New subject: [Bug 53867] vbscript fails to retrieve property array by index

2 Nov 2022


      https://bugs.winehq.org/show_bug.cgi?id=53867
Bug ID: 53867
           Summary: vbscript fails to retrieve property array by index
           Product: Wine
           Version: 7.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: vbscript
          Assignee: wine-bugs@winehq.org
          Reporter: jsm174@gmail.com
      Distribution: ---
Given the following vbscript, access to aObj.ModIn(x) and aObj.ModOut(x) fail:
dim RubbersD : Set RubbersD = new Dampener   
RubbersD.addpoint 0, 0, 1.1
RubbersD.addpoint 1, 3.77, 0.97
RubbersD.addpoint 2, 5.76, 0.967 
RubbersD.addpoint 3, 15.84, 0.874
RubbersD.addpoint 4, 56, 0.64
dim SleevesD : Set SleevesD = new Dampener 
SleevesD.CopyCoef RubbersD, 0.85
Class Dampener
    Public ModIn, ModOut
    Private Sub Class_Initialize : redim ModIn(5) : redim Modout(5): End Sub
Public Sub AddPoint(aIdx, aX, aY) 
        ModIn(aIdx) = aX
        ModOut(aIdx) = aY 
    End Sub
Public Sub CopyCoef(aObj, aCoef) 
        dim x : for x = 0 to uBound(aObj.ModIn)
           addpoint x, aObj.ModIn(x), aObj.ModOut(x)*aCoef
        Next
    End Sub
End Class
It seems invoke_variant_prop in vbdisp.c has specific code that looks to see if
there is an argument, and if so fails.
I've added a block that only fails if there are arguments and the variant is
not an ARRAY. I lifted the code from array_access in interp.c. Unfortunately
array_access is not available to vbdisp.c:
static HRESULT invoke_variant_prop(script_ctx_t *ctx, VARIANT *v, WORD flags,
DISPPARAMS *dp, VARIANT *res)
{
    HRESULT hres;
switch(flags) {
    case DISPATCH_PROPERTYGET|DISPATCH_METHOD:
    case DISPATCH_PROPERTYGET:
        if(dp->cArgs) {
            if (V_ISARRAY(v)) {
                SAFEARRAY *array = V_ARRAY(v);
unsigned i, argc = arg_cnt(dp);
                LONG *indices;
if(!array) {
                    FIXME("NULL array\n");
                    return E_FAIL;
                }
            .
            .
            .
            else {
                WARN("called with arguments\n");
                return DISP_E_MEMBERNOTFOUND; /* That's what tests show */
            }
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[Bug 53867] New: vbscript fails to retrieve property array by index