https://bugs.documentfoundation.org/show_bug.cgi?id=166943

            Bug ID: 166943
           Summary: EDITING: Crash on alt+X use on lone combining
                    diacritical mark
           Product: LibreOffice
           Version: 25.2.4.3 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: minor
          Priority: medium
         Component: Writer
          Assignee: [email protected]
          Reporter: [email protected]

Using alt+X to retrieve the Unicode code point for (probably) any empty
combining diacritical mark (U+0300–U+036F; alt codes 770–879) crashes LO Writer
on Windows 10.

To reproduce:
1. Write "U+0300" in an empty document
2. Press alt+X
3. Press alt+X

Actual results:
The text is converted to a combining diacritical mark in step 2. In step 3,
Writer immediately freezes and crashes shortly after.

Expected results:
"U+0300" is converted to a combining diacritical mark in step 2. The mark is
reverted to "U+0300" in step 3.

Version: 25.2.4.3
Build ID: 33e196637044ead23f5c3226cde09b47731f7e27
OS: Windows 10

Crash type: Write access violation

Comment:
Shouldn't the error be caught instead of the entire thing crashing? I don't
know how computer applications are coded but to me it feels like there could
just be an "unknown error" popup with the choice to keep editing instead of
restarting the program. In web development class we just let the client side
ignore errors whenever possible and send them to us. Maybe that's only in high
school.

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