Question

更新：

似乎只有我的Event_Creator项目才有这个问题。我的所有其他项目都可以编译并成功运行。

更新2：

当我想构建我的项目时，我只能选择“默认”构建，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吗？

我遇到了eclipse luna的问题，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”的错误。内部错误构建项目Event_Creator配置默认显示java.lang.NullPointerException 内部错误构建项目Event_Creator配置默认显示java.lang.NullPointerException

Event_Creator是我的节目。

我不知道究竟是什么导致了这个问题，我已经在这个程序上编程了大约两个星期而且我已经能够编译好了，但是今天这件事发生了。

我尝试了很多东西，甚至删除了eclipse然后重新下载它。我也尝试创建新的工作区来查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，所以我不知道我没有使用一些可能让我感到困惑的奇怪的java工作区。

我正在使用minGw编译器和此CDT存储库：

http://download.eclipse.org/tools/cdt/releases/8.6/

提醒一下，我已经能够编译好两周了，这就是今天我刚开始计算机并打开日食的时候。

在Eclipse \ Workspaces.metadata中的.log文件中，我发现这些条目与nullpointer错误有关，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)

Answer 1

好的，因为我注意到Event_Creator项目只有“默认”构建选项，而我的其他项目（我可以构建）有“debug”和“release”选项，我只是创建了一个新的空项目并手动移动了我的文件进入那个项目，然后我打开了eclipse，刷新了我的新项目，并且我可以构建它。

我假设旧目录中的项目文件发生了一些损坏我的构建的事情。

C ++ Eclipse Luna CDT - java.lang.NullPointerException

1 个答案: