[Bug 60297] New: Netscape Communicator 4.08 for Windows 3.1 crashes on start with "invalid float operation"

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60297

            Bug ID: 60297
           Summary: Netscape Communicator 4.08 for Windows 3.1 crashes on
                    start with "invalid float operation"
           Product: Wine
           Version: 11.17
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Created attachment 82045
  --> http://bugs.winehq.org/attachment.cgi?id=82045
WINEDEBUG=+int

Steps to reproduce:

1. Use Wine 11.17 or later to avoid Bug 60229

2. Use a 32-bit-only Wine or "old WoW64" Wine because the installer won't start
on new WoW64

3. Run `wine cc16d408.exe` to install Netscape

4. Run `wineserver -k` to close the 36 file explorer windows that Wine opens

5. Run `wine 'C:\Netscape\Comm\Program\NETSCAPE.EXE'` to start Netscape

Netscape calls __fpMath in win87em.dll with bx=4 (set control word) and
ax=0x133f (value of control word) to mask all floating-point exceptions (bits
0-5). Netscape depends on those exceptions being masked, but Wine's win87em.dll
unmasks invalid operation exceptions (bit 0) and denormal operand exceptions
(bit 1).

First reported at https://github.com/otya128/winevdm/pull/894

$ sha256sum cc16d408.exe
184e57f82946fb317da45b8b2f5fa10da7310ece1e502fe925712297730a9b86

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[Bug 60297] Netscape Communicator 4.08 for Windows 3.1 crashes on start with "invalid float operation"

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60297

Alex Henrie <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://winworldpc.com/down
                   |                            |load/04446a90-c8b2-11ec-b93
                   |                            |1-0200008a0da4
           Keywords|                            |download, win16

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