[Bug 48776] New: GoToMeeting Opener crashes

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48776

Bug ID: 48776
           Summary: GoToMeeting Opener crashes
           Product: Wine
           Version: 5.4
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wininet
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Tried to get a goto meeting running just with an older Firefox and Wine.
Unfortunately the "GoToMeeting Opener.exe" crashes short after start,
when showing around 10% progress.

I could follow the crash to an allocation of 0x100000 bytes,
to which some data get asynchronously downloaded, written to a file,
and then freed.
But after that, below a INTERNET_WorkerThreadFunc,
a memcpy tries to access the previously freed memory.

Further looking might lead to a SetEvent that get triggered by
the INTERNET_STATUS_RECEIVING_RESPONSE callback,
but I am not sure if this is related or supposed the way it runs now.

A windows Firefox offers for following link a download:
https://global.gotomeeting.com/join/100000000
(meeting id changed - the download is the same
except 176 bytes, but shows the same issue.)