From: Oliver Middleton <olliemail27@gmail.com>
Date: Fri, 4 Nov 2016 18:47:32 +0000 (+0000)
Subject: Remove recursive call from Cow::to_mut
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=775d399da84776bfd8ae09af5f402874372e299c;p=rust.git

Remove recursive call from Cow::to_mut

It seems to prevent it from being inlined.
---

diff --git a/src/libcollections/borrow.rs b/src/libcollections/borrow.rs
index 8f9c3578337..30286fb243c 100644
--- a/src/libcollections/borrow.rs
+++ b/src/libcollections/borrow.rs
@@ -159,7 +159,10 @@ pub fn to_mut(&mut self) -> &mut <B as ToOwned>::Owned {
         match *self {
             Borrowed(borrowed) => {
                 *self = Owned(borrowed.to_owned());
-                self.to_mut()
+                match *self {
+                    Borrowed(..) => unreachable!(),
+                    Owned(ref mut owned) => owned,
+                }
             }
             Owned(ref mut owned) => owned,
         }