最新又开始读起来Spring的源码，突然报了一个错了！
exception during working with external system: java.lang.AssertionError
exception during working with external system: java.lang.AssertionError
at org.jetbrains.plugins.gradle.service.project.BaseGradleProjectResolverExtension.createModule(BaseGradleProjectResolverExtension.java:154)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.kotlin.idea.configuration.KotlinMPPGradleProjectResolver.createModule(KotlinMPPGradleProjectResolver.kt:67)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.createModule(AbstractProjectResolverExtension.java:86)
at org.jetbrains.plugins.gradle.service.project.TracedProjectResolverExtension.createModule(TracedProjectResolverExtension.java:45)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.doResolveProjectInfo(GradleProjectResolver.java:344)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.access$200(GradleProjectResolver.java:60)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:725)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:708)
at org.jetbrains.plugins.gradle.service.execution.GradleExecutionHelper.execute(GradleExecutionHelper.java:278)
at org.jetbrains.plugins.gradle.service.project.GradleBuildSrcProjectsResolver.handleBuildSrcProject(GradleBuildSrcProjectsResolver.java:185)
at org.jetbrains.plugins.gradle.service.project.GradleBuildSrcProjectsResolver.discoverAndAppendTo(GradleBuildSrcProjectsResolver.java:152)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:131)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:60)
at com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.lambda$resolveProjectInfo$0(RemoteExternalSystemProjectResolverImpl.java:35)
at com.intellij.openapi.externalSystem.service.remote.AbstractRemoteExternalSystemService.execute(AbstractRemoteExternalSystemService.java:57)
at com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.resolveProjectInfo(RemoteExternalSystemProjectResolverImpl.java:35)
at com.intellij.openapi.externalSystem.service.remote.wrapper.ExternalSystemProjectResolverWrapper.resolveProjectInfo(ExternalSystemProjectResolverWrapper.java:44)
at com.intellij.openapi.externalSystem.service.internal.ExternalSystemResolveProjectTask.doExecute(ExternalSystemResolveProjectTask.java:100)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:146)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:132)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.executeImpl(ExternalSystemUtil.java:540)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.lambda$execute$1(ExternalSystemUtil.java:392)
at com.intellij.openapi.project.DumbServiceImpl.suspendIndexingAndRun(DumbServiceImpl.java:150)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:392)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:647)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:888)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:163)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:150)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.lambda$run$0(CoreProgressManager.java:402)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:221)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:402)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:238)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
这个错，应该是版本的问题导致的！！ IDEA 2019 3版本，将gradle的版本换为
