Lines not flushed correctly in presence of emoji

[postsolar]

• 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

There's #2482 which was closed more than 2 years ago but I'm having a very similar issue on 0.45 (devel):

If I pass a list of lines containing emoji characters to fzf, last characters of some lines would "stick" to their position and won't get cleared after scrolling a line.

Terminal: foot version: 1.16.2-8-gca46edfe (Nov 10 2023, branch 'master') +pgo +ime +graphemes -assertions, although it also happens in alacritty, contour, kitty, urxvt, wayst and wezterm.

To reproduce:
Just get a list of emojis and their description, the one from #2482 works too.

curl -s https://raw.githubusercontent.com/LukeSmithxyz/voidrice/master/.local/share/larbs/emoji | FZF_DEFAULT_OPTS= fzf

Simply scroll up / down.

[junegunn]

Possibly related: mattn/go-runewidth#59

[junegunn]

This fixes the issue.

diff --git a/go.mod b/go.mod
index ca3ebb9..4748c33 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,8 @@ require (
 	golang.org/x/term v0.15.0
 )
 
+replace github.com/mattn/go-runewidth => github.com/rivo/go-runewidth v0.0.5-0.20220930163941-bb452aeec220
+
 require (
 	github.com/gdamore/encoding v1.0.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
diff --git a/go.sum b/go.sum
index d9bb109..30e1525 100644
--- a/go.sum
+++ b/go.sum
@@ -10,6 +10,8 @@ github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWV
 github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
 github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
+github.com/rivo/go-runewidth v0.0.5-0.20220930163941-bb452aeec220 h1:VZj/fDMXzsgaTZoTXENEis7i6S21rEHd5G1bdX7FG0M=
+github.com/rivo/go-runewidth v0.0.5-0.20220930163941-bb452aeec220/go.mod h1:bAEBv7vCrBnXArQn+ye99OGTAUaZLSEzHQNPaQ/k2w0=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
 github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=

[marcinmdev]

ibhagwan/fzf-lua#1417

Possibly related?