[Bug 41040] New: VariantChangeTypeEx lead to error when casting IUnknown( nil) -> IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Bug ID: 41040
           Summary: VariantChangeTypeEx lead to error when casting
                    IUnknown(nil) -> IDispatch
           Product: Wine
           Version: 1.9.3
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: oleaut32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Sample Delphi code, works well on Windows

var
  unk: IUnknown;
  V: Variant;
begin
  unk := nil;
  V := VarAsType(unk, varDispatch); // type error here in wine
end;

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

--- Comment #1 from Nikolay Sivov  ---
Hi, Dmitry.

Could you attach a compiled binary for this test?

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

--- Comment #2 from Dmitry Alexeev  ---
Created attachment 55215
  --> https://bugs.winehq.org/attachment.cgi?id=55215
Simple comandline app crashes on this error

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Nikolay Sivov  ---
Yes, I think I see what's going on. By the way, on successful run I shouldn't
expect any output at all right?

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

--- Comment #4 from Dmitry Alexeev  ---
Yes, empty output or crash on error.

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

--- Comment #5 from Nikolay Sivov  ---
I sent a fix for that,
https://www.winehq.org/pipermail/wine-patches/2016-August/152961.html.

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |download

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
      Fixed by SHA1|                            |806ea12766849660a4cfa20e189
                   |                            |b6d96ba8f2891
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Nikolay Sivov  ---
Fixed with
http://source.winehq.org/git/wine.git/?a=commit;h=806ea12766849660a4cfa20e18...,
please test.

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Alexandre Julliard  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #7 from Alexandre Julliard  ---
Closing bugs fixed in 1.9.16.

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Michael Stefaniuc  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
   Target Milestone|---                         |1.8.x

[Bug 41040] VariantChangeTypeEx lead to error when casting IUnknown(nil) - > IDispatch

https://bugs.winehq.org/show_bug.cgi?id=41040

Michael Stefaniuc  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|1.8.x                       |---

--- Comment #8 from Michael Stefaniuc  ---
Removing 1.8.x milestone from bugs included in 1.8.5.