From 0515ed976cb36e24b845d5897c16c602fc8ea813 Mon Sep 17 00:00:00 2001
From: Jonathan Turner <jonathan.d.turner@gmail.com>
Date: Mon, 9 Dec 2019 05:36:24 +1300
Subject: [PATCH] Fix panic

---
 src/shell/completer.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/shell/completer.rs b/src/shell/completer.rs
index c40b67d86..fac2af1c4 100644
--- a/src/shell/completer.rs
+++ b/src/shell/completer.rs
@@ -32,7 +32,7 @@ impl NuCompleter {
         let mut completions;
 
         // See if we're a flag
-        if pos > 0 && line_chars[replace_pos] == '-' {
+        if pos > 0 && replace_pos < line_chars.len() && line_chars[replace_pos] == '-' {
             completions = self.get_matching_arguments(&line_chars, line, replace_pos, pos);
         } else {
             completions = self.file_completer.complete(line, pos, context)?.1;