From 0d4c7ec0721734bfa532007faaef9ca357eea371 Mon Sep 17 00:00:00 2001
From: Guanqun Lu <guanqun.lu@gmail.com>
Date: Tue, 17 Dec 2019 14:20:08 +0800
Subject: [PATCH] add a debug_assert according to the comment

---
 clippy_lints/src/methods/map_unwrap_or.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clippy_lints/src/methods/map_unwrap_or.rs b/clippy_lints/src/methods/map_unwrap_or.rs
index 7a19ac42e5ed..c90fba815e71 100644
--- a/clippy_lints/src/methods/map_unwrap_or.rs
+++ b/clippy_lints/src/methods/map_unwrap_or.rs
@@ -61,6 +61,7 @@ pub(super) fn lint<'a, 'tcx>(
                 arg, suggest
             )
         } else {
+            debug_assert!(is_result);
             "called `map(f).unwrap_or(a)` on a Result value. \
              This can be done more directly by calling `map_or(a, f)` instead"
                 .to_string()