driver: Make sure we don't change the return value in a called function.

danielshahaf · danielshahaf · commit b8c93afd3438 · 2020-03-29T20:45:46.000Z
diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
@@ -72,7 +72,7 @@ typeset -ga ZSH_HIGHLIGHT_HIGHLIGHTERS
 _zsh_highlight()
 {
   # Store the previous command return code to restore it whatever happens.
-  local ret=$?
+  readonly ret=$?
 
   # Remove all highlighting in isearch, so that only the underlining done by zsh itself remains.
   # For details see FAQ entry 'Why does syntax highlighting not work while searching history?'.

Original file line number	Diff line number	Diff line change
`@@ -72,7 +72,7 @@ typeset -ga ZSH_HIGHLIGHT_HIGHLIGHTERS`
`72`	`72`	`_zsh_highlight()`
`73`	`73`	`{`
`74`	`74`	`# Store the previous command return code to restore it whatever happens.`
`75`		`- local ret=$?`
	`75`	`+ readonly ret=$?`
`76`	`76`
`77`	`77`	`# Remove all highlighting in isearch, so that only the underlining done by zsh itself remains.`
`78`	`78`	`# For details see FAQ entry 'Why does syntax highlighting not work while searching history?'.`