From 08e95a87b84aad8051ea806c963d089effaf0a7f Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@gmail.com>
Date: Tue, 1 Apr 2014 20:16:59 +0000
Subject: [PATCH 1/2] Vec::reserve_exact should not shrink

reserve_exact should not shrink according to documentation.
---
 src/libstd/vec.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstd/vec.rs b/src/libstd/vec.rs
index 5e42aaecbb93c..4dd1b5d08c0b9 100644
--- a/src/libstd/vec.rs
+++ b/src/libstd/vec.rs
@@ -447,7 +447,7 @@ impl<T> Vec<T> {
     /// assert_eq!(vec.capacity(), 11);
     /// ```
     pub fn reserve_exact(&mut self, capacity: uint) {
-        if capacity >= self.len {
+        if capacity > self.cap {
             let size = capacity.checked_mul(&size_of::<T>()).expect("capacity overflow");
             self.cap = capacity;
             unsafe {

From 026d206aa1e23a2496b5de47c0caf99024cc0f27 Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@gmail.com>
Date: Tue, 1 Apr 2014 20:16:59 +0000
Subject: [PATCH 2/2] Reimplement Vec::push_all* with .extend

It is shorter and also fixes missed reserve call.
---
 src/libstd/vec.rs | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/libstd/vec.rs b/src/libstd/vec.rs
index 4dd1b5d08c0b9..69c3a85b2f160 100644
--- a/src/libstd/vec.rs
+++ b/src/libstd/vec.rs
@@ -230,9 +230,7 @@ impl<T: Clone> Vec<T> {
     /// ```
     #[inline]
     pub fn push_all(&mut self, other: &[T]) {
-        for element in other.iter() {
-            self.push((*element).clone())
-        }
+        self.extend(other.iter().map(|e| e.clone()));
     }
 
     /// Grows the `Vec` in-place.
@@ -947,9 +945,7 @@ impl<T> Vec<T> {
     /// assert_eq!(vec, vec!(~1, ~2, ~3, ~4));
     /// ```
     pub fn push_all_move(&mut self, other: Vec<T>) {
-        for element in other.move_iter() {
-            self.push(element)
-        }
+        self.extend(other.move_iter());
     }
 
     /// Returns a mutable slice of `self` between `start` and `end`.