AI Coder completion failed with java.lang.StringIndexOutOfBoundsException · Issue #18 · hetzge/eclipse-ai-coder · GitHub
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AI Coder completion failed with java.lang.StringIndexOutOfBoundsException #18

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AI Coder completion failed with java.lang.StringIndexOutOfBoundsException#18

Description

@jridge-ezclocker
jridge-ezclocker
opened on Sep 25, 2026

Passing along AI Coder completion failed error reported in Eclipse Error Log (hope this helps). I've seen this error in the logs multiple times. Normally shows up when I click into a Java file to begin editing.

Installed Plugin

Name Version Id Provider
AI Coder v1.0.0.202607302026 de.hetzge.eclipse.aicoder.feature.feature.group null

Message: AI Coder completion failed

Stack Trace:

java.lang.StringIndexOutOfBoundsException
	at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:483)
	at java.base/java.util.concurrent.ForkJoinTask.getException(ForkJoinTask.java:564)
	at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:580)
	at java.base/java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:670)
	at java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:684)
	at java.base/java.util.stream.Nodes.collect(Nodes.java:326)
	at java.base/java.util.stream.ReferencePipeline.evaluateToNode(ReferencePipeline.java:129)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:630)
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:291)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:652)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:658)
	at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:663)
	at de.hetzge.eclipse.aicoder.context.RootContextEntry.create(RootContextEntry.java:82)
	at de.hetzge.eclipse.aicoder.inline.InlineCompletionController$2.run(InlineCompletionController.java:236)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.lang.StringIndexOutOfBoundsException: Range [3562, 3561) out of bounds for length 5031
	at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55)
	at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52)
	at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213)
	at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210)
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Preconditions.java:112)
	at java.base/jdk.internal.util.Preconditions.checkFromToIndex(Preconditions.java:349)
	at java.base/java.lang.String.checkBoundsBeginEnd(String.java:5224)
	at java.base/java.lang.String.substring(String.java:3186)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleContentElements(CoreJavadocAccessImpl.java:774)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleInlineTagElement(CoreJavadocAccessImpl.java:962)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleContentElements(CoreJavadocAccessImpl.java:784)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleContentElements(CoreJavadocAccessImpl.java:740)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleSingleTag(CoreJavadocAccessImpl.java:1256)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.handleBlockTags(CoreJavadocAccessImpl.java:1247)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.elementToHTML(CoreJavadocAccessImpl.java:399)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccessImpl.toHTML(CoreJavadocAccessImpl.java:166)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccess.javadoc2HTML(CoreJavadocAccess.java:469)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccess.getHTMLContentFromSource(CoreJavadocAccess.java:372)
	at org.eclipse.jdt.core.manipulation.internal.javadoc.CoreJavadocAccess.getHTMLContent(CoreJavadocAccess.java:229)
	at org.eclipse.jdt.internal.ui.text.javadoc.JavadocContentAccess2.getHTMLContent(JavadocContentAccess2.java:49)
	at de.hetzge.eclipse.aicoder.util.EclipseUtils.getJavadoc(EclipseUtils.java:190)
	at de.hetzge.eclipse.aicoder.context.TypeMemberContextEntry.create(TypeMemberContextEntry.java:61)
	at de.hetzge.eclipse.aicoder.context.TypeContextEntry.create(TypeContextEntry.java:84)
	at de.hetzge.eclipse.aicoder.util.LambdaExceptionUtils.lambda$2(LambdaExceptionUtils.java:67)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:186)
	at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:803)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:315)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:153)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:176)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:632)
	at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:293)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:635)
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:291)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:652)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:658)
	at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:663)
	at de.hetzge.eclipse.aicoder.context.SuperContextEntry.create(SuperContextEntry.java:51)
	at de.hetzge.eclipse.aicoder.context.SuperContextEntry.lambda$0(SuperContextEntry.java:42)
	at de.hetzge.eclipse.aicoder.context.RootContextEntry.lambda$2(RootContextEntry.java:79)
	at de.hetzge.eclipse.aicoder.util.LambdaExceptionUtils.lambda$2(LambdaExceptionUtils.java:67)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:214)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
	at java.base/java.util.stream.Nodes$SizedCollectorTask.compute(Nodes.java:1886)
	at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:759)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:511)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1450)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2019)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)

Session Data:

  • eclipse.buildId=4.41.0.202609040801
  • java.version=26.0.2.1
  • java.vendor=Eclipse Adoptium
  • BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
  • Framework arguments: -product org.springframework.boot.ide.branding.springtools
  • Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.springframework.boot.ide.branding.springtools

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