core.exception.InvalidMemoryOperationError@(0) on File Reading.

[David DeWitt via Digitalmars-d-learn]

I am getting an core.exception.InvalidMemoryOperationError@(0)
     auto recs = f  // Open for reading
                           .byLineCopy();
                           .array;  //Here is where is appears to 
be happening.

I have narrowed it down to the .array.  I am wondering if there 
is some common issue I may be experiencing or if there is a 
better solution?

Here is what I am overall trying to achieve.

     auto recs = f  // Open for reading
                           .byLineCopy;
                           .array();
                           .map!(a=> 
assocArray(zip(h1.fullHeader, splitter(a,','))))
                           .map!(a=>a.byKeyValue()
                                    
.filter!(a=>h1.filteredHeader.canFind(a.key)));

        foreach(item;recs){
                           auto item = Json.emptyObject;
                           each!((k)=> item[k.key] = 
k.value)(item);
                           insert(item, dateIndex); 
//ElasticSearch
        }

Also any suggestions on the code are greatly appreciated :)