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Unfortunately, the respective lines in JDT just use "throw new IllegalArgumentExpression()", without logging anything about the actual arguments used. Will request more verbose logging from JDT. == The following incident was reported via the automated error reporting: code: 1 plugin: org.eclipse.recommenders.completion.rcp_2.2.0.v20150609-1848 message: Session processor ‘class org.eclipse.recommenders.internal.calls.rcp.CallCompletionSessionProcessor’ failed with exception. fingerprint: 4d10a7f8 exception class: java.lang.IllegalArgumentException exception message: - number of children: 0 java.lang.IllegalArgumentException: null at org.eclipse.jdt.internal.compiler.util.Util.scanClassTypeSignature(Util.java:1412) at org.eclipse.jdt.internal.compiler.util.Util.scanTypeSignature(Util.java:1217) at org.eclipse.jdt.core.Signature.getReturnType(Signature.java:1772) at org.eclipse.recommenders.completion.rcp.utils.ProposalUtils.toMethodName(ProposalUtils.java:106) at org.eclipse.recommenders.internal.completion.rcp.ProposalNameProvider.toMethodName(ProposalNameProvider.java:27) at org.eclipse.recommenders.internal.calls.rcp.CallCompletionSessionProcessor.process(CallCompletionSessionProcessor.java:203) at org.eclipse.recommenders.completion.rcp.processable.IntelligentCompletionProposalComputer.fireProcessProposal(IntelligentCompletionProposalComputer.java:270) at org.eclipse.recommenders.completion.rcp.processable.IntelligentCompletionProposalComputer.computeCompletionProposals(IntelligentCompletionProposalComputer.java:148) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:333) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:337) at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:322) at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:279) at org.eclipse.jface.text.contentassist.ContentAssistant$5.run(ContentAssistant.java:1904) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1902) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:573) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:570) at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:505) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:499) at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:384) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3794) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3433) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608) at org.eclipse.equinox.launcher.Main.run(Main.java:1515) at org.eclipse.equinox.launcher.Main.main(Main.java:1488) General Information: reported-by: anonymous-id: 014392aa-e5ea-4b75-a316-126e2b3a97a2 eclipse-build-id: 4.5.0.I20150603-2000 eclipse-product: org.eclipse.epp.package.jee.product operating system: Linux 3.16.0 (x86_64) - gtk jre-version: 1.7.0_79-b14 The following plug-ins were present on the execution stack (*): 1. org.eclipse.core.databinding.observable_1.5.0.v20150422-0725 2. org.eclipse.core.databinding_1.5.0.v20150422-0725 3. org.eclipse.core.runtime_3.11.0.v20150405-1723 4. org.eclipse.e4.ui.workbench_1.3.0.v20150531-1948 5. org.eclipse.e4.ui.workbench.swt_0.13.0.v20150504-0621 6. org.eclipse.equinox.app_1.3.300.v20150423-1356 7. org.eclipse.equinox.launcher_1.3.100.v20150511-1540 8. org.eclipse.jdt_3.11.0.v20150603-2000 9. org.eclipse.jdt.core_3.11.0.v20150602-1242 10. org.eclipse.jdt.ui_3.11.0.v20150527-0925 11. org.eclipse.jface.text_3.10.0.v20150603-1752 12. org.eclipse.jface_3.11.0.v20150602-1400 13. org.eclipse.recommenders.calls.rcp_2.2.0.v20150609-1848 14. org.eclipse.recommenders.calls_2.2.0.v20150609-1848 15. org.eclipse.recommenders.completion.rcp_2.2.0.v20150609-1848 16. org.eclipse.swt_3.104.0.v20150528-0211 17. org.eclipse.ui_3.107.0.v20150507-1945 18. org.eclipse.ui.ide.application_1.1.0.v20150422-0725 19. org.eclipse.ui.ide_3.11.0.v20150510-1749 Please note that: * Messages, stacktraces, and nested status objects may be shortened. * Bug fields like status, resolution, and whiteboard are sent back to reporters. * The list of present bundles and their respective versions was calculated by package naming heuristics. This may or may not reflect reality. Other Resources: * Report: https://dev.eclipse.org/recommenders/committers/confess/#/problems/559acacde4b08735226bb711 * Manual: https://dev.eclipse.org/recommenders/community/confess/#/guide Thank you for your assistance. Your friendly error-reports-inbox. This bug was created on behalf of andreas.sewe@codetrails.com.
Like Bug 471266, this is hard to resolve without the JDT throwing more informative IAEs. (FYI, this has been requested in Bug 471270 already.)
(In reply to Andreas Sewe from comment #1) > Like Bug 471266, this is hard to resolve without the JDT throwing more > informative IAEs. (FYI, this has been requested in Bug 471270 already.) Note: Bug 471270 improved IllegalArgumentExceptions in org.eclipse.jdt.internal.core.util.Util, but here the problem occurs in org.eclipse.jdt.internal.*compiler*.util.Util. For that class, IllegalArgumentExceptions still lack information.
Bug 471266 also suffers from a lack of information in IllegalArgumentException messages in org.eclipse.jdt.internal.*compiler*.util.Util.
