From 5eea30ca7a15a513fdc99a065efdfb2f43354658 Mon Sep 17 00:00:00 2001
From: Martin Geisler <martin@geisler.net>
Date: Sun, 8 Apr 2018 22:17:52 +0200
Subject: [PATCH] lib: add minimal test for #129

---
 README.md  | 2 ++
 src/lib.rs | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/README.md b/README.md
index 07b390bd..83ff31d3 100644
--- a/README.md
+++ b/README.md
@@ -191,6 +191,7 @@ Issues closed:
 * Fixed [#99][issue-99]: Word broken even though it would fit on line.
 * Fixed [#107][issue-107]: Automatic hyphenation is off by one.
 * Fixed [#122][issue-122]: Take newlines into account when wrapping.
+* Fixed [#129][issue-129]: Panic on string with em-dash.
 
 ### Version 0.9.0 — October 5th, 2017
 
@@ -335,4 +336,5 @@ Contributions will be accepted under the same license.
 [issue-101]: https://github.com/mgeisler/textwrap/issues/101
 [issue-107]: https://github.com/mgeisler/textwrap/issues/107
 [issue-122]: https://github.com/mgeisler/textwrap/issues/122
+[issue-129]: https://github.com/mgeisler/textwrap/issues/129
 [mit]: LICENSE
diff --git a/src/lib.rs b/src/lib.rs
index 7f610ae6..dc08f215 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1007,6 +1007,13 @@ mod tests {
                    vec!["aaabbbccc", "x", "yyyzzzwww"]);
     }
 
+    #[test]
+    fn issue_129() {
+        // The dash is an em-dash which takes up four bytes. We used
+        // to panic since we tried to index into the character.
+        assert_eq!(wrap("x – x", 1), vec!["x", "–", "x"]);
+    }
+
     #[test]
     fn wide_character_handling() {
         assert_eq!(wrap("Hello, World!", 15), vec!["Hello, World!"]);