From 5f1aec5abdb551e5f3035ca054d36580b3233efb Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Wed, 25 Dec 2019 13:02:23 +0100
Subject: [PATCH] Fix scripts/vim-patch.sh for Bash 4.3

Ref: https://github.com/neovim/neovim/pull/11514#issuecomment-568780231
---
 scripts/vim-patch.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index 483264415e..b5806311c9 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -399,9 +399,11 @@ declare -A tokens
 declare -A vim_commit_tags
 
 _set_tokens_and_tags() {
+  set +u  # Avoid "unbound variable" with bash < 4.4 below.
   if [[ -n "${tokens[*]}" ]]; then
     return
   fi
+  set -u
 
   # Find all "vim-patch:xxx" tokens in the Nvim git log.
   for token in $(list_vimpatch_tokens); do