Program: 62162
Project: 62162
Buggy source:
public void load(int methodInfoIndex,ABC abc){
  this.abc=abc;
  if (methodInfoIndex <= 0) {
    paramEditor.setText("String_Node_Str");
  }
  methodIndexLabel.setText("String_Node_Str" + methodInfoIndex);
  this.methodInfo=abc.method_info[methodInfoIndex];
  int p=0;
  String ret="String_Node_Str";
  int optParPos=0;
  if (methodInfo.flagHas_optional()) {
    optParPos=methodInfo.param_types.length - methodInfo.optional.length;
  }
  for (  int ptype : methodInfo.param_types) {
    if (p > 0) {
      ret+="String_Node_Str";
    }
    if (methodInfo.flagHas_paramnames() && Configuration.PARAM_NAMES_ENABLE) {
      ret=ret + abc.constants.constant_string[methodInfo.paramNames[p]];
    }
 else {
      ret=ret + "String_Node_Str" + (p + 1);
    }
    ret+="String_Node_Str";
    if (ptype == 0) {
      ret+="String_Node_Str";
    }
 else {
      ret+="String_Node_Str" + ptype + "String_Node_Str"+ Helper.escapeString(abc.constants.constant_multiname[ptype].toString(abc.constants,new ArrayList<String>()))+ "String_Node_Str";
    }
    if (methodInfo.flagHas_optional()) {
      if (p >= optParPos) {
        ret+="String_Node_Str" + methodInfo.optional[p - optParPos].toString(abc.constants);
      }
    }
    p++;
  }
  if (methodInfo.flagNeed_rest()) {
    ret+="String_Node_Str";
  }
  paramEditor.setText(ret);
  if (methodInfo.ret_type == 0) {
    returnTypeEditor.setText("String_Node_Str");
  }
 else {
    returnTypeEditor.setText("String_Node_Str" + methodInfo.ret_type + "String_Node_Str"+ Helper.escapeString(abc.constants.constant_multiname[methodInfo.ret_type].toString(abc.constants,new ArrayList<String>()))+ "String_Node_Str");
  }
}

Fixed version (ground truth):
public void load(int methodInfoIndex,ABC abc){
  this.abc=abc;
  if (methodInfoIndex <= 0) {
    paramEditor.setText("String_Node_Str");
  }
  methodIndexLabel.setText("String_Node_Str" + methodInfoIndex);
  this.methodInfo=abc.method_info[methodInfoIndex];
  int p=0;
  String ret="String_Node_Str";
  int optParPos=0;
  if (methodInfo.flagHas_optional()) {
    optParPos=methodInfo.param_types.length - methodInfo.optional.length;
  }
  for (  int ptype : methodInfo.param_types) {
    if (p > 0) {
      ret+="String_Node_Str";
    }
    if (methodInfo.flagHas_paramnames() && Configuration.PARAM_NAMES_ENABLE) {
      ret=ret + abc.constants.constant_string[methodInfo.paramNames[p]];
    }
 else {
      ret=ret + "String_Node_Str" + (p + 1);
    }
    ret+="String_Node_Str";
    if (ptype == 0) {
      ret+="String_Node_Str";
    }
 else {
      ret+="String_Node_Str" + ptype + "String_Node_Str"+ Helper.escapeString(abc.constants.constant_multiname[ptype].toString(abc.constants,new ArrayList<String>()))+ "String_Node_Str";
    }
    if (methodInfo.flagHas_optional()) {
      if (p >= optParPos) {
        ret+="String_Node_Str" + methodInfo.optional[p - optParPos].toString(abc.constants);
      }
    }
    p++;
  }
  if (methodInfo.flagNeed_rest()) {
    if (p > 0) {
      ret+="String_Node_Str";
    }
    ret+="String_Node_Str";
  }
  paramEditor.setText(ret);
  if (methodInfo.ret_type == 0) {
    returnTypeEditor.setText("String_Node_Str");
  }
 else {
    returnTypeEditor.setText("String_Node_Str" + methodInfo.ret_type + "String_Node_Str"+ Helper.escapeString(abc.constants.constant_multiname[methodInfo.ret_type].toString(abc.constants,new ArrayList<String>()))+ "String_Node_Str");
  }
}