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Hello JDT Team. I can across this error report while triaging Bug 470197 for the Code Recommenders project, whose symptoms are *very* similar. In fact, both stack traces include the very same line of code, albeit in different classes (SelectionRequestor here, InternalExtendedCompletionContext in Bug 470197): local.type == null ? Signature.createTypeSignature(binding.type.signableName(), true) : Util.typeSignature(local.type), From the trace alone I unfortunately cannot tell which branch was taken to ultimately produce the unparseable signature, but I think that we are dealing with a JavaElementHyperlinkDetector in one case and an ParameterGuessingProposal in the other merely means that there are two ways to trigger the same bug revolving around a LocalVariableBinding. Anyway, here's the original report from the automatic error reporter: code: 0 plugin: org.eclipse.ui_3.107.0.v20150315-0703 message: Unhandled event loop exception fingerprint: 4fc1b50c exception class: java.lang.IllegalArgumentException exception message: java.lang.Class<capture#3-of ?> number of children: 0 java.lang.IllegalArgumentException: java.lang.Class<capture#3-of ?> at org.eclipse.jdt.core.Signature.checkNextChar(Signature.java:1006) at org.eclipse.jdt.core.Signature.encodeTypeSignature(Signature.java:1449) at org.eclipse.jdt.core.Signature.createCharArrayTypeSignature(Signature.java:1075) at org.eclipse.jdt.core.Signature.createTypeSignature(Signature.java:1236) at org.eclipse.jdt.internal.core.SelectionRequestor.acceptLocalVariable(SelectionRequestor.java:466) at org.eclipse.jdt.internal.codeassist.SelectionEngine.selectFrom(SelectionEngine.java:1284) at org.eclipse.jdt.internal.codeassist.SelectionEngine.select(SelectionEngine.java:996) at org.eclipse.jdt.internal.core.Openable.codeSelect(Openable.java:163) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:377) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:371) at org.eclipse.jdt.internal.ui.javaeditor.JavaElementHyperlinkDetector.detectHyperlinks(JavaElementHyperlinkDetector.java:102) at org.eclipse.ui.texteditor.HyperlinkDetectorRegistry$HyperlinkDetectorDelegate.detectHyperlinks(HyperlinkDetectorRegistry.java:80) at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:289) at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:261) at org.eclipse.jface.text.hyperlink.HyperlinkManager.mouseMove(HyperlinkManager.java:469) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:212) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4203) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1475) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4045) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3672) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1112) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:993) 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:138) 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:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) General Information: reported-by: anonymous-id: 43b9d3b0-bf07-4c6f-9d11-7693b5f94f63 eclipse-build-id: 4.5.0.I20150320-0800 eclipse-product: org.eclipse.platform.ide operating system: MacOSX 10.10.3 (x86_64) - cocoa jre-version: 1.8.0_25-b17 The following plug-ins were present on the execution stack (*): 1. org.eclipse.core.databinding.observable_1.4.1.v20150311-0218 2. org.eclipse.core.databinding_1.4.100.v20150311-0216 3. org.eclipse.core.runtime_3.11.0.v20150316-1241 4. org.eclipse.e4.ui.workbench_1.3.0.v20150316-1403 5. org.eclipse.e4.ui.workbench.swt_0.12.100.v20150316-1403 6. org.eclipse.equinox.app_1.3.200.v20130910-1609 7. org.eclipse.equinox.launcher_1.3.0.v20140415-2008 8. org.eclipse.jdt_3.11.0.v20150320-0800 9. org.eclipse.jdt.core_3.11.0.v20150317-0048 10. org.eclipse.jdt.ui_3.11.0.v20150316-2042 11. org.eclipse.jface.text_3.10.0.v20150112-1146 12. org.eclipse.jface_3.11.0.v20150313-1544 13. org.eclipse.swt_3.104.0.v20150319-1901 14. org.eclipse.ui_3.107.0.v20150315-0703 15. org.eclipse.ui.ide.application_1.0.600.v20150315-1254 16. org.eclipse.ui.ide_3.11.0.v20150309-2044 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/5543572de4b04acfc3d24503 * 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.
*** Bug 470197 has been marked as a duplicate of this bug. ***
No progress yet and unlikely to get time during 4.6. Moving out.
Bulk move out of 4.8
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.
Looks like this java.lang.IllegalArgumentException: java.lang.Class<capture#3-of ?> indicates that "someone" requested encoding a signature that has a "#3" segment where none is expected. See usage of org.eclipse.jdt.core.Signature.CAPTURE which expects a whitespace after 'capture-of', not '#'
