【发布时间】：2015-07-15 00:45:52
【问题描述】：
更新：
似乎只有我的 Event_Creator 项目有这个问题。我的其他项目都可以编译运行成功。
更新 2：
当我想构建我的项目时，我只能从“默认”构建中选择，通常我应该看到调试和发布。所以我猜我的项目构建设置有问题？
我在使用 eclipse luna 时遇到问题，每当我尝试构建我的项目时，我都会收到此错误：
构建期间发生错误。 在项目“Event_Creator”上运行构建器“CDT Builder”时出错。 内部错误构建项目 Event_Creator 配置 默认 java.lang.NullPointerException 内部错误构建项目 Event_Creator 配置 默认 java.lang.NullPointerException
Event_Creator 就是我的程序。
我真的不知道是什么原因造成的，我已经在这个程序上编程了大约 2 周，我已经能够很好地编译它，但是今天发生了这种情况。
我尝试了很多东西，甚至删除了eclipse然后重新下载了它。我还尝试创建新的工作区，看看我当前的工作区是否有问题，但我仍然遇到同样的问题。
我也在使用 C/C++ 工作区，所以我很确定我没有使用一些可能会惹恼我的奇怪 Java 工作区。
我正在使用 minGw 编译器和这个 CDT 存储库：
http://download.eclipse.org/tools/cdt/releases/8.6/
提醒一下，我已经可以编译两周了，这只是今天我启动计算机并打开eclipse时发生的。
在我的 .log 文件中的 \Eclipse\Workspaces.metadata 中，我发现了这些与空指针错误相关的条目，但我不知道它们的真正含义。
!SESSION 2015-05-05 12:25:46.074 -----------------------------------------------
eclipse.buildId=4.4.2.M20150204-1700
java.version=1.8.0_31
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.epp.package.cpp.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.cpp.product
!ENTRY org.eclipse.egit.ui 2 0 2015-05-05 12:26:24.835
!MESSAGE Warning: EGit couldn't detect the installation path "gitPrefix" of native Git. Hence EGit can't respect system level
Git settings which might be configured in ${gitPrefix}/etc/gitconfig under the native Git installation directory.
The most important of these settings is core.autocrlf. Git for Windows by default sets this parameter to true in
this system level configuration. The Git installation location can be configured on the
Team > Git > Configuration preference page's 'System Settings' tab.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
!ENTRY org.eclipse.egit.ui 2 0 2015-05-05 12:26:24.853
!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
user global configuration and to define the default location to store repositories: 'C:\Users\Gustav'. If this is
not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
EGit might behave differently since they see different configuration options.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
!ENTRY org.eclipse.core.resources 4 2 2015-05-05 12:26:30.095
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 1
org.eclipse.core.runtime.CoreException: Internal error building project Event_Creator configuration Default
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:154)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
... 17 more
!SUBENTRY 1 org.eclipse.cdt.managedbuilder.core 4 0 2015-05-05 12:26:30.098
!MESSAGE Internal error building project Event_Creator configuration Default
!STACK 0
java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!SUBENTRY 1 org.eclipse.cdt.managedbuilder.core 4 0 2015-05-05 12:26:30.098
!MESSAGE Internal error building project Event_Creator configuration Default
!STACK 0
java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!ENTRY org.eclipse.core.resources 4 75 2015-05-05 12:26:30.102
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.cdt.managedbuilder.core 4 75 2015-05-05 12:26:30.102
!MESSAGE Errors running builder 'CDT Builder' on project 'Event_Creator'.
!STACK 1
org.eclipse.core.runtime.CoreException: Internal error building project Event_Creator configuration Default
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:154)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
... 17 more
!SUBENTRY 2 org.eclipse.cdt.managedbuilder.core 4 0 2015-05-05 12:26:30.102
!MESSAGE Internal error building project Event_Creator configuration Default
!STACK 0
java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!SUBENTRY 1 org.eclipse.cdt.managedbuilder.core 4 0 2015-05-05 12:26:30.102
!MESSAGE Internal error building project Event_Creator configuration Default
!STACK 0
java.lang.NullPointerException
at org.eclipse.core.runtime.Path.append(Path.java:261)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.addOutputs(BuildDescription.java:1030)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.calculateOutputs(BuildDescription.java:1141)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.handleMultiSteps(BuildDescription.java:838)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.initDescription(BuildDescription.java:753)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.BuildDescription.init(BuildDescription.java:815)
at org.eclipse.cdt.managedbuilder.internal.buildmodel.DefaultBuildDescriptionFactory.createBuildDescription(DefaultBuildDescriptionFactory.java:45)
at org.eclipse.cdt.managedbuilder.buildmodel.BuildDescriptionManager.createBuildDescription(BuildDescriptionManager.java:107)
at org.eclipse.cdt.managedbuilder.core.InternalBuildRunner.invokeBuild(InternalBuildRunner.java:104)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:753)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:513)
at org.eclipse.cdt.managedbuilder.internal.core.CommonBuilder.build(CommonBuilder.java:459)
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:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:415)
at org.eclipse.ui.actions.BuildAction$1.runInWorkspace(BuildAction.java:305)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
来自 .bak_0.log（如果它也很重要）
!ENTRY org.eclipse.linuxtools.valgrind.ui 4 0 2015-05-05 11:52:25.492
!MESSAGE FrameworkEvent ERROR
!STACK 0
org.osgi.framework.BundleException: Could not resolve module: org.eclipse.linuxtools.valgrind.ui [281]
Unresolved requirement: Import-Package: org.eclipse.cdt.core.dom.ast
at org.eclipse.osgi.container.Module.start(Module.java:434)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1561)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1476)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
【问题讨论】：
-
查看工作区.metadata目录下的.log文件，看看是否有更详细的消息
-
更新了我的问题，使其包含 .log 输出。但我真的不知道其中大部分是什么意思。
-
我刚刚看到，由于某种原因，当我想构建时，我只能选择“默认”，通常我应该看到“调试”和“发布”。不过不知道是什么原因造成的。
标签： c++ eclipse eclipse-cdt eclipse-luna