Incomplete clearing of the preview window in the presence of combining Unicode characters

[vejkse]

• I have read through the manual page (man fzf)
• I have the latest version of fzf
• I have searched through the existing issues

Info

• OS
  • Linux
  • Mac OS X
  • Windows
  • Etc.
• Shell
  • bash
  • zsh
  • fish

Problem / Steps to reproduce

Here’s the content of a very small text file, let’s call it combining_unicode.txt, where the « ă » is an « a » followed by a combining breve (U+0306):

xyz
ăb
uvw
ab

If I do cat combining_unicode.txt | fzf --preview='echo {}', and move up in the list from xyz to ăb (or type a, so that xyz is filtered out), the preview window shows ăbz instead of ab, the z being the remains of xyz incompletely cleared from the screen. No such problem arises further up when moving from uvw to ab.

This may be related to #1526.

[junegunn]

While 69dffd7 is not a proper fix to the problem, it fixes this particular case. Please let me know if you run into another similar issue.

[vejkse]

Thank you! It works apparently perfectly.