Program: 44017
Project: 44017
Buggy source:
public void debugHooks(int pc){
  if (exiting) {
    throw new AbortException("String_Node_Str");
  }
  if (DebugUtils.IS_DEBUG)   DebugUtils.println("String_Node_Str" + pc + "String_Node_Str");
synchronized (this) {
    while (!isStarted) {
      try {
        this.wait();
      }
 catch (      InterruptedException e) {
        e.printStackTrace();
      }
    }
    CallInfo currentCallInfo=calls[cc];
    Proto currentProto=currentCallInfo.closure.p;
    int line=getLineNumber(currentCallInfo);
    String source=DebugUtils.getSourceFileName(currentProto.source);
    if (!isStepping() && lastline == line && source.equals(lastSource)) {
      return;
    }
    if (DebugUtils.IS_DEBUG)     DebugUtils.println("String_Node_Str" + line);
    int i=currentProto.code[pc];
    int opCode=StackState.GET_OPCODE(i);
    if (isStepping() && opCode == StackState.OP_RETURN && cc == 0) {
      cancelStepping();
    }
 else     if (shouldPauseForStepping) {
      shouldPauseForStepping=false;
      suspendOnStepping();
    }
 else     if (stepping == STEP_INTO) {
      if (lastline != line) {
        suspendOnStepping();
      }
 else       if (opCode == StackState.OP_CALL) {
        shouldPauseForStepping=true;
      }
    }
 else     if (stepping == STEP_OVER) {
      if ((lastline != line && steppingFrame == cc) || (steppingFrame > cc)) {
        suspendOnStepping();
      }
    }
 else     if (stepping == STEP_RETURN) {
      if ((opCode == StackState.OP_RETURN && cc == this.steppingFrame) || (opCode == StackState.OP_TAILCALL && cc == this.steppingFrame)) {
        shouldPauseForStepping=true;
      }
    }
    if (!suspended && lastline != line) {
      if (DebugUtils.IS_DEBUG)       DebugUtils.println("String_Node_Str" + currentProto.source);
      String fileName=DebugUtils.getSourceFileName(source);
      String breakpointKey=constructBreakpointKey(fileName,line);
      if (breakpoints.containsKey(breakpointKey)) {
        if (DebugUtils.IS_DEBUG)         DebugUtils.println("String_Node_Str" + constructBreakpointKey(fileName,line));
        debugSupport.notifyDebugEvent(new DebugEventBreakpoint(fileName,line));
        suspended=true;
      }
    }
    lastline=line;
    lastSource=source;
    while (suspended && !exiting) {
      try {
        this.wait();
        if (DebugUtils.IS_DEBUG)         DebugUtils.println("String_Node_Str");
        if (lastException != null) {
          throw lastException;
        }
      }
 catch (      InterruptedException ie) {
        ie.printStackTrace();
      }
    }
  }
}

Fixed version (ground truth):
public void debugHooks(int pc){
  if (exiting) {
    throw new AbortException("String_Node_Str");
  }
  if (DebugUtils.IS_DEBUG) {
    DebugUtils.println("String_Node_Str" + pc + "String_Node_Str"+ getFileLine(cc));
    for (int j=0; j <= cc; j++) {
      DebugUtils.println("String_Node_Str" + j + "String_Node_Str"+ calls[j].base+ "String_Node_Str"+ calls[j].top+ "String_Node_Str"+ calls[j].pc);
      dumpStack(j);
    }
  }
synchronized (this) {
    while (bSuspendAtStart) {
      try {
        this.wait();
      }
 catch (      InterruptedException e) {
        e.printStackTrace();
      }
    }
    CallInfo currentCallInfo=calls[cc];
    Proto currentProto=currentCallInfo.closure.p;
    int line=getLineNumber(currentCallInfo);
    String source=DebugUtils.getSourceFileName(currentProto.source);
    if (!isStepping() && lastline == line && source.equals(lastSource)) {
      return;
    }
    if (DebugUtils.IS_DEBUG)     DebugUtils.println("String_Node_Str" + line);
    int i=currentProto.code[pc];
    int opCode=StackState.GET_OPCODE(i);
    if (isStepping() && opCode == StackState.OP_RETURN && cc == 0) {
      cancelStepping();
    }
 else     if (shouldPauseForStepping) {
      shouldPauseForStepping=false;
      suspendOnStepping();
    }
 else     if (stepping == STEP_INTO) {
      if (lastline != line) {
        suspendOnStepping();
      }
 else       if (opCode == StackState.OP_CALL) {
        shouldPauseForStepping=true;
      }
    }
 else     if (stepping == STEP_OVER) {
      if ((steppingFrame == cc && lastline != line) || (steppingFrame > cc)) {
        suspendOnStepping();
      }
    }
 else     if (stepping == STEP_RETURN) {
      if ((opCode == StackState.OP_RETURN && cc == this.steppingFrame) || (opCode == StackState.OP_TAILCALL && cc == this.steppingFrame)) {
        shouldPauseForStepping=true;
      }
    }
    if (!suspended && lastline != line) {
      if (DebugUtils.IS_DEBUG)       DebugUtils.println("String_Node_Str" + currentProto.source);
      String fileName=DebugUtils.getSourceFileName(source);
      String breakpointKey=constructBreakpointKey(fileName,line);
      if (breakpoints.containsKey(breakpointKey)) {
        if (DebugUtils.IS_DEBUG)         DebugUtils.println("String_Node_Str" + constructBreakpointKey(fileName,line));
        debugSupport.notifyDebugEvent(new DebugEventBreakpoint(fileName,line));
        suspended=true;
      }
    }
    lastline=line;
    lastSource=source;
    while (suspended && !exiting) {
      try {
        this.wait();
        if (DebugUtils.IS_DEBUG)         DebugUtils.println("String_Node_Str");
      }
 catch (      InterruptedException ie) {
        ie.printStackTrace();
      }
    }
  }
}