borrowck-mutate-in-guard: update test.

Author: Centril

src/test/ui/borrowck/borrowck-mutate-in-guard.nll.stderr

@@ -9,15 +9,11 @@ fn foo() -> isize {
     match x {
         Enum::A(_) if { x = Enum::B(false); false } => 1,
         //~^ ERROR cannot assign in a pattern guard
-        //~| WARN cannot assign `x` in match guard
-        //~| WARN this error has been downgraded to a warning for backwards compatibility
-        //~| WARN this represents potential undefined behavior in your code and this warning will
+        //~| ERROR cannot assign `x` in match guard
         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
         //~^ ERROR cannot mutably borrow in a pattern guard
         //~| ERROR cannot assign in a pattern guard
-        //~| WARN cannot mutably borrow `x` in match guard
-        //~| WARN this error has been downgraded to a warning for backwards compatibility
-        //~| WARN this represents potential undefined behavior in your code and this warning will
+        //~| ERROR cannot mutably borrow `x` in match guard
         Enum::A(p) => *p,
         Enum::B(_) => 2,
     }

src/test/ui/borrowck/borrowck-mutate-in-guard.rs

@@ -5,45 +5,37 @@ LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
    |                         ^^^^^^^^^^^^^^^^^^ assignment in pattern guard
 
 error[E0301]: cannot mutably borrow in a pattern guard
-  --> $DIR/borrowck-mutate-in-guard.rs:15:38
+  --> $DIR/borrowck-mutate-in-guard.rs:13:38
    |
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                      ^ borrowed mutably in pattern guard
    |
    = help: add `#![feature(bind_by_move_pattern_guards)]` to the crate attributes to enable
 
 error[E0302]: cannot assign in a pattern guard
-  --> $DIR/borrowck-mutate-in-guard.rs:15:41
+  --> $DIR/borrowck-mutate-in-guard.rs:13:41
    |
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                         ^^^^^^^^^^^^^^^^^^^ assignment in pattern guard
 
-warning[E0510]: cannot assign `x` in match guard
+error[E0510]: cannot assign `x` in match guard
   --> $DIR/borrowck-mutate-in-guard.rs:10:25
    |
 LL |     match x {
    |           - value is immutable in match guard
 LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
    |                         ^^^^^^^^^^^^^^^^^^ cannot assign
-   |
-   = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
-   = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
-   = note: for more information, try `rustc --explain E0729`
 
-warning[E0510]: cannot mutably borrow `x` in match guard
-  --> $DIR/borrowck-mutate-in-guard.rs:15:33
+error[E0510]: cannot mutably borrow `x` in match guard
+  --> $DIR/borrowck-mutate-in-guard.rs:13:33
    |
 LL |     match x {
    |           - value is immutable in match guard
 ...
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                 ^^^^^^ cannot mutably borrow
-   |
-   = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
-   = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
-   = note: for more information, try `rustc --explain E0729`
 
-error: aborting due to 3 previous errors
+error: aborting due to 5 previous errors
 
 Some errors have detailed explanations: E0301, E0302, E0510.
 For more information about an error, try `rustc --explain E0301`.