Remove has_errors from FnCtxt

src/test/ui/error-codes/E0767.rs

@@ -1,6 +1,7 @@
-fn main () {
+fn main() {
     'a: loop {
         || {
+            //~^ ERROR mismatched types
             loop { break 'a; } //~ ERROR E0767
         }
     }

src/test/ui/error-codes/E0767.stderr

@@ -1,14 +1,27 @@
 error[E0767]: use of unreachable label `'a`
-  --> $DIR/E0767.rs:4:26
+  --> $DIR/E0767.rs:5:26
    |
 LL |     'a: loop {
    |     -- unreachable label defined here
-LL |         || {
+...
 LL |             loop { break 'a; }
    |                          ^^ unreachable label `'a`
    |
    = note: labels are unreachable through functions, closures, async blocks and modules
 
-error: aborting due to previous error
+error[E0308]: mismatched types
+  --> $DIR/E0767.rs:3:9
+   |
+LL | /         || {
+LL | |
+LL | |             loop { break 'a; }
+LL | |         }
+   | |_________^ expected `()`, found closure
+   |
+   = note: expected unit type `()`
+                found closure `[closure@$DIR/E0767.rs:3:9: 3:11]`
 
-For more information about this error, try `rustc --explain E0767`.
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0308, E0767.
+For more information about an error, try `rustc --explain E0308`.