questions. If you want more details, I wrote something about special selectors a while ago: https://clementbera.wordpress.com/2014/08/12/arithmetic-inlined-and-special… . Best, Clement PS1: If I'm correct, you referenced my blog a couple times, thank you for doing this, I really appreciate that. PS2: I enjoy chess myself, so if you have an open-source/MIT working algorithm at some point please send it to me, I will play against the AI and look at the code. On Fri, Feb 10, 2017 at 8:18 AM, Benoit St-Jean via Pharo-dev < pharo-dev(a)lists.pharo.org> wrote: > > > ---------- Forwarded message ---------- > From: Benoit St-Jean <bstjean(a)yahoo.com> > To: The General-purpose Squeak Developers List <squeak-dev@lists. > squeakfoundation.org>, "pharo-dev(a)lists.pharo.org" < > pharo-dev(a)lists.pharo.org> > Cc: > Date: Fri, 10 Feb 2017 07:18:02 +0000 (UTC) > Subject: Integer arithmetic and bit counting performance in Squeak and > Pharo > For those interested in performance of bit operations and integer > arithmetic in Squeak and Pharo : > > Bit operations in general : https://endormitoire.wordpress > .com/2017/02/10/bits-and-pieces/ > > Bit counting algorithms : https://endormitoire.wordpress > .com/2017/02/10/1001001-sos/ > > Some questions, some results, some answers... > > ----------------- > BenoÃ®t 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) > >

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GSOC Pharo application done
by Serge Stinckwich Feb. 10, 2017

Feb. 10, 2017

Dear all, thanks to the efforts of Jigyasa Grover, Yuriy Tymchuk and Alexandre Bergel, , we were able to have a GSOC 2017 application for the Pharo Consortium. This is only the first phase. If we are selected by Google, they will give some slots for students. We have a list of projects for GSOC here : http://gsoc.pharo.org/ If you have more ideas, please send them to me or send a PR on : https://github.com/pharo-project/pharo-project-proposals/blob/master/Topics… Try to describe your project idea with 10-15 lines maximum. The ideas is not too much projects proposals but to find important projects for the Pharo community (i.e that will have some impact for the community) with the support of the appropriate mentors. I would like to have maximum 2-3 projects for each mentors. Thank you. Cheers, -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

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Re: [Pharo-dev] [Pharo-users] Final rush for submitting GSOC proposal - Need your help
by Serge Stinckwich Feb. 10, 2017

Feb. 10, 2017

On Thu, Feb 9, 2017 at 5:28 PM, Stephan Eggermont <stephan(a)stack.nl> wrote: > On 09/02/17 17:05, Serge Stinckwich wrote: >> >> but all the projects are coming from RMOD team, but having all the >> projects proposal coming from the same place might be perceived >> negatively from Google. Can we add more projects from previous gsoc >> from other people also ? > > > My two earlier proposals are fine, and already on the site. Can you reduce the size of the "Distributed Issue Tracker" subject because there is too much details compared to other subjects. Thank you. -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

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[pharo-project/pharo-core]
by GitHub Feb. 10, 2017

Feb. 10, 2017

Branch: refs/tags/60385 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] 6f7d16: 60385
by GitHub Feb. 10, 2017

Feb. 10, 2017

Branch: refs/heads/6.0 Home: https://github.com/pharo-project/pharo-core Commit: 6f7d16ed3df7bcc4a19e70a4bd785be161281e52 https://github.com/pharo-project/pharo-core/commit/6f7d16ed3df7bcc4a19e70a4… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2017-02-10 (Fri, 10 Feb 2017) Changed paths: M ConfigurationOfEpicea.package/ConfigurationOfEpicea.class/instance/tags/stable_.st A ConfigurationOfEpicea.package/ConfigurationOfEpicea.class/instance/versions/version810_.st A ConfigurationOfEpicea.package/ConfigurationOfEpicea.class/instance/versions/version811_.st M Epicea.package/EpLog.class/class/instance creation/freshFromFile_.st M Epicea.package/EpLog.class/class/instance creation/fromFile_.st M Epicea.package/EpLog.class/instance/accessing/addEntryWith_tags_.st M Epicea.package/EpLog.class/instance/accessing/head.st M Epicea.package/EpLog.class/instance/accessing/headReference.st R Epicea.package/EpLog.class/instance/accessing/headReference_.st M 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Ombu.package/OmFileStore.class/class/accessing/defaultWritingDeferDuration.st R Ombu.package/OmFileStore.class/class/instance creation/freshFromFile_.st A Ombu.package/OmFileStore.class/class/testing/existsStoreNamed_inDirectory_.st M Ombu.package/OmFileStore.class/definition.st M Ombu.package/OmFileStore.class/instance/accessing/entriesCount.st A Ombu.package/OmFileStore.class/instance/accessing/entryBufferDo_.st M Ombu.package/OmFileStore.class/instance/accessing/entryFor_ifPresent_ifAbsent_.st A Ombu.package/OmFileStore.class/instance/accessing/firstEntryIfAbsent_.st M Ombu.package/OmFileStore.class/instance/accessing/headReference.st A Ombu.package/OmFileStore.class/instance/accessing/lowLevelFileStoreIfNone_.st A Ombu.package/OmFileStore.class/instance/accessing/readEntryForLocalName_ifPresent_ifAbsent_.st A Ombu.package/OmFileStore.class/instance/accessing/writingDeferDuration.st A Ombu.package/OmFileStore.class/instance/accessing/writingDeferDuration_.st A Ombu.package/OmFileStore.class/instance/accessing/writingDeferrer.st R Ombu.package/OmFileStore.class/instance/enumerating/entriesAndPositionsDo_.st M Ombu.package/OmFileStore.class/instance/enumerating/entriesDo_.st R Ombu.package/OmFileStore.class/instance/enumerating/firstEntryIfAbsent_.st R Ombu.package/OmFileStore.class/instance/enumerating/readEntriesWith_.st A Ombu.package/OmFileStore.class/instance/initialization/initialize.st A Ombu.package/OmFileStore.class/instance/initialization/initializeWithGlobalName_fileReference_.st R Ombu.package/OmFileStore.class/instance/initialize-release/ensureInitializedForWriting.st R Ombu.package/OmFileStore.class/instance/initialize-release/initialize.st R Ombu.package/OmFileStore.class/instance/initialize-release/initializeWithGlobalName_fileReference_.st R Ombu.package/OmFileStore.class/instance/printing/descriptionString.st A Ombu.package/OmFileStore.class/instance/private/checkIfMustRefresh.st A Ombu.package/OmFileStore.class/instance/private/critical_.st A Ombu.package/OmFileStore.class/instance/private/entryBuffer.st A Ombu.package/OmFileStore.class/instance/private/entryByLocalName.st A Ombu.package/OmFileStore.class/instance/private/entryPositionsByLocalName.st R Ombu.package/OmFileStore.class/instance/private/error_reading_position_.st A Ombu.package/OmFileStore.class/instance/private/flushEntryBuffer.st M Ombu.package/OmFileStore.class/instance/private/nextEntryFromPosition_.st A Ombu.package/OmFileStore.class/instance/private/readEntriesWith_.st R Ombu.package/OmFileStore.class/instance/private/readingError_on_position_.st R Ombu.package/OmFileStore.class/instance/private/writeEntry_ifSuccess_.st R Ombu.package/OmFileStore.class/instance/private/writingError_.st A Ombu.package/OmFileStore.class/instance/refreshing/flush.st A Ombu.package/OmFileStore.class/instance/refreshing/referenceToLocalName_.st M Ombu.package/OmFileStore.class/instance/refreshing/refresh.st R Ombu.package/OmFileStore.class/instance/testing/isOutdated.st M Ombu.package/OmFileStore.class/instance/writing/newEntry_.st M Ombu.package/OmNullStore.class/instance/writing/newEntry_.st A Ombu.package/OmSTONEntryReader.class/instance/reading/entryPositionsOn_do_.st R Ombu.package/OmSTONEntryReader.class/instance/reading/moveStreamToNextEntry_.st M Ombu.package/OmSequentialSuffixStrategy.class/instance/accessing/nextTo_in_.st M Ombu.package/OmSessionStore.class/class/initialization/initialize.st R Ombu.package/OmSessionStore.class/class/initialization/startUp.st A Ombu.package/OmSessionStore.class/class/system startup/shutDown_.st A Ombu.package/OmSessionStore.class/class/system startup/startUp.st M Ombu.package/OmSessionStore.class/definition.st M Ombu.package/OmSessionStore.class/instance/accessing/globalName.st M Ombu.package/OmSessionStore.class/instance/accessing/headReference.st A Ombu.package/OmSessionStore.class/instance/accessing/lowLevelFileStoreIfNone_.st R Ombu.package/OmSessionStore.class/instance/accessing/maximumNumberOfEntries.st M Ombu.package/OmSessionStore.class/instance/accessing/resetWithStoreNamed_.st M Ombu.package/OmSessionStore.class/instance/accessing/storeNameStrategy.st A Ombu.package/OmSessionStore.class/instance/accessing/storeNameStrategy_.st A Ombu.package/OmSessionStore.class/instance/accessing/writingDeferDuration.st A Ombu.package/OmSessionStore.class/instance/accessing/writingDeferDuration_.st M Ombu.package/OmSessionStore.class/instance/initialization/initializeWithBaseLocator_.st R Ombu.package/OmSessionStore.class/instance/printing/descriptionString.st A Ombu.package/OmSessionStore.class/instance/refreshing/flush.st A Ombu.package/OmSessionStore.class/instance/testing/existsStoreNamed_.st R Ombu.package/OmSessionStore.class/instance/testing/isAvailableStoreName_.st R Ombu.package/OmSessionStore.class/instance/testing/isOutdated.st M Ombu.package/OmSessionStore.class/instance/writing/newEntry_.st A Ombu.package/OmStore.class/instance/accessing/lowLevelFileStoreIfNone_.st R Ombu.package/OmStore.class/instance/printing/descriptionString.st A Ombu.package/OmStore.class/instance/refreshing/flush.st R Ombu.package/OmStore.class/instance/testing/isOutdated.st A Ombu.package/OmStoreFactory.class/README.md A Ombu.package/OmStoreFactory.class/class/accessing/current.st A Ombu.package/OmStoreFactory.class/class/accessing/reset.st A Ombu.package/OmStoreFactory.class/class/accessing/startUp_.st A Ombu.package/OmStoreFactory.class/class/initialization/initialize.st A Ombu.package/OmStoreFactory.class/definition.st A Ombu.package/OmStoreFactory.class/instance/accessing/defaultDirectory.st A Ombu.package/OmStoreFactory.class/instance/accessing/fromFile_.st A Ombu.package/OmStoreFactory.class/instance/accessing/named_.st A Ombu.package/OmStoreFactory.class/instance/accessing/named_inDirectory_.st A Ombu.package/OmStoreFactory.class/instance/accessing/null.st A Ombu.package/OmStoreFactory.class/instance/initialization/initialize.st A Ombu.package/OmStoreFactory.class/instance/private/newStoreNamed_in_.st A Ombu.package/extension/WeakValueDictionary/instance/at_ifPresent_ifAbsentOrNil_.st A Ombu.package/extension/ZnBufferedWriteStream/instance/cr.st A Ombu.package/extension/ZnBufferedWriteStream/instance/position.st A OmbuTests.package/OmDeferrerTest.class/README.md A OmbuTests.package/OmDeferrerTest.class/definition.st A OmbuTests.package/OmDeferrerTest.class/instance/accessing/count.st A OmbuTests.package/OmDeferrerTest.class/instance/accessing/count_.st A OmbuTests.package/OmDeferrerTest.class/instance/accessing/increase.st A OmbuTests.package/OmDeferrerTest.class/instance/tests/testExecuteOnceAfterScheduling.st A OmbuTests.package/OmDeferrerTest.class/instance/tests/testExecuteOnceAfterSchedulingMultipleTimes.st A OmbuTests.package/OmDeferrerTest.class/instance/tests/testExecuteWithoutDelay.st M OmbuTests.package/OmDirectoryStoreTest.class/instance/resources/auxiliaryStoreNamed_in_.st R OmbuTests.package/OmFileStoreTest.class/instance/tests/testIsOutdated.st M OmbuTests.package/OmFileStoreTest.class/instance/tests/testLoadFromCorruptFile4.st M OmbuTests.package/OmFileStoreTest.class/instance/tests/testLoadFromFile.st A OmbuTests.package/OmRandomSuffixStrategyTest.class/instance/tests/testIsNotConstant.st R OmbuTests.package/OmSessionStoreTest.class/instance/tests/testAnnouncement.st A OmbuTests.package/OmSessionStoreTest.class/instance/tests/testResetWithNextStoreNameWithRandomSuffix.st A OmbuTests.package/OmSessionStoreTest.class/instance/tests/testResetWithNextStoreNameWithSequentialSuffix.st A OmbuTests.package/OmSessionStoreTest.class/instance/tests/testResetWithNextStoreNameWithTimeStampSuffix.st A OmbuTests.package/OmSessionStoreTest.class/instance/tests/testResetWithStoreNamedDoesAnnounce.st A OmbuTests.package/OmSessionStoreTest.class/instance/tests/testResetWithStoreNamedSignalsErrorIfFileAlreadyExists.st A OmbuTests.package/OmStoreFactoryTest.class/README.md A OmbuTests.package/OmStoreFactoryTest.class/definition.st A OmbuTests.package/OmStoreFactoryTest.class/instance/tests/testNullStore.st A OmbuTests.package/OmStoreFactoryTest.class/instance/tests/testStoreNamed.st A OmbuTests.package/OmStoreTest.class/instance/running/beforeAndAfterFlushStore_.st M OmbuTests.package/OmStoreTest.class/instance/tests/testEntriesCount.st M OmbuTests.package/OmStoreTest.class/instance/tests/testEntriesDo.st M OmbuTests.package/OmStoreTest.class/instance/tests/testEntryForAbsentEntry.st M OmbuTests.package/OmStoreTest.class/instance/tests/testEntryForPresentEntry.st M OmbuTests.package/OmStoreTest.class/instance/tests/testFirstEntryIfAbsent.st M OmbuTests.package/OmStoreTest.class/instance/tests/testHeadReference.st M OmbuTests.package/OmStoreTest.class/instance/tests/testMultipleEntries.st M OmbuTests.package/OmStoreTest.class/instance/tests/testNewEntry.st M OmbuTests.package/OmStoreTest.class/instance/tests/testReferenceTo.st M OmbuTests.package/OmStoreTest.class/instance/tests/testWritingFileReference.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60384.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60385.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60384.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60385.st M ScriptLoader60.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 60385 19670 The tree widget for FastTable jumps to the selected element when expanding or collapsing a node https://pharo.fogbugz.com/f/cases/19670 19630 Epicea Lost Changes Detector: MNU OmNullReference>>globalName https://pharo.fogbugz.com/f/cases/19630 19674 Remove UUIDGenerator and rename NeoUUIDGenerator to UUIDGenerator https://pharo.fogbugz.com/f/cases/19674 19681 #signalerContext should use #method, not #methodNode https://pharo.fogbugz.com/f/cases/19681 http://files.pharo.org/image/60/60385.zip

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[ANN] Prototype Fund for Free Software developers
by Hilaire Feb. 10, 2017

Feb. 10, 2017

Hi, This support fund targets civil society oriented free software for Germany based developers. https://prototypefund.de/en/ Hilaire -- Dr. Geo http://drgeo.eu

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Integer arithmetic and bit counting performance in Squeak and Pharo
by Benoit St-Jean Feb. 10, 2017

Feb. 10, 2017

For those interested in performance of bit operations and integer arithmetic in Squeak and Pharo : Bit operations in general : https://endormitoire.wordpress.com/2017/02/10/bits-and-pieces/ Bit counting algorithms : https://endormitoire.wordpress.com/2017/02/10/1001001-sos/ Some questions, some results, some answers...Â ----------------- BenoÃ®t 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".Â (A. Einstein)

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Final rush for submitting GSOC proposal - Need your help
by Serge Stinckwich Feb. 9, 2017

Feb. 9, 2017

Hi all, we are currently working with Alexandre to submit the gsoc proposal to Google. I was a little bit busy with my lectures and I didn't check the current proposals available here: http://gsoc.pharo.org/ but all the projects are coming from RMOD team, but having all the projects proposal coming from the same place might be perceived negatively from Google. Can we add more projects from previous gsoc form other people also ? We have only one hour to polish the list. Thank you for your help. -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

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