From bdca31c3fd5a6ccfa06c2d220a447bc14759f600 Mon Sep 17 00:00:00 2001
From: Matteo Cypriani <mcy@lm7.fr>
Date: Thu, 22 Dec 2016 14:10:53 -0500
Subject: [PATCH] main: fix bad usage error handling

---
 src/main.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 8d75d3d..f8b7fbf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -55,8 +55,11 @@ fn main_main() -> i32 {
                  "print this help message");
 
     let options = match opts.parse(&args[1..]) {
-        Ok(m) => m,
-        Err(err) => panic!(err),
+        Ok(options) => options,
+        Err(_) => {
+            print_usage(&prog_name, &opts);
+            return 1;
+        },
     };
 
     if options.opt_present("help") {