From b11110539a608154cdbd972e276e0726bca66fe5 Mon Sep 17 00:00:00 2001
From: Nick Fitzgerald <fitzgen@gmail.com>
Date: Wed, 26 Jul 2017 14:21:33 -0700
Subject: Report what the unknown generate item was when parsing `--generate`

---
 src/options.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/options.rs b/src/options.rs
index 23df6370..3d54eb39 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -302,9 +302,10 @@ pub fn builder_from_flags<I>
                 "methods" => config.methods = true,
                 "constructors" => config.constructors = true,
                 "destructors" => config.destructors = true,
-                _ => {
+                otherwise => {
                     return Err(Error::new(ErrorKind::Other,
-                                          "Unknown generate item"));
+                                          format!("Unknown generate item: {}",
+                                                  otherwise)));
                 }
             }
         }
-- 
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