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问题：

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

卞博简
2023-03-14

更新：

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debug和release。所以我想我的项目构建设置出了问题？

我在使用eclipse luna时遇到了一个问题，每当我试图构建项目时，都会出现以下错误：

生成过程中出现错误。在项目“event_creator”上运行生成器“cdt builder”时出错。内部错误生成项目Event_Creator配置默认java.lang.NullPointerException内部错误生成项目Event_Creator配置默认java.lang.NullPointerException

Event_Creator就是我的程序。

我不知道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，我已经能够很好地编译它了，但今天发生了。

我也在使用C/C++工作区，所以我不知道我没有使用一些奇怪的java工作区，可能会影响我。

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/

在\eclipse\workspaces.metadata中的.log文件中，我发现了这些与nullpointer错误相关的条目，尽管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)

共有1个答案

彭俊智
2023-03-14

好的，既然我注意到Event_Creator项目只有“default”构建选项，而我的其他项目（我可以构建的）有“debug”和“release”选项，我就创建了一个新的空项目，并手动将我的文件移到该项目中，然后打开eclipse，刷新我的新项目，然后我就可以构建它了。

我假设旧目录中的一个项目文件发生了什么事情，损坏了我的构建。

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