Any[] and Any[][] arguments are invalidated

[9il]

Any[] / Any[][] are copies of XLOPER12 structures, which was freed using xlFree (is important in case of strings such as NAN).

[9il]

The following two functions cause the bug:

T fromXlOper(T, A)(LPXLOPER12 oper, ref A allocator) if(is(T == Any)) {
    // FIXME: deep copy
    return Any(*oper);
}

// apply a function to an oper of type xltypeMulti
// the function must take a boolean value indicating if the cell value
// is to be converted or not, and a reference to the cell value itself
package void apply(T, alias F)(ref XLOPER12 oper) {
    import xlld.xlcall: XlType;
    import xlld.xl: coerce, free;
    import xlld.wrap: dlangToXlOperType, isMulti, numOperStringBytes;
    import xlld.any: Any;
    version(unittest) import xlld.test_util: gNumXlCoerce, gNumXlFree;

    if(!isMulti(oper))
        throw applyTypeException;

    const rows = oper.val.array.rows;
    const cols = oper.val.array.columns;
    auto values = oper.val.array.lparray[0 .. (rows * cols)];

    foreach(const row; 0 .. rows) {
        foreach(const col; 0 .. cols) {

            auto cellVal = coerce(&values[row * cols + col]);

            // Issue 22's unittest ends up coercing more than test_util can handle
            // so we undo the side-effect here
            version(unittest) --gNumXlCoerce; // ignore this for testing

            scope(exit) {
////////////////////////////////////////////////////////////////////
                free(&cellVal); //////////////  <---  THIS!!!!
////////////////////////////////////////////////////////////////////
                // see comment above about gNumXlCoerce
                version(unittest) --gNumXlFree;
            }

            // try to convert doubles to string if trying to convert everything to an
            // array of strings
            const shouldConvert =
                (cellVal.xltype == dlangToXlOperType!T.Type) ||
                (cellVal.xltype == XlType.xltypeNum && dlangToXlOperType!T.Type == XlType.xltypeStr) ||
                is(T == Any);

            F(shouldConvert, row, col, cellVal);
        }
    }
}

[atilaneves]

Fixed by this PR.