Program: 84674
Project: 84674
Buggy source:
@Override public void parse(IParserManager pm,IToken token) throws SyntaxError {
  int type=token.type();
  if (this.mode == NAME) {
    if (ParserUtil.isIdentifier(type)) {
      Name name=token.nameValue();
      if (name == Name.plus || name == Name.minus) {
        IToken next=token.next();
        if (ParserUtil.isIdentifier(next.type())) {
          Variance v=name == Name.minus ? Variance.CONTRAVARIANT : Variance.CONTRAVARIANT;
          this.variable=new TypeVariable(next,this.generic,next.nameValue(),v);
          this.mode=TYPE_VARIABLE;
          pm.skip();
          return;
        }
      }
      this.variable=new TypeVariable(token,this.generic,token.nameValue(),Variance.INVARIANT);
      this.mode=TYPE_VARIABLE;
      return;
    }
    throw new SyntaxError(token,"String_Node_Str");
  }
  if (this.mode == TYPE_VARIABLE) {
    if (ParserUtil.isTerminator(type)) {
      if (this.variable != null) {
        this.generic.addTypeVariable(this.variable);
      }
      pm.popParser(true);
      return;
    }
    if (!ParserUtil.isIdentifier(type)) {
      if (this.variable != null) {
        this.generic.addTypeVariable(this.variable);
      }
      pm.popParser(true);
      throw new SyntaxError(token,"String_Node_Str");
    }
    Name name=token.nameValue();
    if (this.boundMode == 0) {
      if (name == Name.gtcolon) {
        pm.pushParser(new TypeParser(this));
        this.boundMode=LOWER;
        return;
      }
      if (name == Name.ltcolon) {
        pm.pushParser(new TypeParser(this));
        this.boundMode=UPPER;
        return;
      }
    }
 else     if (this.boundMode == UPPER) {
      if (name == Name.amp) {
        pm.pushParser(new TypeParser(this));
        return;
      }
    }
    this.generic.addTypeVariable(this.variable);
    pm.popParser(true);
    return;
  }
}

Fixed version (ground truth):
@Override public void parse(IParserManager pm,IToken token) throws SyntaxError {
  int type=token.type();
  if (this.mode == NAME) {
    if (ParserUtil.isIdentifier(type)) {
      Name name=token.nameValue();
      if (name == Name.plus || name == Name.minus) {
        IToken next=token.next();
        if (ParserUtil.isIdentifier(next.type())) {
          Variance v=name == Name.minus ? Variance.CONTRAVARIANT : Variance.COVARIANT;
          this.variable=new TypeVariable(next,this.generic,next.nameValue(),v);
          this.mode=TYPE_VARIABLE;
          pm.skip();
          return;
        }
      }
      this.variable=new TypeVariable(token,this.generic,token.nameValue(),Variance.INVARIANT);
      this.mode=TYPE_VARIABLE;
      return;
    }
    throw new SyntaxError(token,"String_Node_Str");
  }
  if (this.mode == TYPE_VARIABLE) {
    if (ParserUtil.isTerminator(type)) {
      if (this.variable != null) {
        this.generic.addTypeVariable(this.variable);
      }
      pm.popParser(true);
      return;
    }
    if (!ParserUtil.isIdentifier(type)) {
      if (this.variable != null) {
        this.generic.addTypeVariable(this.variable);
      }
      pm.popParser(true);
      throw new SyntaxError(token,"String_Node_Str");
    }
    Name name=token.nameValue();
    if (this.boundMode == 0) {
      if (name == Name.gtcolon) {
        pm.pushParser(new TypeParser(this));
        this.boundMode=LOWER;
        return;
      }
      if (name == Name.ltcolon) {
        pm.pushParser(new TypeParser(this));
        this.boundMode=UPPER;
        return;
      }
    }
 else     if (this.boundMode == UPPER) {
      if (name == Name.amp) {
        pm.pushParser(new TypeParser(this));
        return;
      }
    }
    this.generic.addTypeVariable(this.variable);
    pm.popParser(true);
    return;
  }
}