Program: 161435
Project: 161435
Buggy source:
/** 
 * There are several places where a local variable can be "defined". First I check all localization constructs which are always function call like <code >Module[{blub},...]</code>. The complete list of localization constructs can be found in   {@link LocalizationConstruct.ConstructType}. <p/> Secondly I check the patterns in e.g. <code >f[var_]:=...</code> for <code >SetDelayed</code> and <code >TagSetDelayed</code>. <p/> Finally, <code >RuleDelayed</code> constructs are checked.
 * @param element Element to check for defining the {@link #myStartElement}.
 * @param state   State of the resolving.
 * @return <code >false</code> if the search can be stopped, <code >true</code> otherwise
 */
@Override public boolean execute(@NotNull PsiElement element,ResolveState state){
  if (element instanceof FunctionCall) {
    final FunctionCall functionCall=(FunctionCall)element;
    if (functionCall.isScopingConstruct()) {
      List<Symbol> vars=Lists.newArrayList();
      final LocalizationConstruct.ConstructType scopingConstruct=functionCall.getScopingConstruct();
      if (LocalizationConstruct.isFunctionLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalFunctionVariables(functionCall);
      }
      if (LocalizationConstruct.isModuleLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalModuleLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isTableLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalTableLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isManipulateLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalManipulateLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isCompileLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalCompileLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isLimitLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalLimitVariables(functionCall);
      }
      for (      Symbol v : vars) {
        if (v.getSymbolName().equals(myStartElement.getSymbolName())) {
          myReferringSymbol=v;
          myLocalizationSymbol=element.getFirstChild();
          myLocalization=scopingConstruct;
          return false;
        }
      }
    }
  }
 else   if (element instanceof SetDelayed || element instanceof TagSetDelayed) {
    MathematicaPatternVisitor patternVisitor=new MathematicaPatternVisitor();
    element.accept(patternVisitor);
    for (    Symbol p : patternVisitor.getMyPatternSymbols()) {
      if (p.getSymbolName().equals(myStartElement.getSymbolName())) {
        myReferringSymbol=p;
        myLocalization=LocalizationConstruct.ConstructType.SETDELAYEDPATTERN;
        return false;
      }
    }
  }
 else   if (element instanceof RuleDelayed) {
    PsiElement lhs=element.getFirstChild();
    MathematicaPatternVisitor patternVisitor=new MathematicaPatternVisitor();
    lhs.accept(patternVisitor);
    for (    Symbol symbol : patternVisitor.getMyPatternSymbols()) {
      if (symbol.getSymbolName().equals(myStartElement.getSymbolName())) {
        myReferringSymbol=symbol;
        myLocalization=LocalizationConstruct.ConstructType.RULEDELAYED;
        return false;
      }
    }
  }
  return true;
}

Fixed version (ground truth):
/** 
 * There are several places where a local variable can be "defined". First I check all localization constructs which are always function call like <code >Module[{blub},...]</code>. The complete list of localization constructs can be found in   {@link LocalizationConstruct.ConstructType}. <p/> Secondly I check the patterns in e.g. <code >f[var_]:=...</code> for <code >SetDelayed</code> and <code >TagSetDelayed</code>. <p/> Finally, <code >RuleDelayed</code> constructs are checked.
 * @param element Element to check for defining the {@link #myStartElement}.
 * @param state   State of the resolving.
 * @return <code >false</code> if the search can be stopped, <code >true</code> otherwise
 */
@Override public boolean execute(@NotNull PsiElement element,ResolveState state){
  if (element instanceof FunctionCall) {
    final FunctionCall functionCall=(FunctionCall)element;
    if (functionCall.isScopingConstruct()) {
      List<Symbol> vars=Lists.newArrayList();
      final LocalizationConstruct.ConstructType scopingConstruct=functionCall.getScopingConstruct();
      if (LocalizationConstruct.isFunctionLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalFunctionVariables(functionCall);
      }
      if (LocalizationConstruct.isModuleLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalModuleLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isTableLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalTableLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isManipulateLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalManipulateLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isCompileLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalCompileLikeVariables(functionCall);
      }
      if (LocalizationConstruct.isLimitLike(scopingConstruct)) {
        vars=MathematicaPsiUtililities.getLocalLimitVariables(functionCall);
      }
      for (      Symbol v : vars) {
        if (v.getSymbolName().equals(myStartElement.getSymbolName())) {
          myReferringSymbol=v;
          myLocalizationSymbol=element.getFirstChild();
          myLocalization=scopingConstruct;
          return false;
        }
      }
    }
  }
 else   if (element instanceof SetDelayed || element instanceof TagSetDelayed) {
    MathematicaPatternVisitor patternVisitor=new MathematicaPatternVisitor();
    element.accept(patternVisitor);
    for (    Symbol p : patternVisitor.getMyPatternSymbols()) {
      if (p.getSymbolName().equals(myStartElement.getSymbolName())) {
        myReferringSymbol=p;
        myLocalization=LocalizationConstruct.ConstructType.SETDELAYEDPATTERN;
        myLocalizationSymbol=element;
        return false;
      }
    }
  }
 else   if (element instanceof RuleDelayed) {
    PsiElement lhs=element.getFirstChild();
    MathematicaPatternVisitor patternVisitor=new MathematicaPatternVisitor();
    lhs.accept(patternVisitor);
    for (    Symbol symbol : patternVisitor.getMyPatternSymbols()) {
      if (symbol.getSymbolName().equals(myStartElement.getSymbolName())) {
        myReferringSymbol=symbol;
        myLocalization=LocalizationConstruct.ConstructType.RULEDELAYED;
        myLocalizationSymbol=element;
        return false;
      }
    }
  }
  return true;
}