From 90de76359f82a2aa57ddcf670fc82e6e02909fb5 Mon Sep 17 00:00:00 2001
From: Christian <cb@256bit.org>
Date: Wed, 18 Nov 2020 09:10:22 +0100
Subject: [PATCH] highlighter: use synIDtrans() in s:hl_group_exists (legacy
 vimscript)

When checking the defined foreground color in the function that checks
whether a highlighting group exists, it should follow the syntax group
links and check the final color.
---
 autoload/airline/highlighter.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/airline/highlighter.vim b/autoload/airline/highlighter.vim
index 92b60200..f845d7db 100644
--- a/autoload/airline/highlighter.vim
+++ b/autoload/airline/highlighter.vim
@@ -88,7 +88,7 @@ if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
   function! s:hl_group_exists(group) abort " {{{2
     if !hlexists(a:group)
       return 0
-    elseif empty(synIDattr(hlID(a:group), 'fg'))
+    elseif empty(synIDattr(synIDtrans(hlID(a:group)), 'fg'))
       return 0
     endif
     return 1