AddHostObjectToScript throws exception when passing large SafeArray

Description

Hi,

I am trying to pass a file's content from C++ to a JavaScript App.

I am using the AddHostObjectToScript to transfer a SafeArray wrapped in a VARIANT.
(As described here: https://docs.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2?view=webview2-1.0.664.37#addhostobjecttoscript)

It works fine with small files but AddHostObjectToScript throws an exception for all filesizes larger than approximatley 50MB.

This is my code:

std::ifstream input(filePath, std::ios::binary);

if (!input.good())
    return E_FAIL;
                
SAFEARRAYBOUND saBound;
saBound.lLbound = 0;
saBound.cElements = fileSize;
SAFEARRAY* safeArray = SafeArrayCreate(VT_UI1, 1, &saBound);

if (safeArray) {
    HRESULT hr = SafeArrayLock(safeArray);
    if (SUCCEEDED(hr))
    {
        char* pData = static_cast<char*>(safeArray->pvData);

        input.read(pData, fileSize);
    }
    SafeArrayUnlock(safeArray);
} else {
    return E_FAIL;
}

input.close();

VARIANT remoteObjectAsVariant = {};
remoteObjectAsVariant.parray = safeArray;
remoteObjectAsVariant.vt = VT_ARRAY | VT_UI1;

HRESULT hr = S_OK;
try {
    hr = m_contentWebView->AddHostObjectToScript(L"myDataArray", &remoteObjectAsVariant);
} catch (...) {
    std::cout << "Caught exception";
}
hr = GetLastError();

This is the exception:

Exception thrown at 0x7725A892 in WebviewDesktopApp.exe: Microsoft C++ exception: std::bad_alloc at memory location 0x00CFED54.
Debug Error!

GetLastError() returns 0x00000008 Not enough memory resources are available to process this command.

Version
SDK: 1.0.622.22
Runtime: Version 87.0.664.66 (Official build) (64-bit)
Framework: Win32
OS: Win10 19041

Repro Steps
I hope the code is enough to reproduce the issue.

AB#44875951

Start with the AddHostObjectToScript call and the SafeArray construction shown in the issue, then reproduce the failure with files above and below the reported size. Check the WebView2 host-object documentation and determine whether large SafeArrays are expected to work or have a documented limit; done means the behavior or limitation is confirmed with a reproducible result.