- Pharo-dev - lists.pharo.org

image livelock
by Robert Withers Oct. 16, 2015

Oct. 16, 2015

I've noticed my image livelocks occassionally, when running tests from a category and other times as well. So when I am in my system, which is crazy with asynchronous evaluation, and I livelock, I wonder: is this due to Pharo locking as I have seen or is there an issue in my code? Has there been previous reports of livelock? Any clues where the issue may reside? thanks ^^ Robert

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ConfigurationOf versions with development blessing
by Juraj Kubelka Oct. 15, 2015

Oct. 15, 2015

Hi! Andrei and I have had an issue loading our configuration using the following script: Gofer it smalltalkhubUser: 'Moose' project: 'GToolkit'; configurationOf: 'GTSpotter'; loadDevelopment. It was loading an old version, instead of expected one. Moreover, the following script worked: Gofer new smalltalkhubUser: 'Moose' project: 'GToolkit'; package: 'ConfigurationOfGTSpotter'; load. (ConfigurationOfGTSpotter project version: #'development') load. Then, we have found out that one version has blessing set to development: version102: spec <version: '1.0.2' imports: #('1.0-baseline' )> spec for: #'common' do: [ spec blessing: #'developmentâ. but it was incorrect. There is about 105 versions with development blessing (Moose 6.0 image). You can check it out using: ((SystemNavigation default allSendersOf: #blessing:) select: [ :each | (each selector beginsWith: 'version') and: [ each methodClass name beginsWith: 'ConfigurationOf' ] ] ) select: [ :each | each sourceCode includesSubstring: 'blessing: #''development''.' ]. If project distinguish between bleeding edge version and development version, it is correct. But if not, it could be a problem (like in our case of Spotter). So I suggest you to check your project and fix it if appropriate. There is list of projects that define version with development blessing: ConfigurationOfOSWindow ConfigurationOfMagritte3 ConfigurationOfVersionner ConfigurationOfMoose ConfigurationOfZincHTTPComponents ConfigurationOfGrease ConfigurationOfPetitParser ConfigurationOfMerlin ConfigurationOfPastell ConfigurationOfMooseAlgos ConfigurationOfRubric ConfigurationOfCommandShell ConfigurationOfTxText It may save your or other developers' time :-) Cheers, Juraj

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One more question about the transformation rules
by Yuriy Tymchuk Oct. 15, 2015

Oct. 15, 2015

Hi, when a transformation rule checks a method, except for only checking whether it matches the rule, it also checks if self class recursiveSelfRule executeTree: rewriteRule tree initialAnswer: false evaluates to false. #recursiveSelfRule is '`@methodName: `@args | `@temps | self `@methodName: `@args1' '`@methodName: `@args | `@temps | ^ self `@methodName: `@args1â Do I understand correctly that before signaling that method is bad the rule makes sure that the transformation will not create a recursion? Uko

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[pharo-project/pharo-core]
by GitHub Oct. 15, 2015

Oct. 15, 2015

Branch: refs/tags/50386 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] c64067: 50386
by GitHub Oct. 15, 2015

Oct. 15, 2015

Branch: refs/heads/5.0 Home: https://github.com/pharo-project/pharo-core Commit: c640677ad5f963c154e0a9a83f67ab52253c4c64 https://github.com/pharo-project/pharo-core/commit/c640677ad5f963c154e0a9a8… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2015-10-15 (Thu, 15 Oct 2015) Changed paths: M Kernel.package/PharoKernelAssembly.class/class/meta-data/parts.st M Manifest-Core.package/SmalllintManifestChecker.class/instance/accessing/criticsOf_.st M Manifest-Core.package/SmalllintManifestChecker.class/instance/actions/runRules_onPackage_withoutTestCase_.st M Manifest-Core.package/TheManifestBuilder.class/instance/manifest/isFalsePositive_onRule_version_.st A Manifest-Core.package/extension/RBPackageEnvironment/instance/smallLintCritics.st A Manifest-Core.package/extension/RPackage/instance/criticNameOn_.st M Morphic-Widgets-Windows.package/SystemWindow.class/definition.st M Morphic-Widgets-Windows.package/SystemWindow.class/instance/announcement/announce_.st R Morphic-Widgets-Windows.package/SystemWindow.class/instance/announcement/announcer.st M Refactoring-Critics.package/PharoCriticRules.class/class/default rules/pharoHardLintRules.st A Refactoring-Critics.package/RBArchitectureLintRule.class/README.md A Refactoring-Critics.package/RBArchitectureLintRule.class/class/accessing/uniqueIdentifierName.st A Refactoring-Critics.package/RBArchitectureLintRule.class/class/testing/isVisible.st A Refactoring-Critics.package/RBArchitectureLintRule.class/definition.st A Refactoring-Critics.package/RBArchitectureLintRule.class/instance/accessing/group.st A Refactoring-Critics.package/RBArchitectureLintRule.class/instance/accessing/resultClass.st A Refactoring-Critics.package/RBArchitectureLintRule.class/instance/testing/isArchitecturalRule.st A Refactoring-Critics.package/RBCompositeLintRule.class/instance/running/checkPackage_.st A Refactoring-Critics.package/RBLintRule.class/instance/running/checkPackage_.st A Refactoring-Critics.package/RBLintRule.class/instance/testing/isArchitecturalRule.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/README.md A Refactoring-Critics.package/RBPharoBootstrapRule.class/class/accessing/uniqueIdentifierName.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/definition.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/accessing/bootstrapPackages.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/accessing/collectionsPackages.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/accessing/name.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/checking/assertNoNewExternalDependency.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/checking/checkPackage_.st A Refactoring-Critics.package/RBPharoBootstrapRule.class/instance/private/dependencyChecker.st M Refactoring-Critics.package/RBSmalllintChecker.class/instance/actions/run.st A Refactoring-Critics.package/RBSmalllintChecker.class/instance/private/checkPackage_.st M Refactoring-Critics.package/RBUnaryAccessingMethodWithoutReturnRule.class/instance/running/basicCheck_.st M Refactoring-Environment.package/RBBrowserEnvironment.class/instance/environments/withoutClasses_.st A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNewDependency.class/README.md A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNewDependency.class/definition.st A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNewDependency.class/instance/accessing/dependenciesOf_.st A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNoNewDependency.class/README.md A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNoNewDependency.class/definition.st A Refactoring-Tests-Critics.package/RBPharoBootstrapAnalyzerStubWithNoNewDependency.class/instance/accessing/dependenciesOf_.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/README.md A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/definition.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/instance/running/setUp.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/instance/running/tearDown.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/instance/tests/testRuleDoesNotFailIfAppliedOnNonBootstrapPackage.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/instance/tests/testRuleDoesNotFailIfNoNewExternalDependency.st A Refactoring-Tests-Critics.package/RBPharoBootstrapRuleTest.class/instance/tests/testRuleFailsIfAnyNewExternalDependencyFound.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50385.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50386.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50385.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50386.st M ScriptLoader50.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st A Tool-Base.package/extension/RPackage/instance/browse.st M Tool-CriticBrowser.package/CriticBrowser.class/instance/menu/menu_shifted_.st M Tool-CriticBrowser.package/CriticBrowser.class/instance/private/applyRules.st M Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/addAllItems.st M Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/addItems.st M Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/removeAllItems.st M Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/removeItems.st M Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/sort_.st A Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/sort_withAll_.st A Tool-CriticBrowser.package/SelectPackageBrowser.class/instance/private/sort_withoutAll_.st M Tool-CriticBrowser.package/SelectRuleBrowser.class/class/instance creation/openWithEnvironment_removeTestCase_.st M Tool-CriticBrowser.package/SelectRuleBrowser.class/instance/api/removeItems.st M Tool-CriticBrowser.package/SingleCodeCriticResultList.class/instance/initialization/whenSelectedItemChangesOnListModel.st M Tool-CriticBrowser.package/SingleCodeCriticResultList.class/instance/menu/addNavigationMenuItemsTo_.st M Tool-CriticBrowser.package/SingleCodeCriticResultList.class/instance/menu/browseCritic.st A Tool-CriticBrowser.package/SingleCodeCriticResultList.class/instance/menu/browseDependencies.st M Tool-CriticBrowser.package/SingleCodeCriticResultList.class/instance/menu/menu_shifted_.st Log Message: ----------- 50386 16789 RBUnaryAccessingMethodWithoutReturnRule refers to #nodes instead of #statements https://pharo.fogbugz.com/f/cases/16789 16758 Unify SystemWindow announcing with Morph announcing https://pharo.fogbugz.com/f/cases/16758 16653 Add an architectural rule for the bootstrap layer https://pharo.fogbugz.com/f/cases/16653 http://files.pharo.org/image/50/50386.zip

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[ANN] Pharo Consortium New Gold Member: Lifeware
by Marcus Denker Oct. 15, 2015

Oct. 15, 2015

The Pharo Consortium is very happy to announce that Lifeware has joined the Consortium as an Gold Member. About - Lifeware: http://www.lifeware.ch - Pharo Consortium: http://consortium.pharo.org The goal of the Pharo Consortium is to allow companies and institutions to support the ongoing development and future of Pharo. Individuals can support Pharo via the Pharo Association: http://association.pharo.org

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Autonomous Shark-Monitoring Drone
by Eliot Miranda Oct. 15, 2015

Oct. 15, 2015

Dear Friends and Colleagues, as you may know, Sharks, as apex predators, are vital to maintaining healthy marine ecosystems, and at the same time, their populations are plummeting due to human actions. It is estimated for example that the population of pelagic oceanic white tip sharks is reducing by 17% per year [1] and I've heard (can't find a reference) that populations in the eastern indian/western pacific are at 1% of normal levels. Such reductions in populations create "trophic cascades" that produce wide-ranging changes in populations of different species all the way down the food chain [2]. And the marine ecosystem is a key source of human nutrition; it comprises between 13% and 17% of global human protein intake [3]. As you may also know, there is currently a shark attack crisis in New South Wales [4]. While most people in the region oppose killing sharks in response to the crisis, existing solutions, netting and culling reduce those same threatened populations of sharks upon which the sustainability of marine food supply d ecosystems depend [5], and are arguably ineffective [6]. Apparently the most successful approach at avoiding attacks is the use of human spotters, as used in Cape Town, where people in tall towers scan the sea close to shore [6]. But please watch this Youtube video <https://www.youtube.com/watch?v=q2U3gjwJfS4> [7] from Pismo Beach, California. The shark is spotted at about 1:20 into the video. This drone, a phantom 3, is sending live video back to the operators, who are using remote control. What we can see from this video is that the point of view of drones is far superior to that of spotters. My first thought is that autonomous drones could provide a cheap and scalable solution to patrolling beaches to prevent shark attacks. I expect that processors like the Pi 2 have easily enough processing power to both plan and execute search patterns along beaches, and perform the image recognition necessary to reliably detect potentially dangerous sharks. A drone might also be able autonomously to visit surfers and swimmers near to the shark and warn them, either by some signal such as flashing red LEDs or an audible message (language issues notwithstanding). The drone would have to be able to identify swimmers and surfers in the water (not easy; sharks confuse seals and surfers all the time), but computing an optimal route to visit suspected swimmers should be relatively easy :-). I imagine that sooner or later it will be possible to construct cheap rugged solar powered docking/charging shelters that drones could depart from and return to, to charge and shelter from the elements after patrols. Satellite communications could provide status reports for maintenance. My second thought is that as a community, we probably have all the necessary expertise to construct a working prototype that at least demonstrates feasibility. Such a prototype would have to be able to fly above the ocean along a beach under its own control for a useful period of time, at least 15 minutes, and demonstrate that it can identify a shark in the water (we could use a rubber shark <https://www.youtube.com/watch?v=9dghbyBaQyI> for testing ;-) ). Our community includes people doing image recognition with the Pi, radio control experts, users of 3D printers, and some exceptional programmers. If a small, strong group could be formed with the relevant expertise we may be able to develop a prototype in a short enough time frame to be relevant. Of course, availability of time is a big issue. I couldn't contribute more than a few hours a week. But nothing ventured, nothing gained. So I'm writing this message to the Squeak and Pharo communities, and bcc'ing a few friends I know that have relevant expertise to ask for two things; first, for good information on scoping out the project, possible technologies, power budgets, costs, what is available off-the-shelf (both in hardware and known algorithms) and what we would need to construct ourselves, and second, for volunteers. Who among us are really excited by this project, have relevant expertise and are motivated to make a contribution? [1] www.sharkadvocates.org/cites_4sharks_owt_fact_sheet.pdf [2] http://www.globalshark.ca/pressmaterial/cascading/fig1_web.pdf [3] http://www.who.int/nutrition/topics/3_foodconsumption/en/index5.html [4] http://www.bbc.com/news/world-australia-34398516 [5] http://www.theguardian.com/environment/2015/sep/29/shark-hit-australian-com… [6] http://www.nonswsharkcull.net/latestnews/tag/shark_spotting/ [7] https://www.youtube.com/watch?v=q2U3gjwJfS4 crazier ideas: Infra red cameras are becoming cheap and easily available. Species like Great White and Bull Shark have elevated metabolisms, effectively they are warm blooded, so these two facts may allow spotting at night. Sharks are extremely sensitive to electrical fields; maybe some kind of transmitter could be fitted to a drone, e.g. via a wire suspended in the water, that could generate a field that could direct the shark away from swimmers _,,,^..^,,,_ best, Eliot

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[pharo-project/pharo-core]
by GitHub Oct. 15, 2015

Oct. 15, 2015

Branch: refs/tags/50385 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] 4b94be: 50385
by GitHub Oct. 15, 2015

Oct. 15, 2015

Branch: refs/heads/5.0 Home: https://github.com/pharo-project/pharo-core Commit: 4b94be1f472909b6628f145ea97f8ff0148efe3f https://github.com/pharo-project/pharo-core/commit/4b94be1f472909b6628f145e… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2015-10-15 (Thu, 15 Oct 2015) Changed paths: M Nautilus.package/AbstractNautilusUI.class/instance/accessing/model_.st M Nautilus.package/AbstractNautilusUI.class/instance/announcement registration/registerToAnnouncements.st R Nautilus.package/AbstractNautilusUI.class/instance/announcement registration/registerToMCAnnouncements.st M Nautilus.package/AbstractNautilusUI.class/instance/announcement registration/registerToSystemAnnouncements.st M Nautilus.package/AbstractNautilusUI.class/instance/announcement registration/registerToTestAnnouncements.st A Nautilus.package/AbstractNautilusUI.class/instance/announcement registration/unregisterToAnnouncements.st A Nautilus.package/AbstractNautilusUI.class/instance/announcement 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Refactoring-Critics.package/RBVariableReferencedOnceRule.class/class/testing/checksClass.st A Refactoring-Critics.package/RBVariableReferencedOnceRule.class/instance/running/basicCheck_.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50384.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50385.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50384.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50385.st M ScriptLoader50.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 50385 16770 Create a basic version of checking methods in LintRules https://pharo.fogbugz.com/f/cases/16770 16785 Replace the usages of #smalltalkCode in OpalTools https://pharo.fogbugz.com/f/cases/16785 16525 Nautilus leaking SystemAnnouncements https://pharo.fogbugz.com/f/cases/16525 http://files.pharo.org/image/50/50385.zip

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TestPGConnection>>testNotify2 fails
by Esteban A. Maringolo Oct. 14, 2015

Oct. 14, 2015

I have a failing test in my computer when running the test mentioned in the subject, I get the following error: "PGConnection has a defective state machine" Stack: PGConnection(Object)>>error: PGConnection(PGActiveObject)>>stCantHappen: PGConnection>>stCantHappen: PGConnection(PGActiveObject)>>processEvent: PGConnection(PGActiveObject)>>generateEvent:to: PGConnection(PGActiveObject)>>saProcessEventsUntil: PGConnection>>copy:withStream: TestPGConnection>>testNotify2 I tested in my computer with Pharo4, Pharo3 and Pharo2, and I get the same error in all the images with the latest version of it, and also with the oldest I could load (in Pharo 2, Name: PostgresV2-Maiano.24). My PostgreSQL server version is 9.3.7. Does it fail for you too? Regards! Esteban.

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