[Resource Leak Analysis] NPE and build failure

[david-x64]

I have encountered a compile error on a switch expression.
It seems the error only happens when an Object implementing AutoCloseable is involved.

I have created a minimum reproducable example here:
compile-error-switch example on github

There is no error compiling with OpenJDK Compiler, but in Eclipse it produces this error:

Internal compiler error: java.lang.RuntimeException:
Internal Error compiling /test/src/org/example/ExampleService.java
at org.eclipse.jdt.internal.compiler.ProcessTaskManager.compile(ProcessTaskManager.java:167)

---

Tested on Linux Mint 22.

openjdk 21.0.5 2024-10-15
OpenJDK Runtime Environment (build 21.0.5+11-Ubuntu-1ubuntu124.04)
OpenJDK 64-Bit Server VM (build 21.0.5+11-Ubuntu-1ubuntu124.04, mixed mode, sharing)

Eclipse IDE for Java Developers (includes Incubating components)

Version: 2024-09 (4.33.0)
Build id: 20240905-0614

maven-3.9.9

[iloveeclipse]

Could you please try latest Eclipse build from https://download.eclipse.org/eclipse/downloads/drops4/I20241119-0600/?
This area was heavily modified recently.

[srikanth-sankaran]

Fails on master too: This doesn't involve switch expression per se, but is arising from resource leak analysis code. (Changed subject/title to reflect that.)

@stephan-herrmann - surprised to see this code run even when the annotation based resource analysis is turned off.
Thanks for taking a look.

Caused by: java.lang.NullPointerException: Cannot read field "binding" because "tracker2" is null
at org.eclipse.jdt.internal.compiler.ast.FakedTrackingVariable.pickMoreUnsafe(FakedTrackingVariable.java:576)
at org.eclipse.jdt.internal.compiler.ast.FakedTrackingVariable.analyseCloseableExpression(FakedTrackingVariable.java:896)
at org.eclipse.jdt.internal.compiler.ast.FakedTrackingVariable.handleResourceAssignment(FakedTrackingVariable.java:775)
at org.eclipse.jdt.internal.compiler.ast.LocalDeclaration.analyseCode(LocalDeclaration.java:113)
at org.eclipse.jdt.internal.compiler.ast.Block.analyseCode(Block.java:52)
at org.eclipse.jdt.internal.compiler.ast.ForeachStatement.analyseCode(ForeachStatement.java:136)
at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.analyseCode(MethodDeclaration.java:160)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.internalAnalyseCode(TypeDeclaration.java:975)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.analyseCode(TypeDeclaration.java:319)
at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.analyseCode(CompilationUnitDeclaration.java:127)
at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1116)
at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1155)
at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:292)
at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:358)
at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:243)
at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:108)
at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:751)
at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:816)
at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1419)
at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1378)
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:139)
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcilingStrategy.java:94)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:91)
at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:158)
at org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.reconcile(CompositeReconcilingStrategy.java:94)
at org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.reconcile(JavaCompositeReconcilingStrategy.java:107)
at org.eclipse.jface.text.reconciler.MonoReconciler.process(MonoReconciler.java:78)
at org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(AbstractReconciler.java:207)

[jukzi]

caused by 4989c7f