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[jdt-dev] Gerrit Builds are Failing

Gerrit Builds are failing, e.g.,

https://ci.eclipse.org/jdt/job/eclipse.jdt.core-Gerrit/2556/console
https://ci.eclipse.org/equinox/job/p2-gerrit/2573/console

I assume all Platform Gerrit verification builds will fail this same way.

The stack traces look like this:

10:27:10 [INFO] 
10:27:10 [INFO] --- tycho-eclipserun-plugin:1.6.0-SNAPSHOT:eclipse-run (api-analysis) @ org.eclipse.jdt.core ---
10:27:10 [INFO] Toolchain in tycho-eclipserun-plugin: JDK[/opt/tools/java/oracle/jdk-8/latest/jre]
10:27:10 [INFO] Expected eclipse log file: /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/target/eclipserun-work/data/.metadata/.log
10:27:10 [INFO] Command line:
10:27:10 	[/opt/tools/java/oracle/jdk-8/latest/jre/bin/java, -Xmx2048M, -jar, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/.repository/p2/osgi/bundle/org.eclipse.equinox.launcher/1.5.600.v20191014-2022/org.eclipse.equinox.launcher-1.5.600.v20191014-2022.jar, -install, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/target/eclipserun-work, -configuration, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/target/eclipserun-work/configuration, -data, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/../target/org.eclipse.jdt.core-apiAnalyzer-workspace, -application, org.eclipse.pde.api.tools.apiAnalyzer, -project, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core, -baseline, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/target/org.eclipse.jdt.core-apiBaseline.target, -dependencyList, /home/jenkins/agent/workspace/eclipse.jdt.core-Gerrit/org.eclipse.jdt.core/target/dependencies-list.txt, -failOnError]

10:28:03 org.eclipse.core.internal.resources.ResourceException: Errors occurred during the build.
10:28:03 	at org.eclipse.core.internal.resources.Project$1.run(Project.java:568)
10:28:03 	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292)
10:28:03 	at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:603)
10:28:03 	at org.eclipse.core.internal.resources.Project.build(Project.java:116)
10:28:03 	at org.eclipse.pde.api.tools.internal.ApiAnalysisApplication.start(ApiAnalysisApplication.java:128)
10:28:03 	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
10:28:03 	at org.eclipse.equinox.internal.app.AnyThreadAppLauncher.run(AnyThreadAppLauncher.java:30)
10:28:03 	at java.lang.Thread.run(Thread.java:748)
10:28:03 Contains: Errors running builder 'Java Builder' on project 'org.eclipse.jdt.core'.
10:28:03 java.lang.ClassCastException: org.eclipse.jdt.internal.compiler.ast.MessageSend cannot be cast to org.eclipse.jdt.internal.compiler.ast.AllocationExpression
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.FakedTrackingVariable.cleanUpAfterAssignment(FakedTrackingVariable.java:702)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Assignment.analyseCode(Assignment.java:89)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.IfStatement.analyseCode(IfStatement.java:109)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.TryStatement.analyseCode(TryStatement.java:182)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.ForeachStatement.analyseCode(ForeachStatement.java:133)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.IfStatement.analyseCode(IfStatement.java:109)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.LabeledStatement.analyseCode(LabeledStatement.java:58)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.IfStatement.analyseCode(IfStatement.java:109)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:48)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.TryStatement.analyseCode(TryStatement.java:182)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.analyseCode(MethodDeclaration.java:128)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.internalAnalyseCode(TypeDeclaration.java:774)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.analyseCode(TypeDeclaration.java:272)
10:28:03 	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.analyseCode(CompilationUnitDeclaration.java:132)
10:28:03 	at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:907)
10:28:03 	at org.eclipse.jdt.internal.compiler.ProcessTaskManager.run(ProcessTaskManager.java:145)
10:28:03 	at java.lang.Thread.run(Thread.java:748)

I believe I've tracked the problem down to the merged change related to bug 463320, merged yesterday and built last night.  I've describe the details in this comment:

  https://bugs.eclipse.org/bugs/show_bug.cgi?id=463320#c19

I've contributed what I'm pretty sure is the fix:

  https://git.eclipse.org/r/#/c/155009/

But ironically that verification build fails because it's using last-night's broken version of JDT to do api-analysis.  Somehow this commit will needs to be merged without first passing a verification build. 

And of course I wonder if (worry that) the normal integration builds also do api-analysis and will also fail, leaving us unable to fix this problem without some type of manual intervention.

Regards,
Ed

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