Program: 12254
Project: 12254
Buggy source:
private void modifySourceStaticFieldInstructionsInTargetClass(MethodDeclaration newMethodDeclaration){
  ExpressionExtractor extractor=new ExpressionExtractor();
  List<Expression> sourceVariableInstructions=extractor.getVariableInstructions(sourceMethod.getBody());
  List<Expression> newVariableInstructions=extractor.getVariableInstructions(newMethodDeclaration.getBody());
  int i=0;
  for (  Expression expression : sourceVariableInstructions) {
    SimpleName simpleName=(SimpleName)expression;
    IBinding binding=simpleName.resolveBinding();
    if (binding.getKind() == IBinding.VARIABLE) {
      IVariableBinding variableBinding=(IVariableBinding)binding;
      if (variableBinding.isField() && (variableBinding.getModifiers() & Modifier.STATIC) != 0 && variableBinding.getDeclaringClass() != null && variableBinding.getDeclaringClass().isEqualTo(sourceTypeDeclaration.resolveBinding())) {
        AST ast=newMethodDeclaration.getAST();
        SimpleName qualifier=ast.newSimpleName(sourceTypeDeclaration.getName().getIdentifier());
        if (simpleName.getParent() instanceof FieldAccess) {
          FieldAccess fieldAccess=(FieldAccess)newVariableInstructions.get(i).getParent();
          targetRewriter.set(fieldAccess,FieldAccess.EXPRESSION_PROPERTY,qualifier,null);
        }
 else         if (!(simpleName.getParent() instanceof QualifiedName)) {
          SimpleName newSimpleName=ast.newSimpleName(simpleName.getIdentifier());
          QualifiedName newQualifiedName=ast.newQualifiedName(qualifier,newSimpleName);
          targetRewriter.replace(newVariableInstructions.get(i),newQualifiedName,null);
        }
      }
    }
    i++;
  }
}

Fixed version (ground truth):
private void modifySourceStaticFieldInstructionsInTargetClass(MethodDeclaration newMethodDeclaration){
  ExpressionExtractor extractor=new ExpressionExtractor();
  List<Expression> sourceVariableInstructions=extractor.getVariableInstructions(sourceMethod.getBody());
  List<Expression> newVariableInstructions=extractor.getVariableInstructions(newMethodDeclaration.getBody());
  int i=0;
  for (  Expression expression : sourceVariableInstructions) {
    SimpleName simpleName=(SimpleName)expression;
    IBinding binding=simpleName.resolveBinding();
    if (binding.getKind() == IBinding.VARIABLE) {
      IVariableBinding variableBinding=(IVariableBinding)binding;
      if (variableBinding.isField() && (variableBinding.getModifiers() & Modifier.STATIC) != 0 && sourceTypeDeclaration.resolveBinding().isEqualTo(variableBinding.getDeclaringClass())) {
        AST ast=newMethodDeclaration.getAST();
        SimpleName qualifier=ast.newSimpleName(sourceTypeDeclaration.getName().getIdentifier());
        if (simpleName.getParent() instanceof FieldAccess) {
          FieldAccess fieldAccess=(FieldAccess)newVariableInstructions.get(i).getParent();
          targetRewriter.set(fieldAccess,FieldAccess.EXPRESSION_PROPERTY,qualifier,null);
        }
 else         if (!(simpleName.getParent() instanceof QualifiedName)) {
          SimpleName newSimpleName=ast.newSimpleName(simpleName.getIdentifier());
          QualifiedName newQualifiedName=ast.newQualifiedName(qualifier,newSimpleName);
          targetRewriter.replace(newVariableInstructions.get(i),newQualifiedName,null);
        }
      }
    }
    i++;
  }
}