suggest adding a where-clause when that can help

suggest adding a where-clause when there is an unmet trait-bound that
can be satisfied if some type can implement it.

src/doc/book/closures.md

@@ -371,14 +371,13 @@ assert_eq!(6, answer);
 This gives us these long, related errors:
 
 ```text
-error: the trait `core::marker::Sized` is not implemented for the type
+error: the predicate `core::ops::Fn(i32) -> i32 : core::marker::Sized` is not satisfied [E0277]
-`core::ops::Fn(i32) -> i32` [E0277]
 fn factory() -> (Fn(i32) -> i32) {
                 ^~~~~~~~~~~~~~~~
 note: `core::ops::Fn(i32) -> i32` does not have a constant size known at compile-time
 fn factory() -> (Fn(i32) -> i32) {
                 ^~~~~~~~~~~~~~~~
-error: the trait `core::marker::Sized` is not implemented for the type `core::ops::Fn(i32) -> i32` [E0277]
+error: the predicate `core::ops::Fn(i32) -> i32 : core::marker::Sized` is not satisfied [E0277]
 let f = factory();
     ^
 note: `core::ops::Fn(i32) -> i32` does not have a constant size known at compile-time

src/doc/book/concurrency.md

@@ -231,8 +231,8 @@ fn main() {
 This won't work, however, and will give us the error:
 
 ```text
-13:9: 13:22 error: the trait `core::marker::Send` is not
+13:9: 13:22 error: the predicate `alloc::rc::Rc<collections::vec::Vec<i32>> : core::marker::Send`
-            implemented for the type `alloc::rc::Rc<collections::vec::Vec<i32>>`
+            is not satisfied
 ...
 13:9: 13:22 note: `alloc::rc::Rc<collections::vec::Vec<i32>>`
             cannot be sent between threads safely

src/doc/book/traits.md

@@ -154,7 +154,7 @@ print_area(5);
 We get a compile-time error:
 
 ```text
-error: the trait `HasArea` is not implemented for the type `_` [E0277]
+error: the predicate `_ : HasArea` is not satisfied [E0277]
 ```
 
 ## Trait bounds on generic structs
@@ -496,7 +496,7 @@ impl FooBar for Baz {
 If we forget to implement `Foo`, Rust will tell us:
 
 ```text
-error: the trait `main::Foo` is not implemented for the type `main::Baz` [E0277]
+error: the predicate `main::Baz : main::Foo` is not satisfied [E0277]
 ```
 
 # Deriving

src/doc/book/vectors.md

@@ -56,8 +56,8 @@ v[j];
 Indexing with a non-`usize` type gives an error that looks like this:
 
 ```text
-error: the trait `core::ops::Index<i32>` is not implemented for the type
+error: the predicate `collections::vec::Vec<_> : core::ops::Index<i32>`
-`collections::vec::Vec<_>` [E0277]
+is not satisfied [E0277]
 v[j];
 ^~~~
 note: the type `collections::vec::Vec<_>` cannot be indexed by `i32`

src/doc/nomicon/coercions.md

@@ -64,7 +64,7 @@ fn main() {
 ```
 
 ```text
-<anon>:10:5: 10:8 error: the trait `Trait` is not implemented for the type `&mut i32` [E0277]
+<anon>:10:5: 10:8 error: the predicate `&mut i32 : Trait` is not satisfied [E0277]
 <anon>:10     foo(t);
               ^~~
 ```

src/librustc/diagnostics.rs

@@ -1006,8 +1006,7 @@ fn some_func<T: Foo>(foo: T) {
 fn main() {
     // we now call the method with the i32 type, which doesn't implement
     // the Foo trait
-    some_func(5i32); // error: the trait `Foo` is not implemented for the
+    some_func(5i32); // error: the predicate `i32 : Foo` is not satisfied
-                     //        type `i32`
 }
 ```
 

src/librustc/traits/error_reporting.rs

@@ -13,10 +13,12 @@ use super::{
     FulfillmentErrorCode,
     MismatchedProjectionTypes,
     Obligation,
+    ObligationCause,
     ObligationCauseCode,
     OutputTypeParameterMismatch,
     TraitNotObjectSafe,
     PredicateObligation,
+    SelectionContext,
     SelectionError,
     ObjectSafetyViolation,
     MethodViolationCode,
@@ -26,8 +28,9 @@ use super::{
 use fmt_macros::{Parser, Piece, Position};
 use middle::def_id::DefId;
 use infer::InferCtxt;
-use ty::{self, ToPredicate, ToPolyTraitRef, TraitRef, Ty, TyCtxt, TypeFoldable};
+use ty::{self, ToPredicate, ToPolyTraitRef, Ty, TyCtxt};
 use ty::fast_reject;
+use ty::fold::{TypeFoldable, TypeFolder};
 use util::nodemap::{FnvHashMap, FnvHashSet};
 
 use std::cmp;
@@ -100,9 +103,10 @@ pub fn report_projection_error<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
     }
 }
 
-fn report_on_unimplemented<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
+fn on_unimplemented_note<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
-                                     trait_ref: &TraitRef<'tcx>,
+                                   trait_ref: ty::PolyTraitRef<'tcx>,
-                                     span: Span) -> Option<String> {
+                                   span: Span) -> Option<String> {
+    let trait_ref = trait_ref.skip_binder();
     let def_id = trait_ref.def_id;
     let mut report = None;
     for item in infcx.tcx.get_attrs(def_id).iter() {
@@ -357,14 +361,20 @@ pub fn report_selection_error<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
                             let trait_ref = trait_predicate.to_poly_trait_ref();
                             let mut err = struct_span_err!(
                                 infcx.tcx.sess, obligation.cause.span, E0277,
-                                "the trait `{}` is not implemented for the type `{}`",
+                                "the predicate `{}` is not satisfied",
-                                trait_ref, trait_ref.self_ty());
+                                trait_ref.to_predicate());
 
-                            // Check if it has a custom "#[rustc_on_unimplemented]"
+                            // Try to report a good error message.
-                            // error message, report with that message if it does
+
-                            let custom_note = report_on_unimplemented(infcx, &trait_ref.0,
+                            if !trait_ref.has_infer_types() &&
-                                                                      obligation.cause.span);
+                                predicate_can_apply(infcx, trait_ref)
-                            if let Some(s) = custom_note {
+                            {
+                                err.fileline_help(obligation.cause.span, &format!(
+                                    "consider adding a `where {}` bound",
+                                    trait_ref.to_predicate()
+                                    ));
+                            } else if let Some(s) = on_unimplemented_note(infcx, trait_ref,
+                                                                          obligation.cause.span) {
                                 err.fileline_note(obligation.cause.span, &s);
                             } else {
                                 let simp = fast_reject::simplify_type(infcx.tcx,
@@ -644,6 +654,55 @@ pub fn maybe_report_ambiguity<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
     }
 }
 
+/// Returns whether the trait predicate may apply for *some* assignment
+/// to the type parameters.
+fn predicate_can_apply<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
+                                 pred: ty::PolyTraitRef<'tcx>)
+                                 -> bool
+{
+    struct ParamToVarFolder<'a, 'tcx: 'a> {
+        infcx: &'a InferCtxt<'a, 'tcx>,
+        var_map: FnvHashMap<Ty<'tcx>, Ty<'tcx>>
+    }
+
+    impl<'a, 'tcx> TypeFolder<'tcx> for ParamToVarFolder<'a, 'tcx>
+    {
+        fn tcx(&self) -> &TyCtxt<'tcx> { self.infcx.tcx }
+
+        fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
+            if let ty::TyParam(..) = ty.sty {
+                let infcx = self.infcx;
+                self.var_map.entry(ty).or_insert_with(|| infcx.next_ty_var())
+            } else {
+                ty.super_fold_with(self)
+            }
+        }
+    }
+
+    infcx.probe(|_| {
+        let mut selcx = SelectionContext::new(infcx);
+
+        let cleaned_pred = pred.fold_with(&mut ParamToVarFolder {
+            infcx: infcx,
+            var_map: FnvHashMap()
+        });
+
+        let cleaned_pred = super::project::normalize(
+            &mut selcx,
+            ObligationCause::dummy(),
+            &cleaned_pred
+        ).value;
+
+        let obligation = Obligation::new(
+            ObligationCause::dummy(),
+            cleaned_pred.to_predicate()
+        );
+
+        selcx.evaluate_obligation(&obligation)
+    })
+}
+
+
 fn need_type_info<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
                             span: Span,
                             ty: Ty<'tcx>)

src/test/compile-fail/associated-types-ICE-when-projecting-out-of-err.rs

@@ -31,5 +31,5 @@ trait Add<RHS=Self> {
 fn ice<A>(a: A) {
     let r = loop {};
     r = r + a;
-    //~^ ERROR not implemented
+    //~^ ERROR E0277
 }

src/test/compile-fail/associated-types-bound-failure.rs

@@ -24,7 +24,7 @@ pub trait GetToInt
 fn foo<G>(g: G) -> isize
     where G : GetToInt
 {
-    ToInt::to_int(&g.get()) //~ ERROR not implemented
+    ToInt::to_int(&g.get()) //~ ERROR E0277
 }
 
 fn bar<G : GetToInt>(g: G) -> isize

src/test/compile-fail/associated-types-for-unimpl-trait.rs

@@ -15,7 +15,7 @@ trait Get {
 
 trait Other {
     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-    //~^ ERROR the trait `Get` is not implemented for the type `Self`
+    //~^ ERROR the predicate `Self : Get` is not satisfied
 }
 
 fn main() {

src/test/compile-fail/associated-types-invalid-trait-ref-issue-18865.rs

@@ -18,7 +18,7 @@ trait Foo<T> {
 
 fn f<T:Foo<isize>>(t: &T) {
     let u: <T as Foo<usize>>::Bar = t.get_bar();
-    //~^ ERROR the trait `Foo<usize>` is not implemented for the type `T`
+    //~^ ERROR the predicate `T : Foo<usize>` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/associated-types-no-suitable-bound.rs

@@ -19,7 +19,7 @@ struct Struct {
 
 impl Struct {
     fn uhoh<T>(foo: <T as Get>::Value) {}
-    //~^ ERROR the trait `Get` is not implemented for the type `T`
+    //~^ ERROR the predicate `T : Get` is not satisfied
 }
 
 fn main() {

src/test/compile-fail/associated-types-no-suitable-supertrait-2.rs

@@ -25,7 +25,7 @@ trait Get {
 
 trait Other {
     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-    //~^ ERROR the trait `Get` is not implemented for the type `Self`
+    //~^ ERROR the predicate `Self : Get` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/associated-types-no-suitable-supertrait.rs

@@ -25,12 +25,12 @@ trait Get {
 
 trait Other {
     fn uhoh<U:Get>(&self, foo: U, bar: <Self as Get>::Value) {}
-    //~^ ERROR the trait `Get` is not implemented for the type `Self`
+    //~^ ERROR the predicate `Self : Get` is not satisfied
 }
 
 impl<T:Get> Other for T {
     fn uhoh<U:Get>(&self, foo: U, bar: <(T, U) as Get>::Value) {}
-    //~^ ERROR the trait `Get` is not implemented for the type `(T, U)`
+    //~^ ERROR the predicate `(T, U) : Get` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/associated-types-path-2.rs

@@ -38,12 +38,12 @@ pub fn f1_int_uint() {
 
 pub fn f1_uint_uint() {
     f1(2u32, 4u32);
-    //~^ ERROR the trait `Foo` is not implemented
+    //~^ ERROR `u32 : Foo` is not satisfied
 }
 
 pub fn f1_uint_int() {
     f1(2u32, 4i32);
-    //~^ ERROR the trait `Foo` is not implemented
+    //~^ ERROR `u32 : Foo` is not satisfied
 }
 
 pub fn f2_int() {

src/test/compile-fail/associated-types-unsized.rs

@@ -14,7 +14,7 @@ trait Get {
 }
 
 fn foo<T:Get>(t: T) {
-    let x = t.get(); //~ ERROR the trait `std::marker::Sized` is not implemented
+    let x = t.get(); //~ ERROR `<T as Get>::Value : std::marker::Sized` is not
 }
 
 fn main() {

src/test/compile-fail/bad-method-typaram-kind.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 fn foo<T:'static>() {
-    1.bar::<T>(); //~ ERROR `std::marker::Send` is not implemented
+    1.bar::<T>(); //~ ERROR `T : std::marker::Send` is not satisfied
 }
 
 trait bar {

src/test/compile-fail/bad-sized.rs

@@ -12,7 +12,7 @@ trait Trait {}
 
 pub fn main() {
     let x: Vec<Trait + Sized> = Vec::new();
-    //~^ ERROR the trait `std::marker::Sized` is not implemented
+    //~^ ERROR `Trait + Sized : std::marker::Sized` is not satisfied
-    //~| ERROR the trait `std::marker::Sized` is not implemented
+    //~| ERROR `Trait + Sized : std::marker::Sized` is not satisfied
-    //~| ERROR the trait `std::marker::Sized` is not implemented
+    //~| ERROR `Trait + Sized : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/builtin-superkinds-double-superkind.rs

@@ -13,9 +13,9 @@
 
 trait Foo : Send+Sync { }
 
-impl <T: Sync+'static> Foo for (T,) { } //~ ERROR the trait `std::marker::Send` is not implemented
+impl <T: Sync+'static> Foo for (T,) { } //~ ERROR `T : std::marker::Send` is not satisfied
 
-impl <T: Send> Foo for (T,T) { } //~ ERROR the trait `std::marker::Sync` is not implemented
+impl <T: Send> Foo for (T,T) { } //~ ERROR `T : std::marker::Sync` is not satisfied
 
 impl <T: Send+Sync> Foo for (T,T,T) { } // (ok)
 

src/test/compile-fail/builtin-superkinds-in-metadata.rs

@@ -22,6 +22,6 @@ struct X<T>(T);
 impl <T:Sync> RequiresShare for X<T> { }
 
 impl <T:Sync+'static> RequiresRequiresShareAndSend for X<T> { }
-//~^ ERROR the trait `std::marker::Send` is not implemented
+//~^ ERROR `T : std::marker::Send` is not satisfied
 
 fn main() { }

src/test/compile-fail/builtin-superkinds-simple.rs

@@ -14,6 +14,6 @@
 trait Foo : Send { }
 
 impl Foo for std::rc::Rc<i8> { }
-//~^ ERROR the trait `std::marker::Send` is not implemented
+//~^ ERROR `std::rc::Rc<i8> : std::marker::Send` is not satisfied
 
 fn main() { }

src/test/compile-fail/builtin-superkinds-typaram-not-send.rs

@@ -12,6 +12,6 @@
 
 trait Foo : Send { }
 
-impl <T: Sync+'static> Foo for T { } //~ ERROR the trait `std::marker::Send` is not implemented
+impl <T: Sync+'static> Foo for T { } //~ ERROR `T : std::marker::Send` is not satisfied
 
 fn main() { }

src/test/compile-fail/cast-rfc0401.rs

@@ -91,7 +91,7 @@ fn main()
     let _ = 42usize as *const [u8]; //~ ERROR casting
     let _ = v as *const [u8]; //~ ERROR cannot cast
     let _ = fat_v as *const Foo;
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `[u8]`
+    //~^ ERROR the predicate `[u8] : std::marker::Sized` is not satisfied
     //~^^ HELP run `rustc --explain E0277` to see a detailed explanation
     //~^^^ NOTE `[u8]` does not have a constant size known at compile-time
     //~^^^^ NOTE required for the cast to the object type `Foo`
@@ -106,7 +106,7 @@ fn main()
 
     let a : *const str = "hello";
     let _ = a as *const Foo;
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `str`
+    //~^ ERROR the predicate `str : std::marker::Sized` is not satisfied
     //~^^ HELP run `rustc --explain E0277` to see a detailed explanation
     //~^^^ NOTE `str` does not have a constant size known at compile-time
     //~^^^^ NOTE required for the cast to the object type `Foo`

src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs

@@ -13,7 +13,7 @@ struct X<F> where F: FnOnce() + 'static + Send {
 }
 
 fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
-    //~^ ERROR the trait `std::marker::Send` is not implemented for the type
+    //~^ ERROR `F : std::marker::Send` is not satisfied
     return X { field: blk };
 }
 

src/test/compile-fail/closure-bounds-subtype.rs

@@ -21,7 +21,7 @@ fn give_any<F>(f: F) where F: FnOnce() {
 
 fn give_owned<F>(f: F) where F: FnOnce() + Send {
     take_any(f);
-    take_const_owned(f); //~ ERROR the trait `std::marker::Sync` is not implemented for the type
+    take_const_owned(f); //~ ERROR `F : std::marker::Sync` is not satisfied
 }
 
 fn main() {}

src/test/compile-fail/cross-fn-cache-hole.rs

@@ -23,7 +23,7 @@ trait Bar<X> { }
 
 // We don't always check where clauses for sanity, but in this case
 // wfcheck does report an error here:
-fn vacuous<A>() //~ ERROR the trait `Bar<u32>` is not implemented for the type `i32`
+fn vacuous<A>() //~ ERROR the predicate `i32 : Bar<u32>` is not satisfied
     where i32: Foo<u32, A>
 {
     // ... the original intention was to check that we don't use that

src/test/compile-fail/deriving-no-inner-impl-error-message.rs

@@ -18,7 +18,7 @@ struct E {
 #[derive(Clone)]
 struct C {
     x: NoCloneOrEq
-    //~^ ERROR the trait `std::clone::Clone` is not implemented for the type `NoCloneOrEq`
+    //~^ ERROR `NoCloneOrEq : std::clone::Clone` is not satisfied
 }
 
 

src/test/compile-fail/deriving-span-Default-struct.rs

@@ -17,7 +17,7 @@ struct Error;
 
 #[derive(Default)]
 struct Struct {
-    x: Error //~ ERROR `std::default::Default` is not implemented
+    x: Error //~ ERROR `Error : std::default::Default` is not satisfied
 }
 
 fn main() {}

src/test/compile-fail/destructure-trait-ref.rs

@@ -35,7 +35,7 @@ fn main() {
     // n == m
     let &x = &1isize as &T;      //~ ERROR type `&T` cannot be dereferenced
     let &&x = &(&1isize as &T);  //~ ERROR type `&T` cannot be dereferenced
-    let box x = box 1isize as Box<T>; //~ ERROR the trait `std::marker::Sized` is not implemented
+    let box x = box 1isize as Box<T>; //~ ERROR `T : std::marker::Sized` is not satisfied
 
     // n > m
     let &&x = &1isize as &T;

src/test/compile-fail/dst-bad-assign-2.rs

@@ -44,5 +44,5 @@ pub fn main() {
     // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
     let z: Box<ToBar> = Box::new(Bar1 {f: 36});
     f5.ptr = *z;
-    //~^ ERROR the trait `std::marker::Sized` is not implemented
+    //~^ ERROR `ToBar : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/dst-bad-assign.rs

@@ -49,5 +49,5 @@ pub fn main() {
     //~| found `Bar1`
     //~| expected trait ToBar
     //~| found struct `Bar1`
-    //~| ERROR the trait `std::marker::Sized` is not implemented for the type `ToBar`
+    //~| ERROR `ToBar : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/dst-bad-coerce1.rs

@@ -28,5 +28,5 @@ pub fn main() {
     let f1 = Fat { ptr: Foo };
     let f2: &Fat<Foo> = &f1;
     let f3: &Fat<Bar> = f2;
-    //~^ ERROR the trait `Bar` is not implemented for the type `Foo`
+    //~^ ERROR `Foo : Bar` is not satisfied
 }

src/test/compile-fail/dst-bad-deep.rs

@@ -21,5 +21,5 @@ pub fn main() {
     let f: Fat<[isize; 3]> = Fat { ptr: [5, 6, 7] };
     let g: &Fat<[isize]> = &f;
     let h: &Fat<Fat<[isize]>> = &Fat { ptr: *g };
-    //~^ ERROR the trait `std::marker::Sized` is not implemented
+    //~^ ERROR `[isize] : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/dst-object-from-unsized-type.rs

@@ -16,22 +16,22 @@ impl Foo for [u8] {}
 
 fn test1<T: ?Sized + Foo>(t: &T) {
     let u: &Foo = t;
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `T`
+    //~^ ERROR `T : std::marker::Sized` is not satisfied
 }
 
 fn test2<T: ?Sized + Foo>(t: &T) {
     let v: &Foo = t as &Foo;
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `T`
+    //~^ ERROR `T : std::marker::Sized` is not satisfied
 }
 
 fn test3() {
     let _: &[&Foo] = &["hi"];
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `str`
+    //~^ ERROR `str : std::marker::Sized` is not satisfied
 }
 
 fn test4(x: &[u8]) {
     let _: &Foo = x as &Foo;
-    //~^ ERROR `std::marker::Sized` is not implemented for the type `[u8]`
+    //~^ ERROR `[u8] : std::marker::Sized` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/dst-sized-trait-param.rs

@@ -15,9 +15,9 @@
 trait Foo<T> : Sized { fn take(self, x: &T) { } } // Note: T is sized
 
 impl Foo<[isize]> for usize { }
-//~^ ERROR the trait `std::marker::Sized` is not implemented for the type `[isize]`
+//~^ ERROR `[isize] : std::marker::Sized` is not satisfied
 
 impl Foo<isize> for [usize] { }
-//~^ ERROR the trait `std::marker::Sized` is not implemented for the type `[usize]`
+//~^ ERROR `[usize] : std::marker::Sized` is not satisfied
 
 pub fn main() { }

src/test/compile-fail/error-should-say-copy-not-pod.rs

@@ -13,5 +13,5 @@
 fn check_bound<T:Copy>(_: T) {}
 
 fn main() {
-    check_bound("nocopy".to_string()); //~ ERROR the trait `std::marker::Copy` is not implemented
+    check_bound("nocopy".to_string()); //~ ERROR : std::marker::Copy` is not satisfied
 }

src/test/compile-fail/extern-wrong-value-type.rs

@@ -17,6 +17,6 @@ fn main() {
     // extern functions are extern "C" fn
     let _x: extern "C" fn() = f; // OK
     is_fn(f);
-    //~^ ERROR the trait `std::ops::Fn<()>` is not implemented for the type `extern "C" fn()
+    //~^ ERROR `extern "C" fn() {f} : std::ops::Fn<()>` is not satisfied
-    //~| ERROR the trait `std::ops::FnOnce<()>` is not implemented for the type `extern "C" fn()
+    //~| ERROR `extern "C" fn() {f} : std::ops::FnOnce<()>` is not satisfied
 }

src/test/compile-fail/fn-trait-formatting.rs

@@ -34,6 +34,6 @@ fn main() {
     //~| found box
 
     needs_fn(1);
-    //~^ ERROR `std::ops::Fn<(isize,)>`
+    //~^ ERROR : std::ops::Fn<(isize,)>`
-    //~| ERROR `std::ops::FnOnce<(isize,)>`
+    //~| ERROR : std::ops::FnOnce<(isize,)>`
 }

src/test/compile-fail/for-loop-bogosity.rs

@@ -24,7 +24,7 @@ pub fn main() {
         x: 1,
         y: 2,
     };
-    for x in bogus { //~ ERROR `std::iter::Iterator` is not implemented for the type `MyStruct`
+    for x in bogus { //~ ERROR `MyStruct : std::iter::Iterator`
         drop(x);
     }
 }

src/test/compile-fail/hrtb-conflate-regions.rs

@@ -35,6 +35,6 @@ impl<'a> Foo<(&'a isize, &'a isize)> for SomeStruct
 }
 
 fn a() { want_foo1::<SomeStruct>(); } // OK -- foo wants just one region
-fn b() { want_foo2::<SomeStruct>(); } //~ ERROR not implemented
+fn b() { want_foo2::<SomeStruct>(); } //~ ERROR E0277
 
 fn main() { }

src/test/compile-fail/hrtb-higher-ranker-supertraits-transitive.rs

@@ -54,7 +54,7 @@ fn want_qux<B>(b: &B)
     where B : Qux
 {
     want_foo_for_any_tcx(b);
-    want_bar_for_any_ccx(b); //~ ERROR not implemented
+    want_bar_for_any_ccx(b); //~ ERROR E0277
 }
 
 fn main() {}

src/test/compile-fail/hrtb-higher-ranker-supertraits.rs

@@ -25,7 +25,7 @@ fn want_foo_for_some_tcx<'x,F>(f: &'x F)
     where F : Foo<'x>
 {
     want_foo_for_some_tcx(f);
-    want_foo_for_any_tcx(f); //~ ERROR not implemented
+    want_foo_for_any_tcx(f); //~ ERROR E0277
 }
 
 fn want_foo_for_any_tcx<F>(f: &F)
@@ -42,7 +42,7 @@ fn want_bar_for_some_ccx<'x,B>(b: &B)
     want_foo_for_any_tcx(b);
 
     want_bar_for_some_ccx(b);
-    want_bar_for_any_ccx(b); //~ ERROR not implemented
+    want_bar_for_any_ccx(b); //~ ERROR E0277
 }
 
 fn want_bar_for_any_ccx<B>(b: &B)

src/test/compile-fail/hrtb-just-for-static.rs

@@ -31,7 +31,7 @@ fn give_any() {
 struct StaticInt;
 impl Foo<&'static isize> for StaticInt { }
 fn give_static() {
-    want_hrtb::<StaticInt>() //~ ERROR `for<'a> Foo<&'a isize>` is not implemented
+    want_hrtb::<StaticInt>() //~ ERROR `for<'a> StaticInt : Foo<&'a isize>` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/hrtb-perfect-forwarding.rs

@@ -53,7 +53,7 @@ fn foo_hrtb_bar_not<'b,T>(mut t: T)
     // be implemented. Thus to satisfy `&mut T : for<'a> Foo<&'a
     // isize>`, we require `T : for<'a> Bar<&'a isize>`, but the where
     // clause only specifies `T : Bar<&'b isize>`.
-    foo_hrtb_bar_not(&mut t); //~ ERROR `for<'a> Bar<&'a isize>` is not implemented for the type `T`
+    foo_hrtb_bar_not(&mut t); //~ ERROR `for<'a> T : Bar<&'a isize>` is not satisfied
 }
 
 fn foo_hrtb_bar_hrtb<T>(mut t: T)

src/test/compile-fail/ifmt-unimpl.rs

@@ -10,5 +10,5 @@
 
 fn main() {
     format!("{:X}", "3");
-    //~^ ERROR: the trait `std::fmt::UpperHex` is not implemented
+    //~^ ERROR: `str : std::fmt::UpperHex` is not satisfied
 }

src/test/compile-fail/impl-bounds-checking.rs

@@ -17,7 +17,7 @@ trait Getter<T: Clone2> {
     fn get(&self) -> T;
 }
 
-impl Getter<isize> for isize { //~ ERROR the trait `Clone2` is not implemented
+impl Getter<isize> for isize { //~ ERROR `isize : Clone2` is not satisfied
     fn get(&self) -> isize { *self }
 }
 

src/test/compile-fail/indexing-requires-a-uint.rs

@@ -13,7 +13,7 @@
 
 fn main() {
     fn bar<T>(_: T) {}
-    [0][0u8]; //~ ERROR: the trait `std::ops::Index<u8>` is not implemented
+    [0][0u8]; //~ ERROR: `[_] : std::ops::Index<u8>` is not satisfied
 
     [0][0]; // should infer to be a usize
 

src/test/compile-fail/integral-indexing.rs

@@ -13,14 +13,14 @@ pub fn main() {
     let s: String = "abcdef".to_string();
     v[3_usize];
     v[3];
-    v[3u8];  //~ERROR the trait `std::ops::Index<u8>` is not implemented
+    v[3u8];  //~ERROR : std::ops::Index<u8>` is not satisfied
-    v[3i8];  //~ERROR the trait `std::ops::Index<i8>` is not implemented
+    v[3i8];  //~ERROR : std::ops::Index<i8>` is not satisfied
-    v[3u32]; //~ERROR the trait `std::ops::Index<u32>` is not implemented
+    v[3u32]; //~ERROR : std::ops::Index<u32>` is not satisfied
-    v[3i32]; //~ERROR the trait `std::ops::Index<i32>` is not implemented
+    v[3i32]; //~ERROR : std::ops::Index<i32>` is not satisfied
     s.as_bytes()[3_usize];
     s.as_bytes()[3];
-    s.as_bytes()[3u8];  //~ERROR the trait `std::ops::Index<u8>` is not implemented
+    s.as_bytes()[3u8];  //~ERROR : std::ops::Index<u8>` is not satisfied
-    s.as_bytes()[3i8];  //~ERROR the trait `std::ops::Index<i8>` is not implemented
+    s.as_bytes()[3i8];  //~ERROR : std::ops::Index<i8>` is not satisfied
-    s.as_bytes()[3u32]; //~ERROR the trait `std::ops::Index<u32>` is not implemented
+    s.as_bytes()[3u32]; //~ERROR : std::ops::Index<u32>` is not satisfied
-    s.as_bytes()[3i32]; //~ERROR the trait `std::ops::Index<i32>` is not implemented
+    s.as_bytes()[3i32]; //~ERROR : std::ops::Index<i32>` is not satisfied
 }

src/test/compile-fail/issue-14084.rs

@@ -13,5 +13,5 @@
 
 fn main() {
     () <- 0;
-    //~^ ERROR: the trait `std::ops::Placer<_>` is not implemented
+    //~^ ERROR: `() : std::ops::Placer<_>` is not satisfied
 }

src/test/compile-fail/issue-14366.rs

@@ -10,5 +10,5 @@
 
 fn main() {
     let _x = "test" as &::std::any::Any;
-//~^ ERROR the trait `std::marker::Sized` is not implemented for the type `str`
+//~^ ERROR `str : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/issue-15756.rs

@@ -15,7 +15,7 @@ fn dft_iter<'a, T>(arg1: Chunks<'a,T>, arg2: ChunksMut<'a,T>)
 {
     for
     &mut something
-//~^ ERROR the trait `std::marker::Sized` is not implemented for the type `[T]`
+//~^ ERROR `[T] : std::marker::Sized` is not satisfied
     in arg2
     {
     }

src/test/compile-fail/issue-16538.rs

@@ -19,7 +19,7 @@ mod Y {
 }
 
 static foo: *const Y::X = Y::foo(Y::x as *const Y::X);
-//~^ ERROR the trait `std::marker::Sync` is not implemented for the type
+//~^ ERROR `*const usize : std::marker::Sync` is not satisfied
 //~| ERROR cannot refer to other statics by value, use the address-of operator or a constant instead
 //~| ERROR E0015
 

src/test/compile-fail/issue-17651.rs

@@ -14,5 +14,5 @@
 fn main() {
     // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
     (|| Box::new(*(&[0][..])))();
-    //~^ ERROR the trait `std::marker::Sized` is not implemented for the type `[_]`
+    //~^ ERROR `[_] : std::marker::Sized` is not satisfied
 }

src/test/compile-fail/issue-17718-static-sync.rs

@@ -17,6 +17,6 @@ impl !Sync for Foo {}
 
 static FOO: usize = 3;
 static BAR: Foo = Foo;
-//~^ ERROR: the trait `std::marker::Sync` is not implemented
+//~^ ERROR: `Foo : std::marker::Sync` is not satisfied
 
 fn main() {}

src/test/compile-fail/issue-18107.rs

@@ -12,7 +12,7 @@ pub trait AbstractRenderer {}
 
 fn _create_render(_: &()) ->
     AbstractRenderer
-//~^ ERROR: the trait `std::marker::Sized` is not implemented
+//~^ ERROR: `AbstractRenderer + 'static : std::marker::Sized` is not satisfied
 {
     match 0 {
         _ => unimplemented!()

src/test/compile-fail/issue-18611.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 fn add_state(op: <isize as HasState>::State) {
-//~^ ERROR the trait `HasState` is not implemented for the type `isize`
+//~^ ERROR `isize : HasState` is not satisfied
 }
 
 trait HasState {

src/test/compile-fail/issue-18919.rs

@@ -11,7 +11,7 @@
 type FuncType<'f> = Fn(&isize) -> isize + 'f;
 
 fn ho_func(f: Option<FuncType>) {
-    //~^ ERROR: the trait `std::marker::Sized` is not implemented for the type
+    //~^ ERROR: `for<'r> std::ops::Fn(&'r isize) -> isize : std::marker::Sized` is not satisfied
 }
 
 fn main() {}

src/test/compile-fail/issue-1920-1.rs

@@ -18,5 +18,5 @@ fn assert_clone<T>() where T : Clone { }
 
 fn main() {
     assert_clone::<foo::core::sync::atomic::AtomicBool>();
-    //~^ ERROR the trait `foo::core::clone::Clone` is not implemented for the type `foo::core::
+    //~^ ERROR `foo::core::sync::atomic::AtomicBool : foo::core::clone::Clone` is not satisfied
 }

src/test/compile-fail/issue-1920-2.rs

@@ -16,5 +16,5 @@ fn assert_clone<T>() where T : Clone { }
 
 fn main() {
     assert_clone::<bar::sync::atomic::AtomicBool>();
-    //~^ ERROR the trait `bar::clone::Clone` is not implemented for the type `bar::sync::atomic::
+    //~^ ERROR `bar::sync::atomic::AtomicBool : bar::clone::Clone` is not satisfied
 }

src/test/compile-fail/issue-1920-3.rs

@@ -20,5 +20,5 @@ fn assert_clone<T>() where T : Clone { }
 
 fn main() {
     assert_clone::<foo::core::sync::atomic::AtomicBool>();
-    //~^ ERROR the trait `core::clone::Clone` is not implemented for the type `core::sync::atomic::
+    //~^ ERROR `core::sync::atomic::AtomicBool : core::clone::Clone` is not satisfied
 }

src/test/compile-fail/issue-20005.rs

@@ -15,7 +15,7 @@ trait From<Src> {
 }
 
 trait To {
-    fn to<Dst>(  //~ ERROR the trait `std::marker::Sized` is not implemented
+    fn to<Dst>(  //~ ERROR `Self : std::marker::Sized` is not satisfied
         self
     ) -> <Dst as From<Self>>::Result where Dst: From<Self> {
         From::from(self)

src/test/compile-fail/issue-20162.rs

@@ -13,5 +13,5 @@ struct X { x: i32 }
 fn main() {
     let mut b: Vec<X> = vec![];
     b.sort();
-    //~^ ERROR the trait `std::cmp::Ord` is not implemented for the type `X`
+    //~^ ERROR `X : std::cmp::Ord` is not satisfied
 }

src/test/compile-fail/issue-20605.rs

@@ -10,7 +10,7 @@
 
 fn changer<'a>(mut things: Box<Iterator<Item=&'a mut u8>>) {
     for item in *things { *item = 0 }
-//~^ ERROR the trait `std::marker::Sized` is not implemented for the type `std::iter::Iterator
+//~^ ERROR `std::iter::Iterator<Item=&mut u8> : std::marker::Sized` is not satisfied
 }
 
 fn main() {}

src/test/compile-fail/issue-21160.rs

@@ -16,6 +16,6 @@ impl Bar {
 
 #[derive(Hash)]
 struct Foo(Bar);
-//~^ error: the trait `std::hash::Hash` is not implemented for the type `Bar`
+//~^ error: `Bar : std::hash::Hash` is not satisfied
 
 fn main() {}

src/test/compile-fail/issue-21659-show-relevant-trait-impls-1.rs

@@ -32,7 +32,7 @@ fn main() {
     let f1 = Bar;
 
     f1.foo(1usize);
-    //~^ error: the trait `Foo<usize>` is not implemented for the type `Bar`
+    //~^ error: the predicate `Bar : Foo<usize>` is not satisfied
     //~| help: the following implementations were found:
     //~| help:   <Bar as Foo<i32>>
     //~| help:   <Bar as Foo<u8>>

src/test/compile-fail/issue-21659-show-relevant-trait-impls-2.rs

@@ -36,7 +36,7 @@ fn main() {
     let f1 = Bar;
 
     f1.foo(1usize);
-    //~^ error: the trait `Foo<usize>` is not implemented for the type `Bar`
+    //~^ error: the predicate `Bar : Foo<usize>` is not satisfied
     //~| help: the following implementations were found:
     //~| help:   <Bar as Foo<i8>>
     //~| help:   <Bar as Foo<i16>>

src/test/compile-fail/issue-21763.rs

@@ -17,5 +17,5 @@ fn foo<T: Send>() {}
 
 fn main() {
     foo::<HashMap<Rc<()>, Rc<()>>>();
-    //~^ ERROR: the trait `std::marker::Send` is not implemented for the type `std::rc::Rc<()>`
+    //~^ ERROR: `std::rc::Rc<()> : std::marker::Send` is not satisfied
 }

src/test/compile-fail/issue-22034.rs

@@ -14,7 +14,7 @@ fn main() {
     let ptr: *mut () = 0 as *mut _;
     let _: &mut Fn() = unsafe {
         &mut *(ptr as *mut Fn())
-        //~^ ERROR the trait `std::ops::Fn<()>` is not implemented
+        //~^ ERROR `() : std::ops::Fn<()>` is not satisfied
-        //~| ERROR the trait `std::ops::FnOnce<()>` is not implemented
+        //~| ERROR `() : std::ops::FnOnce<()>` is not satisfied
     };
 }

src/test/compile-fail/issue-22645.rs

@@ -22,6 +22,6 @@ impl<RHS: Scalar> Add <RHS> for Bob {
 
 fn main() {
   let b = Bob + 3.5;
-  b + 3 //~ ERROR: is not implemented
+  b + 3 //~ ERROR E0277
   //~^ ERROR: mismatched types
 }

src/test/compile-fail/issue-25076.rs

@@ -17,5 +17,5 @@ fn do_fold<B, F: InOut<B, Out=B>>(init: B, f: F) {}
 fn bot<T>() -> T { loop {} }
 
 fn main() {
-    do_fold(bot(), ()); //~ ERROR is not implemented for the type `()`
+    do_fold(bot(), ()); //~ ERROR `() : InOut<_>` is not satisfied
 }

src/test/compile-fail/issue-28098.rs

@@ -10,13 +10,13 @@
 
 fn main() {
     let _ = Iterator::next(&mut ());
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `() : std::iter::Iterator` is not satisfied
 
     for _ in false {}
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `bool : std::iter::Iterator` is not satisfied
 
     let _ = Iterator::next(&mut ());
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `() : std::iter::Iterator` is not satisfied
 
     other()
 }
@@ -25,11 +25,11 @@ pub fn other() {
     // check errors are still reported globally
 
     let _ = Iterator::next(&mut ());
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `() : std::iter::Iterator` is not satisfied
 
     let _ = Iterator::next(&mut ());
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `() : std::iter::Iterator` is not satisfied
 
     for _ in false {}
-    //~^ ERROR the trait `std::iter::Iterator` is not implemented
+    //~^ ERROR `bool : std::iter::Iterator` is not satisfied
 }

src/test/compile-fail/issue-5035-2.rs

@@ -11,6 +11,6 @@
 trait I {}
 type K = I+'static;
 
-fn foo(_x: K) {} //~ ERROR: the trait `std::marker::Sized` is not implemented
+fn foo(_x: K) {} //~ ERROR: `I + 'static : std::marker::Sized` is not satisfied
 
 fn main() {}

src/test/compile-fail/issue-5883.rs

@@ -15,8 +15,8 @@ struct Struct {
 }
 
 fn new_struct(r: A+'static)
-    -> Struct { //~^  ERROR the trait `std::marker::Sized` is not implemented
+    -> Struct { //~^  ERROR `A + 'static : std::marker::Sized` is not satisfied
-    //~^ ERROR the trait `std::marker::Sized` is not implemented
+    //~^ ERROR `A + 'static : std::marker::Sized` is not satisfied
     Struct { r: r }
 }
 

src/test/compile-fail/issue-7013.rs

@@ -34,5 +34,5 @@ struct A {
 
 fn main() {
     let a = A {v: box B{v: None} as Box<Foo+Send>};
-    //~^ ERROR the trait `std::marker::Send` is not implemented
+    //~^ ERROR `std::rc::Rc<std::cell::RefCell<A>> : std::marker::Send` is not satisfied
 }

src/test/compile-fail/issue-7364.rs

@@ -16,6 +16,6 @@ use std::cell::RefCell;
 // Regression test for issue 7364
 static boxed: Box<RefCell<isize>> = box RefCell::new(0);
 //~^ ERROR allocations are not allowed in statics
-//~| ERROR the trait `std::marker::Sync` is not implemented for the type
+//~| ERROR `std::cell::RefCell<isize> : std::marker::Sync` is not satisfied
 
 fn main() { }

src/test/compile-fail/kindck-copy.rs

@@ -34,14 +34,14 @@ fn test<'a,T,U:Copy>(_: &'a isize) {
     assert_copy::<&'a [isize]>();
 
     // ...unless they are mutable
-    assert_copy::<&'static mut isize>(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<&'static mut isize>(); //~ ERROR : std::marker::Copy` is not satisfied
-    assert_copy::<&'a mut isize>();  //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<&'a mut isize>();  //~ ERROR : std::marker::Copy` is not satisfied
 
     // boxes are not ok
-    assert_copy::<Box<isize>>();   //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Box<isize>>();   //~ ERROR : std::marker::Copy` is not satisfied
-    assert_copy::<String>();   //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<String>();   //~ ERROR : std::marker::Copy` is not satisfied
-    assert_copy::<Vec<isize> >(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Vec<isize> >(); //~ ERROR : std::marker::Copy` is not satisfied
-    assert_copy::<Box<&'a mut isize>>(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Box<&'a mut isize>>(); //~ ERROR : std::marker::Copy` is not satisfied
 
     // borrowed object types are generally ok
     assert_copy::<&'a Dummy>();
@@ -49,11 +49,11 @@ fn test<'a,T,U:Copy>(_: &'a isize) {
     assert_copy::<&'static (Dummy+Copy)>();
 
     // owned object types are not ok
-    assert_copy::<Box<Dummy>>(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Box<Dummy>>(); //~ ERROR : std::marker::Copy` is not satisfied
-    assert_copy::<Box<Dummy+Copy>>(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Box<Dummy+Copy>>(); //~ ERROR : std::marker::Copy` is not satisfied
 
     // mutable object types are not ok
-    assert_copy::<&'a mut (Dummy+Copy)>();  //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<&'a mut (Dummy+Copy)>();  //~ ERROR : std::marker::Copy` is not satisfied
 
     // unsafe ptrs are ok
     assert_copy::<*const isize>();
@@ -71,10 +71,10 @@ fn test<'a,T,U:Copy>(_: &'a isize) {
     assert_copy::<MyStruct>();
 
     // structs containing non-POD are not ok
-    assert_copy::<MyNoncopyStruct>(); //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<MyNoncopyStruct>(); //~ ERROR : std::marker::Copy` is not satisfied
 
     // ref counted types are not ok
-    assert_copy::<Rc<isize>>();   //~ ERROR `std::marker::Copy` is not implemented
+    assert_copy::<Rc<isize>>();   //~ ERROR : std::marker::Copy` is not satisfied
 }
 
 pub fn main() {

src/test/compile-fail/kindck-impl-type-params-2.rs

@@ -21,5 +21,5 @@ fn take_param<T:Foo>(foo: &T) { }
 fn main() {
     let x: Box<_> = box 3;
     take_param(&x);
-    //~^ ERROR the trait `std::marker::Copy` is not implemented
+    //~^ ERROR `Box<_> : std::marker::Copy` is not satisfied
 }

src/test/compile-fail/kindck-impl-type-params.rs

@@ -26,13 +26,13 @@ impl<T: Send + Copy + 'static> Gettable<T> for S<T> {}
 fn f<T>(val: T) {
     let t: S<T> = S(marker::PhantomData);
     let a = &t as &Gettable<T>;
-    //~^ ERROR the trait `std::marker::Send` is not implemented
+    //~^ ERROR : std::marker::Send` is not satisfied
 }
 
 fn g<T>(val: T) {
     let t: S<T> = S(marker::PhantomData);
     let a: &Gettable<T> = &t;
-    //~^ ERROR the trait `std::marker::Send` is not implemented
+    //~^ ERROR : std::marker::Send` is not satisfied
 }
 
 fn foo<'a>() {
@@ -44,7 +44,7 @@ fn foo<'a>() {
 fn foo2<'a>() {
     let t: Box<S<String>> = box S(marker::PhantomData);
     let a = t as Box<Gettable<String>>;
-    //~^ ERROR the trait `std::marker::Copy` is not implemented
+    //~^ ERROR : std::marker::Copy` is not satisfied
 }
 
 fn foo3<'a>() {
@@ -52,7 +52,7 @@ fn foo3<'a>() {
 
     let t: Box<S<Foo>> = box S(marker::PhantomData);
     let a: Box<Gettable<Foo>> = t;
-    //~^ ERROR the trait `std::marker::Copy` is not implemented
+    //~^ ERROR : std::marker::Copy` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/kindck-nonsendable-1.rs

@@ -18,5 +18,5 @@ fn bar<F:FnOnce() + Send>(_: F) { }
 fn main() {
     let x = Rc::new(3);
     bar(move|| foo(x));
-    //~^ ERROR `std::marker::Send` is not implemented
+    //~^ ERROR : std::marker::Send` is not satisfied
 }

src/test/compile-fail/kindck-send-object.rs

@@ -20,11 +20,11 @@ trait Message : Send { }
 
 fn object_ref_with_static_bound_not_ok() {
     assert_send::<&'static (Dummy+'static)>();
-    //~^ ERROR the trait `std::marker::Sync` is not implemented
+    //~^ ERROR : std::marker::Sync` is not satisfied
 }
 
 fn box_object_with_no_bound_not_ok<'a>() {
-    assert_send::<Box<Dummy>>(); //~ ERROR the trait `std::marker::Send` is not implemented
+    assert_send::<Box<Dummy>>(); //~ ERROR : std::marker::Send` is not satisfied
 }
 
 fn object_with_send_bound_ok() {

src/test/compile-fail/kindck-send-object1.rs

@@ -18,7 +18,7 @@ trait Dummy { }
 // careful with object types, who knows what they close over...
 fn test51<'a>() {
     assert_send::<&'a Dummy>();
-    //~^ ERROR the trait `std::marker::Sync` is not implemented
+    //~^ ERROR : std::marker::Sync` is not satisfied
 }
 fn test52<'a>() {
     assert_send::<&'a (Dummy+Sync)>();
@@ -37,7 +37,7 @@ fn test61() {
 // them not ok
 fn test_71<'a>() {
     assert_send::<Box<Dummy+'a>>();
-    //~^ ERROR the trait `std::marker::Send` is not implemented
+    //~^ ERROR : std::marker::Send` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/kindck-send-object2.rs

@@ -14,11 +14,11 @@ fn assert_send<T:Send>() { }
 trait Dummy { }
 
 fn test50() {
-    assert_send::<&'static Dummy>(); //~ ERROR the trait `std::marker::Sync` is not implemented
+    assert_send::<&'static Dummy>(); //~ ERROR : std::marker::Sync` is not satisfied
 }
 
 fn test53() {
-    assert_send::<Box<Dummy>>(); //~ ERROR the trait `std::marker::Send` is not implemented
+    assert_send::<Box<Dummy>>(); //~ ERROR : std::marker::Send` is not satisfied
 }
 
 // ...unless they are properly bounded

src/test/compile-fail/kindck-send-owned.rs

@@ -19,7 +19,7 @@ fn test32() { assert_send::<Vec<isize> >(); }
 
 // but not if they own a bad thing
 fn test40() {
-    assert_send::<Box<*mut u8>>(); //~ ERROR `std::marker::Send` is not implemented
+    assert_send::<Box<*mut u8>>(); //~ ERROR : std::marker::Send` is not satisfied
 }
 
 fn main() { }

src/test/compile-fail/kindck-send-unsafe.rs

@@ -14,7 +14,7 @@ fn assert_send<T:Send>() { }
 
 fn test71<'a>() {
     assert_send::<*mut &'a isize>();
-    //~^ ERROR the trait `core::marker::Send` is not implemented for the type
+    //~^ ERROR `*mut &'a isize : core::marker::Send` is not satisfied
 }
 
 fn main() {

src/test/compile-fail/map-types.rs

@@ -28,5 +28,5 @@ fn main() {
     let x: Box<Map<isize, isize>> = x;
     // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
     let y: Box<Map<usize, isize>> = Box::new(x);
-    //~^ ERROR the trait `Map<usize, isize>` is not implemented
+    //~^ ERROR `Box<Map<isize, isize>> : Map<usize, isize>` is not satisfied
 }

src/test/compile-fail/mut-not-freeze.rs

@@ -15,5 +15,5 @@ fn f<T: Sync>(_: T) {}
 fn main() {
     let x = RefCell::new(0);
     f(x);
-    //~^ ERROR `std::marker::Sync` is not implemented
+    //~^ ERROR `std::cell::RefCell<_> : std::marker::Sync` is not satisfied
 }

src/test/compile-fail/mutable-enum-indirect.rs

@@ -24,5 +24,5 @@ fn bar<T: Sync>(_: T) {}
 
 fn main() {
     let x = Foo::A(NoSync);
-    bar(&x); //~ ERROR the trait `std::marker::Sync` is not implemented
+    bar(&x); //~ ERROR `NoSync : std::marker::Sync` is not satisfied
 }

src/test/compile-fail/no-send-res-ports.rs

@@ -33,7 +33,7 @@ fn main() {
     let x = foo(Port(Rc::new(())));
 
     thread::spawn(move|| {
-        //~^ ERROR `std::marker::Send` is not implemented
+        //~^ ERROR `std::rc::Rc<()> : std::marker::Send` is not satisfied
         let y = x;
         println!("{:?}", y);
     });

src/test/compile-fail/no_send-enum.rs

@@ -24,5 +24,5 @@ fn bar<T: Send>(_: T) {}
 fn main() {
     let x = Foo::A(NoSend);
     bar(x);
-    //~^ ERROR `std::marker::Send` is not implemented
+    //~^ ERROR `NoSend : std::marker::Send` is not satisfied
 }

src/test/compile-fail/no_send-rc.rs

@@ -15,5 +15,5 @@ fn bar<T: Send>(_: T) {}
 fn main() {
     let x = Rc::new(5);
     bar(x);
-    //~^ ERROR `std::marker::Send` is not implemented
+    //~^ ERROR `std::rc::Rc<_> : std::marker::Send` is not satisfied
 }

src/test/compile-fail/no_send-struct.rs

@@ -23,5 +23,5 @@ fn bar<T: Send>(_: T) {}
 fn main() {
     let x = Foo { a: 5 };
     bar(x);
-    //~^ ERROR the trait `std::marker::Send` is not implemented
+    //~^ ERROR `Foo : std::marker::Send` is not satisfied
 }

src/test/compile-fail/no_share-enum.rs

@@ -22,5 +22,5 @@ fn bar<T: Sync>(_: T) {}
 fn main() {
     let x = Foo::A(NoSync);
     bar(x);
-    //~^ ERROR the trait `std::marker::Sync` is not implemented
+    //~^ ERROR `NoSync : std::marker::Sync` is not satisfied
 }

src/test/compile-fail/no_share-struct.rs

@@ -20,5 +20,5 @@ fn bar<T: Sync>(_: T) {}
 fn main() {
     let x = Foo { a: 5 };
     bar(x);
-    //~^ ERROR the trait `std::marker::Sync` is not implemented
+    //~^ ERROR `Foo : std::marker::Sync` is not satisfied
 }

src/test/compile-fail/not-panic-safe-3.rs

@@ -18,5 +18,5 @@ use std::cell::RefCell;
 fn assert<T: RecoverSafe + ?Sized>() {}
 
 fn main() {
-    assert::<Arc<RefCell<i32>>>(); //~ ERROR: is not implemented
+    assert::<Arc<RefCell<i32>>>(); //~ ERROR E0277
 }

src/test/compile-fail/not-panic-safe-5.rs

@@ -17,5 +17,5 @@ use std::cell::UnsafeCell;
 fn assert<T: RecoverSafe + ?Sized>() {}
 
 fn main() {
-    assert::<*const UnsafeCell<i32>>(); //~ ERROR: is not implemented
+    assert::<*const UnsafeCell<i32>>(); //~ ERROR E0277
 }

src/test/compile-fail/not-panic-safe.rs

@@ -16,5 +16,5 @@ use std::panic::RecoverSafe;
 fn assert<T: RecoverSafe + ?Sized>() {}
 
 fn main() {
-    assert::<&mut i32>(); //~ ERROR: RecoverSafe` is not implemented
+    assert::<&mut i32>(); //~ ERROR: RecoverSafe` is not satisfied
 }

src/test/compile-fail/not-sync.rs

@@ -16,19 +16,19 @@ fn test<T: Sync>() {}
 
 fn main() {
     test::<Cell<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::cell::Cell<i32>`
+    //~^ ERROR `std::cell::Cell<i32> : std::marker::Sync` is not satisfied
     test::<RefCell<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::cell::RefCell<i32>`
+    //~^ ERROR `std::cell::RefCell<i32> : std::marker::Sync` is not satisfied
 
     test::<Rc<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::rc::Rc<i32>`
+    //~^ ERROR `std::rc::Rc<i32> : std::marker::Sync` is not satisfied
     test::<Weak<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::rc::Weak<i32>`
+    //~^ ERROR `std::rc::Weak<i32> : std::marker::Sync` is not satisfied
 
     test::<Receiver<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::sync::mpsc::Receiver<i32>`
+    //~^ ERROR `std::sync::mpsc::Receiver<i32> : std::marker::Sync` is not satisfied
     test::<Sender<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::sync::mpsc::Sender<i32>`
+    //~^ ERROR `std::sync::mpsc::Sender<i32> : std::marker::Sync` is not satisfied
     test::<SyncSender<i32>>();
-    //~^ ERROR marker::Sync` is not implemented for the type `std::sync::mpsc::SyncSender<i32>`
+    //~^ ERROR `std::sync::mpsc::SyncSender<i32> : std::marker::Sync` is not satisfied
 }

src/test/compile-fail/object-does-not-impl-trait.rs

@@ -14,5 +14,5 @@
 trait Foo {}
 fn take_foo<F:Foo>(f: F) {}
 fn take_object(f: Box<Foo>) { take_foo(f); }
-//~^ ERROR the trait `Foo` is not implemented
+//~^ ERROR `Box<Foo> : Foo` is not satisfied
 fn main() {}

src/test/compile-fail/phantom-oibit.rs

@@ -31,11 +31,11 @@ struct Nested<T>(T);
 fn is_zen<T: Zen>(_: T) {}
 
 fn not_sync<T>(x: Guard<T>) {
-    is_zen(x)  //~ error: the trait `std::marker::Sync` is not implemented for the type `T`
+    is_zen(x)  //~ error: `T : std::marker::Sync` is not satisfied
 }
 
 fn nested_not_sync<T>(x: Nested<Guard<T>>) {
-    is_zen(x)  //~ error: the trait `std::marker::Sync` is not implemented for the type `T`
+    is_zen(x)  //~ error: `T : std::marker::Sync` is not satisfied
 }
 
 fn main() {}

src/test/compile-fail/range-1.rs

@@ -22,6 +22,6 @@ pub fn main() {
     // Unsized type.
     let arr: &[_] = &[1, 2, 3];
     let range = *arr..;
-    //~^ ERROR the trait `std::marker::Sized` is not implemented
+    //~^ ERROR `[_] : std::marker::Sized` is not satisfied
-    //~| ERROR the trait `std::marker::Sized` is not implemented
+    //~| ERROR `[_] : std::marker::Sized` is not satisfied
 }