From e4352f98bb41c80b5a5c9892faf3998f53863868 Mon Sep 17 00:00:00 2001
From: Daniel Shahaf <danielsh@apache.org>
Date: Sun, 5 Nov 2017 15:58:58 +0000
Subject: [PATCH] driver: Revert previous commit, unbreaking the build on
 zsh<5.0.8.

---
 zsh-syntax-highlighting.zsh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
index d1470b8..e4e44fa 100644
--- a/zsh-syntax-highlighting.zsh
+++ b/zsh-syntax-highlighting.zsh
@@ -188,7 +188,11 @@ _zsh_highlight_apply_zle_highlight() {
   integer first="$3" second="$4"
 
   # read the relevant entry from zle_highlight
-  local region="${zle_highlight[(r)${(b)entry}:*]-}"
+  #
+  # ### In zsh≥5.0.8 we'd use ${(b)entry}, but we support older zsh's, so we don't
+  # ### add (b).  The only effect is on the failure mode for callers that violate
+  # ### the precondition.
+  local region="${zle_highlight[(r)${entry}:*]-}"
 
   if [[ -z "$region" ]]; then
     # entry not specified at all, use default value