diff --git a/clippy_lints/src/consts.rs b/clippy_lints/src/consts.rs
index d50cb0557..b1bd6b06e 100644
--- a/clippy_lints/src/consts.rs
+++ b/clippy_lints/src/consts.rs
@@ -171,7 +171,7 @@ pub fn lit_to_constant<'a, 'tcx>(lit: &LitKind, tcx: TyCtxt<'a, 'tcx, 'tcx>, mut
     match *lit {
         LitKind::Str(ref is, style) => Constant::Str(is.to_string(), style),
         LitKind::Byte(b) => Constant::Int(ConstInt::U8(b)),
-        LitKind::ByteStr(ref s) => Constant::Binary(s.clone()),
+        LitKind::ByteStr(ref s) => Constant::Binary(Rc::clone(s)),
         LitKind::Char(c) => Constant::Char(c),
         LitKind::Int(n, hint) => match (&ty.sty, hint) {
             (&ty::TyInt(ity), _) | (_, Signed(ity)) => {
diff --git a/clippy_lints/src/methods.rs b/clippy_lints/src/methods.rs
index 74719d006..90208369c 100644
--- a/clippy_lints/src/methods.rs
+++ b/clippy_lints/src/methods.rs
@@ -310,6 +310,24 @@ declare_lint! {
     "using `clone` on a `Copy` type"
 }
 
+/// **What it does:** Checks for usage of `.clone()` on a ref-counted pointer,
+/// (Rc, Arc, rc::Weak, or sync::Weak), and suggests calling Clone on
+/// the corresponding trait instead.
+///
+/// **Why is this bad?**: Calling '.clone()' on an Rc, Arc, or Weak
+/// can obscure the fact that only the pointer is being cloned, not the underlying
+/// data.
+///
+/// **Example:**
+/// ```rust
+/// x.clone()
+/// ```
+declare_lint! {
+    pub CLONE_ON_REF_PTR,
+    Warn,
+    "using 'clone' on a ref-counted pointer"
+}
+
 /// **What it does:** Checks for usage of `.clone()` on an `&&T`.
 ///
 /// **Why is this bad?** Cloning an `&&T` copies the inner `&T`, instead of
@@ -539,6 +557,7 @@ impl LintPass for Pass {
             OR_FUN_CALL,
             CHARS_NEXT_CMP,
             CLONE_ON_COPY,
+            CLONE_ON_REF_PTR,
             CLONE_DOUBLE_REF,
             NEW_RET_NO_SELF,
             SINGLE_CHAR_PATTERN,
@@ -615,6 +634,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
                 let self_ty = cx.tables.expr_ty_adjusted(&args[0]);
                 if args.len() == 1 && method_call.name == "clone" {
                     lint_clone_on_copy(cx, expr, &args[0], self_ty);
+                    lint_clone_on_ref_ptr(cx, expr, &args[0]);
                 }
 
                 match self_ty.sty {
@@ -853,6 +873,34 @@ fn lint_clone_on_copy(cx: &LateContext, expr: &hir::Expr, arg: &hir::Expr, arg_t
     }
 }
 
+fn lint_clone_on_ref_ptr(cx: &LateContext, expr: &hir::Expr, arg: &hir::Expr) {
+    let (obj_ty, _) = walk_ptrs_ty_depth(cx.tables.expr_ty(arg));
+
+    let caller_type = if match_type(cx, obj_ty, &paths::RC) {
+        "Rc"
+    } else if match_type(cx, obj_ty, &paths::ARC) {
+        "Arc"
+    } else if match_type(cx, obj_ty, &paths::WEAK_RC) || match_type(cx, obj_ty, &paths::WEAK_ARC) {
+        "Weak"
+    } else {
+        return;
+    };
+
+    span_lint_and_sugg(
+        cx,
+        CLONE_ON_REF_PTR,
+        expr.span,
+        "using '.clone()' on a ref-counted pointer",
+        "try this",
+        format!("{}::clone(&{})",
+            caller_type,
+            snippet(cx, arg.span, "_")
+        )
+    );
+
+}
+
+
 fn lint_string_extend(cx: &LateContext, expr: &hir::Expr, args: &[hir::Expr]) {
     let arg = &args[1];
     if let Some(arglists) = method_chain_args(arg, &["chars"]) {
diff --git a/clippy_lints/src/utils/paths.rs b/clippy_lints/src/utils/paths.rs
index 905792009..d18a5af59 100644
--- a/clippy_lints/src/utils/paths.rs
+++ b/clippy_lints/src/utils/paths.rs
@@ -2,6 +2,7 @@
 //! about.
 
 pub const ANY_TRAIT: [&'static str; 3] = ["std", "any", "Any"];
+pub const ARC: [&'static str; 3] = ["alloc", "arc", "Arc"];
 pub const ASMUT_TRAIT: [&'static str; 3] = ["core", "convert", "AsMut"];
 pub const ASREF_TRAIT: [&'static str; 3] = ["core", "convert", "AsRef"];
 pub const BEGIN_PANIC: [&'static str; 3] = ["std", "panicking", "begin_panic"];
@@ -58,6 +59,7 @@ pub const RANGE_TO: [&'static str; 3] = ["core", "ops", "RangeTo"];
 pub const RANGE_TO_INCLUSIVE: [&'static str; 3] = ["core", "ops", "RangeToInclusive"];
 pub const RANGE_TO_INCLUSIVE_STD: [&'static str; 3] = ["std", "ops", "RangeToInclusive"];
 pub const RANGE_TO_STD: [&'static str; 3] = ["std", "ops", "RangeTo"];
+pub const RC: [&'static str; 3] = ["alloc", "rc", "Rc"];
 pub const REGEX: [&'static str; 3] = ["regex", "re_unicode", "Regex"];
 pub const REGEX_BUILDER_NEW: [&'static str; 5] = ["regex", "re_builder", "unicode", "RegexBuilder", "new"];
 pub const REGEX_BYTES: [&'static str; 3] = ["regex", "re_bytes", "Regex"];
@@ -81,3 +83,5 @@ pub const TRY_INTO_RESULT: [&'static str; 4] = ["std", "ops", "Try", "into_resul
 pub const VEC: [&'static str; 3] = ["alloc", "vec", "Vec"];
 pub const VEC_DEQUE: [&'static str; 3] = ["alloc", "vec_deque", "VecDeque"];
 pub const VEC_FROM_ELEM: [&'static str; 3] = ["alloc", "vec", "from_elem"];
+pub const WEAK_ARC: [&'static str; 3] = ["alloc", "arc", "Weak"];
+pub const WEAK_RC: [&'static str; 3] = ["alloc", "rc", "Weak"];
diff --git a/tests/ui/methods.rs b/tests/ui/methods.rs
index a9716d4e7..3bbaff29c 100644
--- a/tests/ui/methods.rs
+++ b/tests/ui/methods.rs
@@ -11,6 +11,8 @@ use std::collections::HashSet;
 use std::collections::VecDeque;
 use std::ops::Mul;
 use std::iter::FromIterator;
+use std::rc::{self, Rc};
+use std::sync::{self, Arc};
 
 struct T;
 
@@ -456,6 +458,28 @@ fn clone_on_copy() {
     (&42).clone();
 }
 
+fn clone_on_ref_ptr() {
+    let rc = Rc::new(true);
+    let arc = Arc::new(true);
+
+    let rcweak = Rc::downgrade(&rc);
+    let arc_weak = Arc::downgrade(&arc);
+
+    rc.clone();
+    Rc::clone(&rc);
+
+    arc.clone();
+    Arc::clone(&arc);
+
+    rcweak.clone();
+    rc::Weak::clone(&rcweak);
+
+    arc_weak.clone();
+    sync::Weak::clone(&arc_weak);
+
+
+}
+
 fn clone_on_copy_generic<T: Copy>(t: T) {
     t.clone();
 
diff --git a/tests/ui/methods.stderr b/tests/ui/methods.stderr
index 8570dccd0..e22fdc116 100644
--- a/tests/ui/methods.stderr
+++ b/tests/ui/methods.stderr
@@ -1,716 +1,742 @@
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:18:25
+  --> $DIR/methods.rs:20:25
    |
-18 |     fn add(self, other: T) -> T { self }
+20 |     fn add(self, other: T) -> T { self }
    |                         ^ help: use the applicable keyword: `Self`
    |
    = note: `-D use-self` implied by `-D warnings`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:18:31
+  --> $DIR/methods.rs:20:31
    |
-18 |     fn add(self, other: T) -> T { self }
+20 |     fn add(self, other: T) -> T { self }
    |                               ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:21:26
+  --> $DIR/methods.rs:23:26
    |
-21 |     fn sub(&self, other: T) -> &T { self } // no error, self is a ref
+23 |     fn sub(&self, other: T) -> &T { self } // no error, self is a ref
    |                          ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:21:33
+  --> $DIR/methods.rs:23:33
    |
-21 |     fn sub(&self, other: T) -> &T { self } // no error, self is a ref
+23 |     fn sub(&self, other: T) -> &T { self } // no error, self is a ref
    |                                 ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:22:21
+  --> $DIR/methods.rs:24:21
    |
-22 |     fn div(self) -> T { self } // no error, different #arguments
+24 |     fn div(self) -> T { self } // no error, different #arguments
    |                     ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:23:25
+  --> $DIR/methods.rs:25:25
    |
-23 |     fn rem(self, other: T) { } // no error, wrong return type
+25 |     fn rem(self, other: T) { } // no error, wrong return type
    |                         ^ help: use the applicable keyword: `Self`
 
 error: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
-  --> $DIR/methods.rs:18:5
+  --> $DIR/methods.rs:20:5
    |
-18 |     fn add(self, other: T) -> T { self }
+20 |     fn add(self, other: T) -> T { self }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D should-implement-trait` implied by `-D warnings`
 
 error: defining a method called `drop` on this type; consider implementing the `std::ops::Drop` trait or choosing a less ambiguous name
-  --> $DIR/methods.rs:19:5
+  --> $DIR/methods.rs:21:5
    |
-19 |     fn drop(&mut self) { }
+21 |     fn drop(&mut self) { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 error: methods called `into_*` usually take self by value; consider choosing a less ambiguous name
-  --> $DIR/methods.rs:26:17
+  --> $DIR/methods.rs:28:17
    |
-26 |     fn into_u16(&self) -> u16 { 0 }
+28 |     fn into_u16(&self) -> u16 { 0 }
    |                 ^^^^^
    |
    = note: `-D wrong-self-convention` implied by `-D warnings`
 
 error: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
-  --> $DIR/methods.rs:28:21
+  --> $DIR/methods.rs:30:21
    |
-28 |     fn to_something(self) -> u32 { 0 }
+30 |     fn to_something(self) -> u32 { 0 }
    |                     ^^^^
 
 error: methods called `new` usually take no self; consider choosing a less ambiguous name
-  --> $DIR/methods.rs:30:12
+  --> $DIR/methods.rs:32:12
    |
-30 |     fn new(self) {}
+32 |     fn new(self) {}
    |            ^^^^
 
 error: methods called `new` usually return `Self`
-  --> $DIR/methods.rs:30:5
+  --> $DIR/methods.rs:32:5
    |
-30 |     fn new(self) {}
+32 |     fn new(self) {}
    |     ^^^^^^^^^^^^^^^
    |
    = note: `-D new-ret-no-self` implied by `-D warnings`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:74:24
+  --> $DIR/methods.rs:76:24
    |
-74 |     fn new() -> Option<V<T>> { None }
+76 |     fn new() -> Option<V<T>> { None }
    |                        ^^^^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:78:19
+  --> $DIR/methods.rs:80:19
    |
-78 |     type Output = T;
+80 |     type Output = T;
    |                   ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:79:25
+  --> $DIR/methods.rs:81:25
    |
-79 |     fn mul(self, other: T) -> T { self } // no error, obviously
+81 |     fn mul(self, other: T) -> T { self } // no error, obviously
    |                         ^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-  --> $DIR/methods.rs:79:31
+  --> $DIR/methods.rs:81:31
    |
-79 |     fn mul(self, other: T) -> T { self } // no error, obviously
+81 |     fn mul(self, other: T) -> T { self } // no error, obviously
    |                               ^ help: use the applicable keyword: `Self`
 
 error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
-  --> $DIR/methods.rs:97:13
-   |
-97 |       let _ = opt.map(|x| x + 1)
-   |  _____________^
-98 | |
-99 | |                .unwrap_or(0); // should lint even though this call is on a separate line
-   | |____________________________^
-   |
-   = note: `-D option-map-unwrap-or` implied by `-D warnings`
-   = note: replace `map(|x| x + 1).unwrap_or(0)` with `map_or(0, |x| x + 1)`
+   --> $DIR/methods.rs:99:13
+    |
+99  |       let _ = opt.map(|x| x + 1)
+    |  _____________^
+100 | |
+101 | |                .unwrap_or(0); // should lint even though this call is on a separate line
+    | |____________________________^
+    |
+    = note: `-D option-map-unwrap-or` implied by `-D warnings`
+    = note: replace `map(|x| x + 1).unwrap_or(0)` with `map_or(0, |x| x + 1)`
 
 error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
-   --> $DIR/methods.rs:101:13
+   --> $DIR/methods.rs:103:13
     |
-101 |       let _ = opt.map(|x| {
+103 |       let _ = opt.map(|x| {
     |  _____________^
-102 | |                         x + 1
-103 | |                     }
-104 | |               ).unwrap_or(0);
+104 | |                         x + 1
+105 | |                     }
+106 | |               ).unwrap_or(0);
     | |____________________________^
 
 error: called `map(f).unwrap_or(a)` on an Option value. This can be done more directly by calling `map_or(a, f)` instead
-   --> $DIR/methods.rs:105:13
+   --> $DIR/methods.rs:107:13
     |
-105 |       let _ = opt.map(|x| x + 1)
+107 |       let _ = opt.map(|x| x + 1)
     |  _____________^
-106 | |                .unwrap_or({
-107 | |                     0
-108 | |                 });
+108 | |                .unwrap_or({
+109 | |                     0
+110 | |                 });
     | |__________________^
 
 error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
-   --> $DIR/methods.rs:114:13
+   --> $DIR/methods.rs:116:13
     |
-114 |       let _ = opt.map(|x| x + 1)
+116 |       let _ = opt.map(|x| x + 1)
     |  _____________^
-115 | |
-116 | |                .unwrap_or_else(|| 0); // should lint even though this call is on a separate line
+117 | |
+118 | |                .unwrap_or_else(|| 0); // should lint even though this call is on a separate line
     | |____________________________________^
     |
     = note: `-D option-map-unwrap-or-else` implied by `-D warnings`
     = note: replace `map(|x| x + 1).unwrap_or_else(|| 0)` with `map_or_else(|| 0, |x| x + 1)`
 
 error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
-   --> $DIR/methods.rs:118:13
+   --> $DIR/methods.rs:120:13
     |
-118 |       let _ = opt.map(|x| {
+120 |       let _ = opt.map(|x| {
     |  _____________^
-119 | |                         x + 1
-120 | |                     }
-121 | |               ).unwrap_or_else(|| 0);
+121 | |                         x + 1
+122 | |                     }
+123 | |               ).unwrap_or_else(|| 0);
     | |____________________________________^
 
 error: called `map(f).unwrap_or_else(g)` on an Option value. This can be done more directly by calling `map_or_else(g, f)` instead
-   --> $DIR/methods.rs:122:13
+   --> $DIR/methods.rs:124:13
     |
-122 |       let _ = opt.map(|x| x + 1)
+124 |       let _ = opt.map(|x| x + 1)
     |  _____________^
-123 | |                .unwrap_or_else(||
-124 | |                     0
-125 | |                 );
+125 | |                .unwrap_or_else(||
+126 | |                     0
+127 | |                 );
     | |_________________^
 
 error: unnecessary structure name repetition
-   --> $DIR/methods.rs:151:24
+   --> $DIR/methods.rs:153:24
     |
-151 |     fn filter(self) -> IteratorFalsePositives {
+153 |     fn filter(self) -> IteratorFalsePositives {
     |                        ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-   --> $DIR/methods.rs:155:22
+   --> $DIR/methods.rs:157:22
     |
-155 |     fn next(self) -> IteratorFalsePositives {
+157 |     fn next(self) -> IteratorFalsePositives {
     |                      ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
 
 error: unnecessary structure name repetition
-   --> $DIR/methods.rs:175:32
+   --> $DIR/methods.rs:177:32
     |
-175 |     fn skip(self, _: usize) -> IteratorFalsePositives {
+177 |     fn skip(self, _: usize) -> IteratorFalsePositives {
     |                                ^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
 
 error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
-   --> $DIR/methods.rs:194:13
+   --> $DIR/methods.rs:196:13
     |
-194 |     let _ = v.iter().filter(|&x| *x < 0).next();
+196 |     let _ = v.iter().filter(|&x| *x < 0).next();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D filter-next` implied by `-D warnings`
     = note: replace `filter(|&x| *x < 0).next()` with `find(|&x| *x < 0)`
 
 error: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
-   --> $DIR/methods.rs:197:13
+   --> $DIR/methods.rs:199:13
     |
-197 |       let _ = v.iter().filter(|&x| {
+199 |       let _ = v.iter().filter(|&x| {
     |  _____________^
-198 | |                                 *x < 0
-199 | |                             }
-200 | |                    ).next();
+200 | |                                 *x < 0
+201 | |                             }
+202 | |                    ).next();
     | |___________________________^
 
 error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:212:13
+   --> $DIR/methods.rs:214:13
     |
-212 |     let _ = v.iter().find(|&x| *x < 0).is_some();
+214 |     let _ = v.iter().find(|&x| *x < 0).is_some();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D search-is-some` implied by `-D warnings`
     = note: replace `find(|&x| *x < 0).is_some()` with `any(|&x| *x < 0)`
 
 error: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:215:13
+   --> $DIR/methods.rs:217:13
     |
-215 |       let _ = v.iter().find(|&x| {
+217 |       let _ = v.iter().find(|&x| {
     |  _____________^
-216 | |                               *x < 0
-217 | |                           }
-218 | |                    ).is_some();
+218 | |                               *x < 0
+219 | |                           }
+220 | |                    ).is_some();
     | |______________________________^
 
 error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:221:13
+   --> $DIR/methods.rs:223:13
     |
-221 |     let _ = v.iter().position(|&x| x < 0).is_some();
+223 |     let _ = v.iter().position(|&x| x < 0).is_some();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: replace `position(|&x| x < 0).is_some()` with `any(|&x| x < 0)`
 
 error: called `is_some()` after searching an `Iterator` with position. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:224:13
+   --> $DIR/methods.rs:226:13
     |
-224 |       let _ = v.iter().position(|&x| {
+226 |       let _ = v.iter().position(|&x| {
     |  _____________^
-225 | |                                   x < 0
-226 | |                               }
-227 | |                    ).is_some();
+227 | |                                   x < 0
+228 | |                               }
+229 | |                    ).is_some();
     | |______________________________^
 
 error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:230:13
+   --> $DIR/methods.rs:232:13
     |
-230 |     let _ = v.iter().rposition(|&x| x < 0).is_some();
+232 |     let _ = v.iter().rposition(|&x| x < 0).is_some();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: replace `rposition(|&x| x < 0).is_some()` with `any(|&x| x < 0)`
 
 error: called `is_some()` after searching an `Iterator` with rposition. This is more succinctly expressed by calling `any()`.
-   --> $DIR/methods.rs:233:13
+   --> $DIR/methods.rs:235:13
     |
-233 |       let _ = v.iter().rposition(|&x| {
+235 |       let _ = v.iter().rposition(|&x| {
     |  _____________^
-234 | |                                    x < 0
-235 | |                                }
-236 | |                    ).is_some();
+236 | |                                    x < 0
+237 | |                                }
+238 | |                    ).is_some();
     | |______________________________^
 
 error: unnecessary structure name repetition
-   --> $DIR/methods.rs:250:21
+   --> $DIR/methods.rs:252:21
     |
-250 |         fn new() -> Foo { Foo }
+252 |         fn new() -> Foo { Foo }
     |                     ^^^ help: use the applicable keyword: `Self`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:268:5
+   --> $DIR/methods.rs:270:5
     |
-268 |     with_constructor.unwrap_or(make());
+270 |     with_constructor.unwrap_or(make());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_constructor.unwrap_or_else(make)`
     |
     = note: `-D or-fun-call` implied by `-D warnings`
 
 error: use of `unwrap_or` followed by a call to `new`
-   --> $DIR/methods.rs:271:5
+   --> $DIR/methods.rs:273:5
     |
-271 |     with_new.unwrap_or(Vec::new());
+273 |     with_new.unwrap_or(Vec::new());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_new.unwrap_or_default()`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:274:5
+   --> $DIR/methods.rs:276:5
     |
-274 |     with_const_args.unwrap_or(Vec::with_capacity(12));
+276 |     with_const_args.unwrap_or(Vec::with_capacity(12));
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_const_args.unwrap_or_else(|| Vec::with_capacity(12))`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:277:5
+   --> $DIR/methods.rs:279:5
     |
-277 |     with_err.unwrap_or(make());
+279 |     with_err.unwrap_or(make());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err.unwrap_or_else(|_| make())`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:280:5
+   --> $DIR/methods.rs:282:5
     |
-280 |     with_err_args.unwrap_or(Vec::with_capacity(12));
+282 |     with_err_args.unwrap_or(Vec::with_capacity(12));
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_err_args.unwrap_or_else(|_| Vec::with_capacity(12))`
 
 error: use of `unwrap_or` followed by a call to `default`
-   --> $DIR/methods.rs:283:5
+   --> $DIR/methods.rs:285:5
     |
-283 |     with_default_trait.unwrap_or(Default::default());
+285 |     with_default_trait.unwrap_or(Default::default());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_trait.unwrap_or_default()`
 
 error: use of `unwrap_or` followed by a call to `default`
-   --> $DIR/methods.rs:286:5
+   --> $DIR/methods.rs:288:5
     |
-286 |     with_default_type.unwrap_or(u64::default());
+288 |     with_default_type.unwrap_or(u64::default());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_default_type.unwrap_or_default()`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:289:5
+   --> $DIR/methods.rs:291:5
     |
-289 |     with_vec.unwrap_or(vec![]);
+291 |     with_vec.unwrap_or(vec![]);
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `with_vec.unwrap_or_else(|| < [ _ ] > :: into_vec ( box [ $ ( $ x ) , * ] ))`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:294:5
+   --> $DIR/methods.rs:296:5
     |
-294 |     without_default.unwrap_or(Foo::new());
+296 |     without_default.unwrap_or(Foo::new());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `without_default.unwrap_or_else(Foo::new)`
 
 error: use of `or_insert` followed by a function call
-   --> $DIR/methods.rs:297:5
+   --> $DIR/methods.rs:299:5
     |
-297 |     map.entry(42).or_insert(String::new());
+299 |     map.entry(42).or_insert(String::new());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `map.entry(42).or_insert_with(String::new)`
 
 error: use of `or_insert` followed by a function call
-   --> $DIR/methods.rs:300:5
+   --> $DIR/methods.rs:302:5
     |
-300 |     btree.entry(42).or_insert(String::new());
+302 |     btree.entry(42).or_insert(String::new());
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `btree.entry(42).or_insert_with(String::new)`
 
 error: use of `unwrap_or` followed by a function call
-   --> $DIR/methods.rs:303:13
+   --> $DIR/methods.rs:305:13
     |
-303 |     let _ = stringy.unwrap_or("".to_owned());
+305 |     let _ = stringy.unwrap_or("".to_owned());
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `stringy.unwrap_or_else(|| "".to_owned())`
 
 error: called `.iter().nth()` on a Vec. Calling `.get()` is both faster and more readable
-   --> $DIR/methods.rs:314:23
+   --> $DIR/methods.rs:316:23
     |
-314 |         let bad_vec = some_vec.iter().nth(3);
+316 |         let bad_vec = some_vec.iter().nth(3);
     |                       ^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D iter-nth` implied by `-D warnings`
 
 error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
-   --> $DIR/methods.rs:315:26
+   --> $DIR/methods.rs:317:26
     |
-315 |         let bad_slice = &some_vec[..].iter().nth(3);
+317 |         let bad_slice = &some_vec[..].iter().nth(3);
     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
-   --> $DIR/methods.rs:316:31
+   --> $DIR/methods.rs:318:31
     |
-316 |         let bad_boxed_slice = boxed_slice.iter().nth(3);
+318 |         let bad_boxed_slice = boxed_slice.iter().nth(3);
     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.iter().nth()` on a VecDeque. Calling `.get()` is both faster and more readable
-   --> $DIR/methods.rs:317:29
+   --> $DIR/methods.rs:319:29
     |
-317 |         let bad_vec_deque = some_vec_deque.iter().nth(3);
+319 |         let bad_vec_deque = some_vec_deque.iter().nth(3);
     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.iter_mut().nth()` on a Vec. Calling `.get_mut()` is both faster and more readable
-   --> $DIR/methods.rs:322:23
+   --> $DIR/methods.rs:324:23
     |
-322 |         let bad_vec = some_vec.iter_mut().nth(3);
+324 |         let bad_vec = some_vec.iter_mut().nth(3);
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.iter_mut().nth()` on a slice. Calling `.get_mut()` is both faster and more readable
-   --> $DIR/methods.rs:325:26
+   --> $DIR/methods.rs:327:26
     |
-325 |         let bad_slice = &some_vec[..].iter_mut().nth(3);
+327 |         let bad_slice = &some_vec[..].iter_mut().nth(3);
     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.iter_mut().nth()` on a VecDeque. Calling `.get_mut()` is both faster and more readable
-   --> $DIR/methods.rs:328:29
+   --> $DIR/methods.rs:330:29
     |
-328 |         let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
+330 |         let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
-   --> $DIR/methods.rs:340:13
+   --> $DIR/methods.rs:342:13
     |
-340 |     let _ = some_vec.iter().skip(42).next();
+342 |     let _ = some_vec.iter().skip(42).next();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D iter-skip-next` implied by `-D warnings`
 
 error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
-   --> $DIR/methods.rs:341:13
+   --> $DIR/methods.rs:343:13
     |
-341 |     let _ = some_vec.iter().cycle().skip(42).next();
+343 |     let _ = some_vec.iter().cycle().skip(42).next();
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
-   --> $DIR/methods.rs:342:13
+   --> $DIR/methods.rs:344:13
     |
-342 |     let _ = (1..10).skip(10).next();
+344 |     let _ = (1..10).skip(10).next();
     |             ^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `skip(x).next()` on an iterator. This is more succinctly expressed by calling `nth(x)`
-   --> $DIR/methods.rs:343:14
+   --> $DIR/methods.rs:345:14
     |
-343 |     let _ = &some_vec[..].iter().skip(3).next();
+345 |     let _ = &some_vec[..].iter().skip(3).next();
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:369:17
+   --> $DIR/methods.rs:371:17
     |
-369 |         let _ = boxed_slice.get(1).unwrap();
+371 |         let _ = boxed_slice.get(1).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]`
     |
     = note: `-D get-unwrap` implied by `-D warnings`
 
 error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:370:17
+   --> $DIR/methods.rs:372:17
     |
-370 |         let _ = some_slice.get(0).unwrap();
+372 |         let _ = some_slice.get(0).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_slice[0]`
 
 error: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:371:17
+   --> $DIR/methods.rs:373:17
     |
-371 |         let _ = some_vec.get(0).unwrap();
+373 |         let _ = some_vec.get(0).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vec[0]`
 
 error: called `.get().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:372:17
+   --> $DIR/methods.rs:374:17
     |
-372 |         let _ = some_vecdeque.get(0).unwrap();
+374 |         let _ = some_vecdeque.get(0).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vecdeque[0]`
 
 error: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:373:17
+   --> $DIR/methods.rs:375:17
     |
-373 |         let _ = some_hashmap.get(&1).unwrap();
+375 |         let _ = some_hashmap.get(&1).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_hashmap[&1]`
 
 error: called `.get().unwrap()` on a BTreeMap. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:374:17
+   --> $DIR/methods.rs:376:17
     |
-374 |         let _ = some_btreemap.get(&1).unwrap();
+376 |         let _ = some_btreemap.get(&1).unwrap();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_btreemap[&1]`
 
 error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:379:10
+   --> $DIR/methods.rs:381:10
     |
-379 |         *boxed_slice.get_mut(0).unwrap() = 1;
+381 |         *boxed_slice.get_mut(0).unwrap() = 1;
     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut boxed_slice[0]`
 
 error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:380:10
+   --> $DIR/methods.rs:382:10
     |
-380 |         *some_slice.get_mut(0).unwrap() = 1;
+382 |         *some_slice.get_mut(0).unwrap() = 1;
     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_slice[0]`
 
 error: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:381:10
+   --> $DIR/methods.rs:383:10
     |
-381 |         *some_vec.get_mut(0).unwrap() = 1;
+383 |         *some_vec.get_mut(0).unwrap() = 1;
     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vec[0]`
 
 error: called `.get_mut().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
-   --> $DIR/methods.rs:382:10
+   --> $DIR/methods.rs:384:10
     |
-382 |         *some_vecdeque.get_mut(0).unwrap() = 1;
+384 |         *some_vecdeque.get_mut(0).unwrap() = 1;
     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&mut some_vecdeque[0]`
 
 error: used unwrap() on an Option value. If you don't want to handle the None case gracefully, consider using expect() to provide a better panic message
-   --> $DIR/methods.rs:396:13
+   --> $DIR/methods.rs:398:13
     |
-396 |     let _ = opt.unwrap();
+398 |     let _ = opt.unwrap();
     |             ^^^^^^^^^^^^
     |
     = note: `-D option-unwrap-used` implied by `-D warnings`
 
 error: used unwrap() on a Result value. If you don't want to handle the Err case gracefully, consider using expect() to provide a better panic message
-   --> $DIR/methods.rs:399:13
+   --> $DIR/methods.rs:401:13
     |
-399 |     let _ = res.unwrap();
+401 |     let _ = res.unwrap();
     |             ^^^^^^^^^^^^
     |
     = note: `-D result-unwrap-used` implied by `-D warnings`
 
 error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
-   --> $DIR/methods.rs:401:5
+   --> $DIR/methods.rs:403:5
     |
-401 |     res.ok().expect("disaster!");
+403 |     res.ok().expect("disaster!");
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D ok-expect` implied by `-D warnings`
 
-error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
-   --> $DIR/methods.rs:407:5
-    |
-407 |     res3.ok().expect("whoof");
-    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
-
 error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
    --> $DIR/methods.rs:409:5
     |
-409 |     res4.ok().expect("argh");
-    |     ^^^^^^^^^^^^^^^^^^^^^^^^
+409 |     res3.ok().expect("whoof");
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
    --> $DIR/methods.rs:411:5
     |
-411 |     res5.ok().expect("oops");
+411 |     res4.ok().expect("argh");
     |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
    --> $DIR/methods.rs:413:5
     |
-413 |     res6.ok().expect("meh");
+413 |     res5.ok().expect("oops");
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
+   --> $DIR/methods.rs:415:5
+    |
+415 |     res6.ok().expect("meh");
     |     ^^^^^^^^^^^^^^^^^^^^^^^
 
 error: you should use the `starts_with` method
-   --> $DIR/methods.rs:425:5
+   --> $DIR/methods.rs:427:5
     |
-425 |     "".chars().next() == Some(' ');
+427 |     "".chars().next() == Some(' ');
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".starts_with(' ')`
     |
     = note: `-D chars-next-cmp` implied by `-D warnings`
 
 error: you should use the `starts_with` method
-   --> $DIR/methods.rs:426:5
+   --> $DIR/methods.rs:428:5
     |
-426 |     Some(' ') != "".chars().next();
+428 |     Some(' ') != "".chars().next();
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".starts_with(' ')`
 
 error: calling `.extend(_.chars())`
-   --> $DIR/methods.rs:435:5
+   --> $DIR/methods.rs:437:5
     |
-435 |     s.extend(abc.chars());
+437 |     s.extend(abc.chars());
     |     ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(abc)`
     |
     = note: `-D string-extend-chars` implied by `-D warnings`
 
 error: calling `.extend(_.chars())`
-   --> $DIR/methods.rs:438:5
+   --> $DIR/methods.rs:440:5
     |
-438 |     s.extend("abc".chars());
+440 |     s.extend("abc".chars());
     |     ^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str("abc")`
 
 error: calling `.extend(_.chars())`
-   --> $DIR/methods.rs:441:5
+   --> $DIR/methods.rs:443:5
     |
-441 |     s.extend(def.chars());
+443 |     s.extend(def.chars());
     |     ^^^^^^^^^^^^^^^^^^^^^ help: try this: `s.push_str(&def)`
 
 error: using `clone` on a `Copy` type
-   --> $DIR/methods.rs:452:5
+   --> $DIR/methods.rs:454:5
     |
-452 |     42.clone();
+454 |     42.clone();
     |     ^^^^^^^^^^ help: try removing the `clone` call: `42`
     |
     = note: `-D clone-on-copy` implied by `-D warnings`
 
 error: using `clone` on a `Copy` type
-   --> $DIR/methods.rs:456:5
+   --> $DIR/methods.rs:458:5
     |
-456 |     (&42).clone();
+458 |     (&42).clone();
     |     ^^^^^^^^^^^^^ help: try dereferencing it: `*(&42)`
 
-error: using `clone` on a `Copy` type
-   --> $DIR/methods.rs:460:5
+error: using '.clone()' on a ref-counted pointer
+   --> $DIR/methods.rs:468:5
     |
-460 |     t.clone();
+468 |     rc.clone();
+    |     ^^^^^^^^^^ help: try this: `Rc::clone(&rc)`
+    |
+    = note: `-D clone-on-ref-ptr` implied by `-D warnings`
+
+error: using '.clone()' on a ref-counted pointer
+   --> $DIR/methods.rs:471:5
+    |
+471 |     arc.clone();
+    |     ^^^^^^^^^^^ help: try this: `Arc::clone(&arc)`
+
+error: using '.clone()' on a ref-counted pointer
+   --> $DIR/methods.rs:474:5
+    |
+474 |     rcweak.clone();
+    |     ^^^^^^^^^^^^^^ help: try this: `Weak::clone(&rcweak)`
+
+error: using '.clone()' on a ref-counted pointer
+   --> $DIR/methods.rs:477:5
+    |
+477 |     arc_weak.clone();
+    |     ^^^^^^^^^^^^^^^^ help: try this: `Weak::clone(&arc_weak)`
+
+error: using `clone` on a `Copy` type
+   --> $DIR/methods.rs:484:5
+    |
+484 |     t.clone();
     |     ^^^^^^^^^ help: try removing the `clone` call: `t`
 
 error: using `clone` on a `Copy` type
-   --> $DIR/methods.rs:462:5
+   --> $DIR/methods.rs:486:5
     |
-462 |     Some(t).clone();
+486 |     Some(t).clone();
     |     ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `Some(t)`
 
 error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
-   --> $DIR/methods.rs:468:22
+   --> $DIR/methods.rs:492:22
     |
-468 |     let z: &Vec<_> = y.clone();
+492 |     let z: &Vec<_> = y.clone();
     |                      ^^^^^^^^^ help: try dereferencing it: `(*y).clone()`
     |
     = note: `-D clone-double-ref` implied by `-D warnings`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:475:13
+   --> $DIR/methods.rs:499:13
     |
-475 |     x.split("x");
+499 |     x.split("x");
     |     --------^^^- help: try using a char instead: `x.split('x')`
     |
     = note: `-D single-char-pattern` implied by `-D warnings`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:492:16
+   --> $DIR/methods.rs:516:16
     |
-492 |     x.contains("x");
+516 |     x.contains("x");
     |     -----------^^^- help: try using a char instead: `x.contains('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:493:19
+   --> $DIR/methods.rs:517:19
     |
-493 |     x.starts_with("x");
+517 |     x.starts_with("x");
     |     --------------^^^- help: try using a char instead: `x.starts_with('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:494:17
+   --> $DIR/methods.rs:518:17
     |
-494 |     x.ends_with("x");
+518 |     x.ends_with("x");
     |     ------------^^^- help: try using a char instead: `x.ends_with('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:495:12
+   --> $DIR/methods.rs:519:12
     |
-495 |     x.find("x");
+519 |     x.find("x");
     |     -------^^^- help: try using a char instead: `x.find('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:496:13
+   --> $DIR/methods.rs:520:13
     |
-496 |     x.rfind("x");
+520 |     x.rfind("x");
     |     --------^^^- help: try using a char instead: `x.rfind('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:497:14
+   --> $DIR/methods.rs:521:14
     |
-497 |     x.rsplit("x");
+521 |     x.rsplit("x");
     |     ---------^^^- help: try using a char instead: `x.rsplit('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:498:24
+   --> $DIR/methods.rs:522:24
     |
-498 |     x.split_terminator("x");
+522 |     x.split_terminator("x");
     |     -------------------^^^- help: try using a char instead: `x.split_terminator('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:499:25
+   --> $DIR/methods.rs:523:25
     |
-499 |     x.rsplit_terminator("x");
+523 |     x.rsplit_terminator("x");
     |     --------------------^^^- help: try using a char instead: `x.rsplit_terminator('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:500:17
+   --> $DIR/methods.rs:524:17
     |
-500 |     x.splitn(0, "x");
+524 |     x.splitn(0, "x");
     |     ------------^^^- help: try using a char instead: `x.splitn(0, 'x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:501:18
+   --> $DIR/methods.rs:525:18
     |
-501 |     x.rsplitn(0, "x");
+525 |     x.rsplitn(0, "x");
     |     -------------^^^- help: try using a char instead: `x.rsplitn(0, 'x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:502:15
+   --> $DIR/methods.rs:526:15
     |
-502 |     x.matches("x");
+526 |     x.matches("x");
     |     ----------^^^- help: try using a char instead: `x.matches('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:503:16
+   --> $DIR/methods.rs:527:16
     |
-503 |     x.rmatches("x");
+527 |     x.rmatches("x");
     |     -----------^^^- help: try using a char instead: `x.rmatches('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:504:21
+   --> $DIR/methods.rs:528:21
     |
-504 |     x.match_indices("x");
+528 |     x.match_indices("x");
     |     ----------------^^^- help: try using a char instead: `x.match_indices('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:505:22
+   --> $DIR/methods.rs:529:22
     |
-505 |     x.rmatch_indices("x");
+529 |     x.rmatch_indices("x");
     |     -----------------^^^- help: try using a char instead: `x.rmatch_indices('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:506:25
+   --> $DIR/methods.rs:530:25
     |
-506 |     x.trim_left_matches("x");
+530 |     x.trim_left_matches("x");
     |     --------------------^^^- help: try using a char instead: `x.trim_left_matches('x')`
 
 error: single-character string constant used as pattern
-   --> $DIR/methods.rs:507:26
+   --> $DIR/methods.rs:531:26
     |
-507 |     x.trim_right_matches("x");
+531 |     x.trim_right_matches("x");
     |     ---------------------^^^- help: try using a char instead: `x.trim_right_matches('x')`
 
 error: you are getting the inner pointer of a temporary `CString`
-   --> $DIR/methods.rs:517:5
+   --> $DIR/methods.rs:541:5
     |
-517 |     CString::new("foo").unwrap().as_ptr();
+541 |     CString::new("foo").unwrap().as_ptr();
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D temporary-cstring-as-ptr` implied by `-D warnings`
     = note: that pointer will be invalid outside this expression
 help: assign the `CString` to a variable to extend its lifetime
-   --> $DIR/methods.rs:517:5
+   --> $DIR/methods.rs:541:5
     |
-517 |     CString::new("foo").unwrap().as_ptr();
+541 |     CString::new("foo").unwrap().as_ptr();
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: called `cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
-   --> $DIR/methods.rs:522:27
+   --> $DIR/methods.rs:546:27
     |
-522 |     let v2 : Vec<isize> = v.iter().cloned().collect();
+546 |     let v2 : Vec<isize> = v.iter().cloned().collect();
     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D iter-cloned-collect` implied by `-D warnings`
 
-error: aborting due to 103 previous errors
+error: aborting due to 107 previous errors