[Bug 33069] Visual Basic 6 can't load any component

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=33069

Damjan Jovanovic <damjan.jov at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |damjan.jov at gmail.com

--- Comment #6 from Damjan Jovanovic <damjan.jov at gmail.com> ---
To reproduce this, in VB6 you go to "Project" -> "Components..." and tick one
of those boxes and click "OK", right?

If so, I get a messagebox with

"System Error &H80004001 (-2147467263)."

80004001 is E_NOTIMPL.

Attaching winedbg and getting a stack trace while the messagebox is shown
doesn't show any COM-related functions on the stack. The console output is:

---snip---
0024:fixme:ole:ITypeLib2_fnGetDocumentation2 (02271890) index -1 lcid 0 half
implemented stub!
0024:fixme:ole:ICreateTypeLib2_fnSetHelpStringContext 03288090 250000 - stub
---snip---

The function ICreateTypeLib2_fnSetHelpStringContext() in
dlls/oleaut32/typelib.c does indeed return E_NOTIMPL:

---snip---
static HRESULT WINAPI ICreateTypeLib2_fnSetHelpStringContext(ICreateTypeLib2
*iface,
        ULONG helpStringContext)
{
    ITypeLibImpl *This = impl_from_ICreateTypeLib2(iface);
    FIXME("%p %u - stub\n", This, helpStringContext);
    return E_NOTIMPL;
}
---snip---

If I hack it to return E_OUTOFMEMORY instead, does the messagebox show the new
error code?

Yes. The messagebox then prints "Out of memory" instead, so it must be coming
from there.

What if I hack it to return S_OK instead, indicating success?

It seems to proceed a little further, then gets a stack overflow and hangs:

---snip---
0024:fixme:ole:CoIsOle1Class {648a5600-2c6e-101b-82b6-000000000014}
0024:err:ole:LHashValOfNameSysA Unknown lcid 7f, treating as latin-based,
please report
(repeated many times)
0024:err:ole:LHashValOfNameSysA Unknown lcid 7f, treating as latin-based,
please report
wine: Unhandled stack overflow at address 7BC1BB10 (thread 0024), starting
debugger...
0024:err:virtual:virtual_setup_exception stack overflow 1232 bytes in thread
0024 addr 0x7bc3f60f stack 0x220b30 (0x220000-0x221000-0x320000)
---snip---

Test done with Wine 5.19

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