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java.lang.NullPointerException: 	at org.eclipse.cdt.utils.envvar.EnvVarOperationProcessor.convertToList(EnvVarOperationProcessor.java:158)	at org.eclipse.cdt.managedbuilder.internal.envvar.EnvironmentVariableProvider$DefaultBuildPathResolver.resolveBuildPaths(EnvironmentVariableProvider.java:72)	at org.eclipse.cdt.managedbuilder.internal.envvar.EnvironmentVariableProvider.getBuildPaths(EnvironmentVariableProvider.java:219)	at org.eclipse.cdt.managedbuilder.internal.dataprovider.BuildEntryStorage.getEnvEntries(BuildEntryStorage.java:374)	at org.eclipse.cdt.managedbuilder.internal.dataprovider.BuildEntryStorage.putEntriesToLevel(BuildEntryStorage.java:186)	at org.eclipse.cdt.core.settings.model.util.AbstractEntryStorage.initCache(AbstractEntryStorage.java:71)	at org.eclipse.cdt.core.settings.model.util.AbstractEntryStorage.getEntries(AbstractEntryStorage.java:34)	at org.eclipse.cdt.managedbuilder.internal.dataprovider.BuildLanguageData.getEntries(BuildLanguageData.java:161)	at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultLanguageData.getEntriesToCopy(CDefaultLanguageData.java:101)	at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultLanguageData.createStore(CDefaultLanguageData.java:92)	at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultLanguageData.copySettingsFrom(CDefaultLanguageData.java:85)	at org.eclipse.cdt.internal.core.settings.model.CLanguageSettingCache.copySettingsFrom(CLanguageSettingCache.java:47)	at org.eclipse.cdt.internal.core.settings.model.CLanguageSettingCache.(CLanguageSettingCache.java:36)	at org.eclipse.cdt.internal.core.settings.model.CFolderDescriptionCache.copyLanguageData(CFolderDescriptionCache.java:79)	at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultFolderData.copyDataFrom(CDefaultFolderData.java:56)	at org.eclipse.cdt.internal.core.settings.model.CFolderDescriptionCache.(CFolderDescriptionCache.java:38)	at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.copyFolderData(CConfigurationDescriptionCache.java:235)	at org.eclipse.cdt.core.settings.model.extension.impl.CDefaultConfigurationData.copySettingsFrom(CDefaultConfigurationData.java:113)	at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.applyData(CConfigurationDescriptionCache.java:193)	at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.applyDatas(CProjectDescription.java:216)	at org.eclipse.cdt.internal.core.settings.model.SetCProjectDescriptionOperation.executeOperation(SetCProjectDescriptionOperation.java:98)	at org.eclipse.cdt.internal.core.model.CModelOperation.execute(CModelOperation.java:341)	at org.eclipse.cdt.internal.core.model.CModelOperation.run(CModelOperation.java:607)	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)	at org.eclipse.cdt.internal.core.model.CModelOperation.runOperation(CModelOperation.java:638)	at org.eclipse.cdt.internal.core.settings.model.AbstractCProjectDescriptionStorage.setProjectDescription(AbstractCProjectDescriptionStorage.java:203)	at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionStorageManager.setProjectDescription(CProjectDescriptionStorageManager.java:149)	at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.setProjectDescription(CProjectDescriptionManager.java:885)	at org.eclipse.cdt.managedbuilder.internal.core.BuildSettingsUtil.checkApplyDescription(BuildSettingsUtil.java:211)	at org.eclipse.cdt.managedbuilder.core.ManagedBuildManager.updateCoreSettings(ManagedBuildManager.java:1574)	at org.eclipse.cdt.build.internal.core.scannerconfig.CfgDiscoveredPathManager$1.run(CfgDiscoveredPathManager.java:154)	at org.eclipse.cdt.internal.core.model.BatchOperation.executeOperation(BatchOperation.java:36)	at org.eclipse.cdt.internal.core.model.CModelOperation.execute(CModelOperation.java:341)	at org.eclipse.cdt.internal.core.model.CModelOperation.run(CModelOperation.java:607)	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)	at org.eclipse.cdt.core.model.CoreModel.run(CoreModel.java:1220)	at org.eclipse.cdt.core.model.CoreModel.run(CoreModel.java:1181)	at org.eclipse.cdt.build.internal.core.scannerconfig.CfgDiscoveredPathManager.updateCoreSettings(CfgDiscoveredPathManager.java:157)	at org.eclipse.cdt.build.core.scannerconfig.ScannerConfigBuilder.build(ScannerConfigBuilder.java:125)	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:205)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:245)	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:300)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:303)	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:359)	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:382)	at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:486)	at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)	at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:287)	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)