[Bug 48142] New: shell32:appbar tests fail on some Windows 10 machines

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48142

Bug ID: 48142
           Summary: shell32:appbar tests fail on some Windows 10 machines
           Product: Wine
           Version: 4.20
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: shell32
          Assignee: [e-mail]
          Reporter: [e-mail]

https://test.winehq.org/data/tests/shell32:appbar.html

Some of the "cw" win10 machines fail in shell32:appbar. Mine happens to work
when running the test on its own. I haven't been able to find a pattern, other
than that none of the machines are on the current build.

Without a machine that can reproduce this, I don't see a way to figure out
what's going on.

It would seem based on the results that appbar functionality does not work at
all.

One possibility is that a previous test leaves explorer in a bad state. If so,
running the test on its own should succeed. It would also explain the
correlation between failures here and in shell32:systray
https://test.winehq.org/data/a9c4b309f6af82b624604bd0df898ad88d59ab5a/index_...