[Bug 43197] New: 5Plus: regression: Print dialog crashes with illegal floating point operation

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43197

            Bug ID: 43197
           Summary: 5Plus: regression: Print dialog crashes with illegal
                    floating point operation
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs at winehq.org
          Reporter: felix.huber at schyf.de
      Distribution: ---

5Plus (a German school credits and report program) crashes with lately versions
of wine when trying to print a report. A pop-up with "Unzulässige
Gleitkommaoperation" (illegal floating point operation) occurs and the print
cancel button doesn't react anymore. Interestingly, the menu bar gets corrupted
with the first letters missing the left half.

The regression occurs here:

commit a60144ee74e1db170f04edeb8cfd3a5a17d36d46
Author: Huw Davies <huw at codeweavers.com>
Date:   Thu Jan 26 09:30:20 2017 +0000

    user32: Disable cached DCs once they are released.

    Signed-off-by: Huw Davies <huw at codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard at winehq.org>

:040000 040000 e4b9b15bea9e9ba5c5e59a9bc1711793f8ef38db
82429bb454753e5dd76e396abababde24e0db498 M      dlls

The error is in dlls/user32/painting.c 
static INT release_dc( HWND hwnd, HDC hdc, BOOL end_paint )
     {
         if (!(dce->flags & DCX_NORESETATTRS)) SetHookFlags( dce->hdc,
DCHF_RESETDC );
         if (end_paint || (dce->flags & DCX_CACHE)) delete_clip_rgn( dce );
         if (dce->flags & DCX_CACHE)
         {
             dce->count = 0;
             SetHookFlags( dce->hdc, DCHF_DISABLEDC );
         }
         ret = TRUE;
     }

Commenting out SetHookFlags() bings back normal behaviour.

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