Program: 147290
Project: 147290
Buggy source:
@Override public Conditional<Instruction> execute(FeatureExpr ctx,final ThreadInfo ti){
  final StackFrame frame=ti.getModifiableTopFrame();
  Conditional<Integer> objRef=frame.peek(ctx);
  lastThis=objRef;
  final GETFIELD thisInstruction=this;
  pushCTX=ctx;
  Conditional<Instruction> next=objRef.mapf(ctx,new BiFunction<FeatureExpr,Integer,Conditional<Instruction>>(){
    @Override public Conditional<Instruction> apply(    FeatureExpr ctx,    Integer objRef){
      if (objRef == MJIEnv.NULL) {
        pushCTX=pushCTX.andNot(ctx);
        return new One<>(ti.createAndThrowException(ctx,"String_Node_Str","String_Node_Str" + fname + "String_Node_Str"));
      }
      ElementInfo ei=ti.getElementInfoWithUpdatedSharedness(objRef);
      FieldInfo fi=getFieldInfo(ctx);
      if (fi == null) {
        pushCTX=pushCTX.andNot(ctx);
        return new One<>(ti.createAndThrowException(ctx,"String_Node_Str","String_Node_Str" + fname + "String_Node_Str"+ ei));
      }
      if (isNewPorFieldBoundary(ti,fi,objRef)) {
        if (createAndSetSharedFieldAccessCG(ei,ti)) {
          pushCTX=pushCTX.andNot(ctx);
          return new One<Instruction>(thisInstruction);
        }
      }
      return (Conditional<Instruction>)One.NULL;
    }
  }
);
  if (Conditional.isContradiction(pushCTX)) {
    return next;
  }
  frame.pop(pushCTX,1);
  next=ChoiceFactory.create(pushCTX,objRef.mapf(ctx,new BiFunction<FeatureExpr,Integer,Conditional<Instruction>>(){
    @Override public Conditional<Instruction> apply(    FeatureExpr ctx,    Integer objRef){
      ElementInfo ei=ti.getElementInfoWithUpdatedSharedness(objRef);
      attr=ei.getFieldAttr(fi);
      if (fi.getStorageSize() == 1) {
        pushValue=ChoiceFactory.create(ctx,ei.get1SlotField(fi),pushValue);
      }
 else {
        pushValue=ChoiceFactory.create(ctx,ei.get2SlotField(fi),pushValue);
      }
      return getNext(ctx,ti);
    }
  }
),next);
  if (fi.isReference()) {
    frame.pushRef(pushCTX,pushValue);
  }
 else {
    frame.push(pushCTX,pushValue);
  }
  if (size == 1) {
    if (attr != null) {
      frame.setOperandAttr(attr);
    }
  }
 else {
    if (attr != null) {
      frame.setLongOperandAttr(attr);
    }
  }
  return next;
}

Fixed version (ground truth):
@Override public Conditional<Instruction> execute(FeatureExpr ctx,final ThreadInfo ti){
  pushValue=One.valueOf(0);
  final StackFrame frame=ti.getModifiableTopFrame();
  Conditional<Integer> objRef=frame.peek(ctx);
  lastThis=objRef;
  final GETFIELD thisInstruction=this;
  pushCTX=ctx;
  Conditional<Instruction> next=objRef.mapf(ctx,new BiFunction<FeatureExpr,Integer,Conditional<Instruction>>(){
    @Override public Conditional<Instruction> apply(    FeatureExpr ctx,    Integer objRef){
      if (objRef == MJIEnv.NULL) {
        pushCTX=pushCTX.andNot(ctx);
        return new One<>(ti.createAndThrowException(ctx,"String_Node_Str","String_Node_Str" + fname + "String_Node_Str"));
      }
      ElementInfo ei=ti.getElementInfoWithUpdatedSharedness(objRef);
      FieldInfo fi=getFieldInfo(ctx);
      if (fi == null) {
        pushCTX=pushCTX.andNot(ctx);
        return new One<>(ti.createAndThrowException(ctx,"String_Node_Str","String_Node_Str" + fname + "String_Node_Str"+ ei));
      }
      if (isNewPorFieldBoundary(ti,fi,objRef)) {
        if (createAndSetSharedFieldAccessCG(ei,ti)) {
          pushCTX=pushCTX.andNot(ctx);
          return new One<Instruction>(thisInstruction);
        }
      }
      return (Conditional<Instruction>)One.NULL;
    }
  }
);
  if (Conditional.isContradiction(pushCTX)) {
    return next;
  }
  frame.pop(pushCTX,1);
  next=ChoiceFactory.create(pushCTX,objRef.mapf(ctx,new BiFunction<FeatureExpr,Integer,Conditional<Instruction>>(){
    @Override public Conditional<Instruction> apply(    FeatureExpr ctx,    Integer objRef){
      ElementInfo ei=ti.getElementInfoWithUpdatedSharedness(objRef);
      attr=ei.getFieldAttr(fi);
      if (fi.getStorageSize() == 1) {
        pushValue=ChoiceFactory.create(ctx,ei.get1SlotField(fi),pushValue);
      }
 else {
        pushValue=ChoiceFactory.create(ctx,ei.get2SlotField(fi),pushValue);
      }
      return getNext(ctx,ti);
    }
  }
),next);
  if (fi.isReference()) {
    frame.pushRef(pushCTX,pushValue);
  }
 else {
    frame.push(pushCTX,pushValue);
  }
  if (size == 1) {
    if (attr != null) {
      frame.setOperandAttr(attr);
    }
  }
 else {
    if (attr != null) {
      frame.setLongOperandAttr(attr);
    }
  }
  return next;
}