Program: 61523
Project: 61523
Buggy source:
private boolean calculateDebugFileLine(String debugFile,int debugLine,int pos,ABC abc,Set<Integer> seen){
  while (pos < code.size()) {
    AVM2Instruction ins=code.get(pos);
    if (seen.contains(pos)) {
      return true;
    }
    seen.add(pos);
    if (ins.definition instanceof DebugFileIns) {
      debugFile=abc.constants.getString(ins.operands[0]);
    }
    if (ins.definition instanceof DebugLineIns) {
      debugLine=ins.operands[0];
    }
    ins.setFileLine(debugFile,debugLine);
    if (ins.definition instanceof NewFunctionIns) {
      if ((pos + 1 < code.size()) && !(code.get(pos + 1).definition instanceof PopIns)) {
        MethodBody innerBody=abc.findBody(ins.operands[0]);
        innerBody.getCode().calculateDebugFileLine(debugFile,debugLine,0,abc,new HashSet<>());
      }
    }
    if (ins.definition instanceof ReturnValueIns) {
      return true;
    }
    if (ins.definition instanceof ReturnVoidIns) {
      return true;
    }
    if (ins.definition instanceof JumpIns) {
      try {
        pos=adr2pos(pos2adr(pos) + ins.getBytesLength() + ins.operands[0]);
        continue;
      }
 catch (      ConvertException ex) {
        return false;
      }
    }
 else     if (ins.definition instanceof IfTypeIns) {
      try {
        int newpos=adr2pos(pos2adr(pos) + ins.getBytesLength() + ins.operands[0]);
        calculateDebugFileLine(debugFile,debugLine,newpos,abc,seen);
      }
 catch (      ConvertException ex) {
        return false;
      }
    }
    if (ins.definition instanceof LookupSwitchIns) {
      for (int i=0; i < ins.operands.length; i++) {
        if (i == 1) {
          continue;
        }
        try {
          int newpos=adr2pos(pos2adr(pos) + ins.operands[i]);
          if (!calculateDebugFileLine(debugFile,debugLine,newpos,abc,seen)) {
            return false;
          }
        }
 catch (        ConvertException ex) {
          return false;
        }
      }
    }
    pos++;
  }
  return true;
}

Fixed version (ground truth):
private boolean calculateDebugFileLine(String debugFile,int debugLine,int pos,ABC abc,Set<Integer> seen){
  while (pos < code.size()) {
    AVM2Instruction ins=code.get(pos);
    if (seen.contains(pos)) {
      return true;
    }
    seen.add(pos);
    if (ins.definition instanceof DebugFileIns) {
      debugFile=abc.constants.getString(ins.operands[0]);
    }
    if (ins.definition instanceof DebugLineIns) {
      debugLine=ins.operands[0];
    }
    ins.setFileLine(debugFile,debugLine);
    if (ins.definition instanceof NewFunctionIns) {
      if ((pos + 1 < code.size()) && !(code.get(pos + 1).definition instanceof PopIns)) {
        MethodBody innerBody=abc.findBody(ins.operands[0]);
        if (innerBody != null) {
          innerBody.getCode().calculateDebugFileLine(debugFile,debugLine,0,abc,new HashSet<>());
        }
      }
    }
    if (ins.definition instanceof ReturnValueIns) {
      return true;
    }
    if (ins.definition instanceof ReturnVoidIns) {
      return true;
    }
    if (ins.definition instanceof JumpIns) {
      try {
        pos=adr2pos(pos2adr(pos) + ins.getBytesLength() + ins.operands[0]);
        continue;
      }
 catch (      ConvertException ex) {
        return false;
      }
    }
 else     if (ins.definition instanceof IfTypeIns) {
      try {
        int newpos=adr2pos(pos2adr(pos) + ins.getBytesLength() + ins.operands[0]);
        calculateDebugFileLine(debugFile,debugLine,newpos,abc,seen);
      }
 catch (      ConvertException ex) {
        return false;
      }
    }
    if (ins.definition instanceof LookupSwitchIns) {
      for (int i=0; i < ins.operands.length; i++) {
        if (i == 1) {
          continue;
        }
        try {
          int newpos=adr2pos(pos2adr(pos) + ins.operands[i]);
          if (!calculateDebugFileLine(debugFile,debugLine,newpos,abc,seen)) {
            return false;
          }
        }
 catch (        ConvertException ex) {
          return false;
        }
      }
    }
    pos++;
  }
  return true;
}