[Bug 40866] New: DigitalMicrograph: crashes when a new script is added to the menu

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40866

            Bug ID: 40866
           Summary: DigitalMicrograph: crashes when a new script is added
                    to the menu
           Product: Wine
           Version: 1.9.13
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs at winehq.org
          Reporter: niermann at physik.tu-berlin.de
      Distribution: ---

Created attachment 54885
  --> https://bugs.winehq.org/attachment.cgi?id=54885
Wine output during crash

DigitalMicrograph by Gatan crashes when the "Install Script" dialog is closed.
Independently of whether the dialog is opened via the "File->Install Script" or
the "File->Install Script File" command.

To reproduce: Create new script (File->New Script) and try to install it
(File->Install Script). In the "Install script" dialog simply press Enter
without changing anything.

Bug occurs on DigitalMicrograph versions 1.8.3 and 2.3.0 (others not tested)
and with wine 1.6.2 and wine-1.9.13 (others not tested).

>From tracing the outputs and by debugging wine I found the reason for the crash
to be in dlls/user32/edit.c: The application calls EM_GETHANDLE and later
WM_SETFONT on an edit control (without sending EM_SETHANDLE in between). During
processing WM_SETFONT the es->text field is accessed, which at this point
contains NULL due to the inhibited buffer locking after EM_GETHANDLE.

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