fallout in tests

in some cases we give more specific messages or fewer
duplicates, now that we have cache and make fewer region variables

src/test/compile-fail/issue-16048.rs

@@ -28,7 +28,7 @@ impl<'a> Test<'a> for Foo<'a> {
 
 impl<'a> NoLifetime for Foo<'a> {
     fn get<'p, T : Test<'a>>(&self) -> T {
-//~^ ERROR lifetime parameters or bounds on method `get` do not match the trait declaration
+//~^ ERROR E0195
         return *self as T;
     }
 }

src/test/compile-fail/issue-20831-debruijn.rs

@@ -39,7 +39,6 @@ impl<'a> Publisher<'a> for MyStruct<'a> {
         // Not obvious, but there is an implicit lifetime here -------^
         //~^^ ERROR cannot infer
         //~|  ERROR cannot infer
-        //~|  ERROR cannot infer
         //
         // The fact that `Publisher` is using an implicit lifetime is
         // what was causing the debruijn accounting to be off, so

src/test/compile-fail/lifetime-inference-give-expl-lifetime-param-3.rs

@@ -14,7 +14,7 @@ use std::marker::PhantomData;
 
 struct Bar<'x, 'y, 'z> { bar: &'y i32, baz: i32, marker: PhantomData<(&'x(),&'y(),&'z())> }
 fn bar1<'a>(x: &Bar) -> (&'a i32, &'a i32, &'a i32) {
-    //~^ HELP: consider using an explicit lifetime parameter as shown: fn bar1<'a>(x: &'a Bar) -> (&'a i32, &'a i32, &'a i32)
+    //~^ HELP consider using an explicit lifetime parameter as shown: fn bar1<'b, 'c, 'a>(x: &'a Bar<'b, 'a, 'c>) -> (&'a i32, &'a i32, &'a i32)
     (x.bar, &x.baz, &x.baz)
     //~^ ERROR E0312
     //~| ERROR cannot infer

src/test/compile-fail/lifetime-inference-give-expl-lifetime-param.rs

@@ -49,7 +49,7 @@ struct Baz<'x> {
 
 impl<'a> Baz<'a> {
     fn baz2<'b>(&self, x: &isize) -> (&'b isize, &'b isize) {
-        //~^ HELP consider using an explicit lifetime parameter as shown: fn baz2<'b>(&self, x: &'b isize) -> (&'a isize, &'a isize)
+        //~^ HELP consider using an explicit lifetime parameter as shown: fn baz2<'b>(&self, x: &'a isize) -> (&'a isize, &'a isize)
         (self.bar, x) //~ ERROR E0312
         //~^ ERROR E0312
     }

src/test/compile-fail/regions-early-bound-error-method.rs

@@ -28,11 +28,7 @@ impl<'a> GetRef<'a> for Box<'a> {
 impl<'a> Box<'a> {
     fn or<'b,G:GetRef<'b>>(&self, g2: G) -> &'a isize {
         g2.get()
-        //~^ ERROR mismatched types
-        //~| expected type `&'a isize`
-        //~| found type `&'b isize`
-        //~| lifetime mismatch
-
+        //~^ ERROR E0312
     }
 }
 

src/test/compile-fail/regions-early-bound-error.rs

@@ -27,7 +27,7 @@ impl<'a,T:Clone> GetRef<'a,T> for Box<'a,T> {
 
 fn get<'a,'b,G:GetRef<'a, isize>>(g1: G, b: &'b isize) -> &'b isize {
     g1.get()
-    //~^ ERROR mismatched types
+    //~^ ERROR E0312
 }
 
 fn main() {

src/test/compile-fail/regions-infer-invariance-due-to-mutability-4.rs

@@ -10,7 +10,7 @@
 
 
 struct Invariant<'a> {
-    f: Box<for<'b> FnOnce() -> &'b mut &'a isize + 'static>,
+    f: Box<FnOnce() -> *mut &'a isize + 'static>,
 }
 
 fn to_same_lifetime<'r>(b_isize: Invariant<'r>) {