From 0b510641d3a4c4db54fed5b49fe923b1482c8ab4 Mon Sep 17 00:00:00 2001
From: Barosl Lee <vcs@barosl.com>
Date: Thu, 12 Nov 2015 18:05:45 +0900
Subject: [PATCH] Improve the detailed error message for E0432

The command-line error message for E0432 does mention the possibility of
missing the `extern crate` declaration, but the detailed error message
for it doesn't.

Fixes #29517.
---
 src/librustc_resolve/diagnostics.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/librustc_resolve/diagnostics.rs b/src/librustc_resolve/diagnostics.rs
index 4147f2bea4850..6ce70ecdd5522 100644
--- a/src/librustc_resolve/diagnostics.rs
+++ b/src/librustc_resolve/diagnostics.rs
@@ -806,6 +806,15 @@ mod something {
     pub struct Foo;
 }
 ```
+
+Or, if you tried to use a module from an external crate, you may have missed
+the `extern crate` declaration:
+
+```
+extern crate homura; // Required to use the `homura` crate
+
+use homura::Madoka;
+```
 "##,
 
 E0433: r##"