Program: 37414
Project: 37414
Buggy source:
private Types.Source convertDebuggerSourceToClient(Location location,IDebugAdapterContext context) throws URISyntaxException {
  final String fullyQualifiedName=location.declaringType().name();
  String sourceName="String_Node_Str";
  String relativeSourcePath="String_Node_Str";
  try {
    sourceName=location.sourceName();
    relativeSourcePath=location.sourcePath();
  }
 catch (  AbsentInformationException e) {
    String enclosingType=AdapterUtils.parseEnclosingType(fullyQualifiedName);
    sourceName=enclosingType.substring(enclosingType.lastIndexOf('.') + 1) + "String_Node_Str";
    relativeSourcePath=enclosingType.replace('.','/') + "String_Node_Str";
  }
  final String finalRelativeSourcePath=relativeSourcePath;
  String uri=context.getSourceLookupCache().computeIfAbsent(fullyQualifiedName,key -> context.getProvider(ISourceLookUpProvider.class).getSourceFileURI(key,finalRelativeSourcePath));
  if (uri != null) {
    String clientPath=AdapterUtils.convertPath(uri,context.isDebuggerPathsAreUri(),context.isClientPathsAreUri());
    if (uri.startsWith("String_Node_Str")) {
      return new Types.Source(sourceName,clientPath,0);
    }
 else {
      return new Types.Source(sourceName,clientPath,context.createSourceReference(uri));
    }
  }
 else {
    String absoluteSourcepath=AdapterUtils.sourceLookup(context.getSourcePaths(),relativeSourcePath);
    if (absoluteSourcepath != null) {
      return new Types.Source(sourceName,absoluteSourcepath,0);
    }
 else {
      return null;
    }
  }
}

Fixed version (ground truth):
private Types.Source convertDebuggerSourceToClient(Location location,IDebugAdapterContext context) throws URISyntaxException {
  final String fullyQualifiedName=location.declaringType().name();
  String sourceName="String_Node_Str";
  String relativeSourcePath="String_Node_Str";
  try {
    sourceName=location.sourceName();
    relativeSourcePath=location.sourcePath();
  }
 catch (  AbsentInformationException e) {
    String enclosingType=AdapterUtils.parseEnclosingType(fullyQualifiedName);
    sourceName=enclosingType.substring(enclosingType.lastIndexOf('.') + 1) + "String_Node_Str";
    relativeSourcePath=enclosingType.replace('.','/') + "String_Node_Str";
  }
  final String finalRelativeSourcePath=relativeSourcePath;
  String uri=context.getSourceLookupCache().computeIfAbsent(fullyQualifiedName,key -> {
    String fromProvider=context.getProvider(ISourceLookUpProvider.class).getSourceFileURI(key,finalRelativeSourcePath);
    return StringUtils.isBlank(fromProvider) ? "String_Node_Str" : fromProvider;
  }
);
  if (!StringUtils.isBlank(uri)) {
    String clientPath=AdapterUtils.convertPath(uri,context.isDebuggerPathsAreUri(),context.isClientPathsAreUri());
    if (uri.startsWith("String_Node_Str")) {
      return new Types.Source(sourceName,clientPath,0);
    }
 else {
      return new Types.Source(sourceName,clientPath,context.createSourceReference(uri));
    }
  }
 else {
    String absoluteSourcepath=AdapterUtils.sourceLookup(context.getSourcePaths(),relativeSourcePath);
    if (absoluteSourcepath != null) {
      return new Types.Source(sourceName,absoluteSourcepath,0);
    }
 else {
      return null;
    }
  }
}