Exception when adding nature

[vodorok]

The issue could be from trying to add the nature a second time. Needs investigation. Surfaced during integration testing.

!ENTRY org.eclipse.core.resources 4 2 2019-05-23 19:14:05.831
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.IllegalArgumentException: Multiple entries with same key: CLUTTER_IM_MODULE=xim/bin/bash: python_path/bin/activate: No such file or directory and CLUTTER_IM_MODULE=xim
at com.google.common.collect.ImmutableMap.conflictException(ImmutableMap.java:215)
at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:209)
at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket(RegularImmutableMap.java:147)
at com.google.common.collect.RegularImmutableMap.fromEntryArray(RegularImmutableMap.java:110)
at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:393)
at org.codechecker.eclipse.plugin.runtime.EnvironmentParser.parse(EnvironmentParser.java:20)
at org.codechecker.eclipse.plugin.runtime.CodeCheckEnvironmentChecker.getInitialEnvironment(CodeCheckEnvironmentChecker.java:129)
at org.codechecker.eclipse.plugin.runtime.CodeCheckEnvironmentChecker.(CodeCheckEnvironmentChecker.java:62)
at org.codechecker.eclipse.plugin.config.CcConfiguration.modifyProjectEnvironmentVariables(CcConfiguration.java:270)
at org.codechecker.eclipse.plugin.CodeCheckerNature.configure(CodeCheckerNature.java:23)
at org.eclipse.core.internal.resources.NatureManager$1.run(NatureManager.java:147)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.resources.NatureManager.configureNature(NatureManager.java:163)
at org.eclipse.core.internal.resources.NatureManager.configureNatures(NatureManager.java:209)
at org.eclipse.core.internal.resources.Project.basicSetDescription(Project.java:102)
at org.eclipse.core.internal.resources.Project.setDescription(Project.java:1268)
at org.eclipse.core.internal.resources.Project.setDescription(Project.java:1295)
at org.codechecker.eclipse.plugin.command.AddProjectNature.execute(AddProjectNature.java:57)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:291)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:239)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:431)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:446)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:472)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5252)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1348)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1374)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1357)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1142)
at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot$2.run(AbstractSWTBot.java:174)
at org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable$5.doRun(UIThreadRunnable.java:222)
at org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.run(UIThreadRunnable.java:76)
at org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.asyncExec(UIThreadRunnable.java:224)
at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.asyncExec(AbstractSWTBot.java:640)
at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:162)
at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:142)
at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:132)
at org.eclipse.swtbot.swt.finder.widgets.SWTBotMenu$1.run(SWTBotMenu.java:88)
at org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable$5.doRun(UIThreadRunnable.java:222)
at org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable$1.run(UIThreadRunnable.java:88)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4497)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4110)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1044)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
at org.eclipse.swtbot.eclipse.core.UITestApplication.start(UITestApplication.java:58)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

!ENTRY org.codechecker.eclipse.plugin 4 0 2019-05-23 19:14:05.839
!MESSAGE AddProjectNature.java:63 execute(): org.eclipse.core.runtime.CoreException: Problems encountered while setting project description.