fix: NPE when file is stored in semantic cache location where rawLocation returns null

[Will-ShaoHua]

…

Issue #, if available:

After

eclipse-auto-trigger-bug-fix.mov

Description of changes:

ENTRY amazon-q-eclipse 4 0 2026-01-08 08:49:37.656
!MESSAGE Error processing inline completion request 68de3c55-64e5-4a70-aad1-68ed3fe1968d
!STACK 0
java.util.concurrent.ExecutionException: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request aws/textDocument/inlineCompletionWithReferences failed with message: Cannot read properties of undefined (reading 'uri')
	at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
	at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073)
	at software.aws.toolkits.eclipse.amazonq.util.QInvocationSession.processRequest(QInvocationSession.java:220)
	at software.aws.toolkits.eclipse.amazonq.util.QInvocationSession.lambda$1(QInvocationSession.java:192)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)
Caused by: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request aws/textDocument/inlineCompletionWithReferences failed with message: Cannot read properties of undefined (reading 'uri')
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleResponse(RemoteEndpoint.java:220)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:204)
	at software.aws.toolkits.eclipse.amazonq.lsp.AmazonQLspServerBuilder.lambda$2(AmazonQLspServerBuilder.java:105)
	at org.eclipse.lsp4e.LanguageServerWrapper.lambda$3(LanguageServerWrapper.java:449)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)

!ENTRY amazon-q-eclipse 4 0 2026-01-08 08:49:40.237
!MESSAGE Unexpected error when determining open file path
!STACK 0
java.lang.NullPointerException: Cannot invoke "org.eclipse.core.runtime.IPath.toOSString()" because the return value of "org.eclipse.core.resources.IFile.getRawLocation()" is null
	at software.aws.toolkits.eclipse.amazonq.util.QEclipseEditorUtils.getOpenFilePath(QEclipseEditorUtils.java:149)
	at software.aws.toolkits.eclipse.amazonq.util.QEclipseEditorUtils.getOpenFileUri(QEclipseEditorUtils.java:121)
	at software.aws.toolkits.eclipse.amazonq.util.InlineCompletionUtils.cwParamsFromContext(InlineCompletionUtils.java:26)
	at software.aws.toolkits.eclipse.amazonq.util.QInvocationSession.invoke(QInvocationSession.java:162)
	at software.aws.toolkits.eclipse.amazonq.util.AutoTriggerDocumentListener.documentChanged(AutoTriggerDocumentListener.java:53)
	at org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged2(AbstractDocument.java:762)
	at org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged(AbstractDocument.java:730)
	at org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged(AbstractDocument.java:714)
	at org.eclipse.jface.text.AbstractDocument.fireDocumentChanged(AbstractDocument.java:790)
	at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1132)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.replace(SynchronizableDocument.java:271)
	at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1150)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.replace(SynchronizableDocument.java:259)
	at org.eclipse.jface.text.DefaultDocumentAdapter.replaceTextRange(DefaultDocumentAdapter.java:225)
	at org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:7188)
	at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:8088)
	at org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2069)
	at org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5771)
	at org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5802)
	at org.eclipse.swt.custom.StyledText.lambda$32(StyledText.java:5481)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4364)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1217)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1241)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1226)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1268)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1264)
	at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1747)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4982)
	at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:341)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4859)
	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:336)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5132)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(Native Method)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3748)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1147)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1038)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:677)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:185)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1415)

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