Program: 17438
Project: 17438
Buggy source:
public ICompletionProposal[] getTagProposals(IAssistState assistState){
  String mName="String_Node_Str";
  IDocument document=assistState.getIDocument();
  String attrText="String_Node_Str";
  String prefix="String_Node_Str";
  DefaultAssistState defaultAssistState=(DefaultAssistState)assistState;
  if (!inValidPartitionType(assistState)) {
    UserMsg(mName,"String_Node_Str" + assistState.getOffsetPartition().getType() + "String_Node_Str");
    return null;
  }
  char invokerChar;
  prefix=assistState.getDataSoFar();
  invokerChar=assistState.getTriggerData();
  prefix=prefix.substring(this.lastOpenChevronPos).trim();
  UserMsg("String_Node_Str","String_Node_Str" + prefix);
  ArrayList partItems=CFEContentAssist.getTokenisedString(prefix);
  if (partItems.size() > 1) {
    attrText=(String)partItems.get(partItems.size() - 1);
    UserMsg("String_Node_Str","String_Node_Str" + attrText);
  }
  boolean isDefinatelyAnAttribute=invokerChar == ' ';
  boolean invokerIsSpace=invokerChar == ' ';
  boolean invokerIsTab=invokerChar == '\t';
  boolean invokerIsCloseChevron=invokerChar == '>';
  boolean prefixHasOddQuotes=countQuotes(prefix) % 2 == 1;
  int prefixLength=prefix.length();
  if (attrText.indexOf("String_Node_Str") > 0 || attrText.indexOf("String_Node_Str") > 0) {
    attrText="String_Node_Str";
  }
  if (prefixHasOddQuotes) {
    UserMsg("String_Node_Str","String_Node_Str");
    DefaultAssistTagState attrTagState=prepareForAttributeAssist(assistState,attrText,prefix,partItems);
    return getAttributeValueProposals(attrTagState);
  }
 else   if (attrText.length() <= 0 && !invokerIsSpace && !invokerIsTab && !invokerIsCloseChevron && !isDefinatelyAnAttribute) {
    UserMsg("String_Node_Str","String_Node_Str");
    try {
      return getTagProposalsFromCACors(assistState);
    }
 catch (    BadLocationException ex) {
      System.err.println("String_Node_Str");
      ex.printStackTrace();
      return null;
    }
  }
 else   if (prefix.trim().length() > 0 || isDefinatelyAnAttribute) {
    UserMsg("String_Node_Str","String_Node_Str");
    if (partItems.size() == 0) {
      UserMsg(mName,"String_Node_Str");
      return null;
    }
    DefaultAssistTagState attrTagState=prepareForAttributeAssist(assistState,attrText,prefix,partItems);
    return getAttributeProposals(attrTagState,CFDocUtils.parseForAttributes(prefix));
  }
 else {
  }
  return null;
}

Fixed version (ground truth):
public ICompletionProposal[] getTagProposals(IAssistState assistState){
  String mName="String_Node_Str";
  IDocument document=assistState.getIDocument();
  String attrText="String_Node_Str";
  String prefix="String_Node_Str";
  DefaultAssistState defaultAssistState=(DefaultAssistState)assistState;
  if (!inValidPartitionType(assistState)) {
    UserMsg(mName,"String_Node_Str" + assistState.getOffsetPartition().getType() + "String_Node_Str");
    return null;
  }
  char invokerChar;
  prefix=assistState.getDataSoFar();
  invokerChar=assistState.getTriggerData();
  prefix=prefix.trim();
  UserMsg("String_Node_Str","String_Node_Str" + prefix);
  ArrayList partItems=CFEContentAssist.getTokenisedString(prefix);
  if (partItems.size() > 1) {
    attrText=(String)partItems.get(partItems.size() - 1);
    UserMsg("String_Node_Str","String_Node_Str" + attrText);
  }
  boolean isDefinatelyAnAttribute=invokerChar == ' ';
  boolean invokerIsSpace=invokerChar == ' ';
  boolean invokerIsTab=invokerChar == '\t';
  boolean invokerIsCloseChevron=invokerChar == '>';
  boolean prefixHasOddQuotes=countQuotes(prefix) % 2 == 1;
  int prefixLength=prefix.length();
  if (attrText.indexOf("String_Node_Str") > 0 || attrText.indexOf("String_Node_Str") > 0) {
    attrText="String_Node_Str";
  }
  if (prefixHasOddQuotes) {
    UserMsg("String_Node_Str","String_Node_Str");
    DefaultAssistTagState attrTagState=prepareForAttributeAssist(assistState,attrText,prefix,partItems);
    return getAttributeValueProposals(attrTagState);
  }
 else   if (attrText.length() <= 0 && !invokerIsSpace && !invokerIsTab && !invokerIsCloseChevron && !isDefinatelyAnAttribute) {
    UserMsg("String_Node_Str","String_Node_Str");
    try {
      return getTagProposalsFromCACors(assistState);
    }
 catch (    BadLocationException ex) {
      System.err.println("String_Node_Str");
      ex.printStackTrace();
      return null;
    }
  }
 else   if (prefix.trim().length() > 0 || isDefinatelyAnAttribute) {
    UserMsg("String_Node_Str","String_Node_Str");
    if (partItems.size() == 0) {
      UserMsg(mName,"String_Node_Str");
      return null;
    }
    DefaultAssistTagState attrTagState=prepareForAttributeAssist(assistState,attrText,prefix,partItems);
    return getAttributeProposals(attrTagState,CFDocUtils.parseForAttributes(prefix));
  }
 else {
  }
  return null;
}