https://bugs.documentfoundation.org/show_bug.cgi?id=149476

            Bug ID: 149476
           Summary: dragging text in formula bar causes graphical artifact
           Product: LibreOffice
           Version: 7.4.0.0 alpha0+ Master
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 180621
  --> https://bugs.documentfoundation.org/attachment.cgi?id=180621&action=edit
test file

Windows 10 only...
Compiled with VS2019 16.11.15 and cygwin

When dragging a selected text in the Calc formula bar, the text cursor is not
well managed and we have some graphic artifacts.

Disable lto compilation option in autogen.sh command solves the bug.
It occurs with old LibreOffice version too.

It seems independant from the hardware, it happens on intel UHD graphics, Vega
8, Radeon and in Virtualbox. Disable SKIA has no effect.

To reproduce
- Enter some text in a cell, multiline text is the best
- go to formula bar, your text is displayed in it too.
- select text with left mouse button
- when text is selected, move mouse cursor on it, press left mouse button and
begin to drag the text 

Expected  : text cursor follows mouse cursor without artifact
Effect observed : some black rectangles where cursor is moving.. See video

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