Replace most invocations of fail keyword with die! macro

src/test/auxiliary/issue_2723_a.rs

@@ -9,5 +9,5 @@
 // except according to those terms.
 
 pub unsafe fn f(xs: ~[int]) {
-    xs.map(|_x| { unsafe fn q() { fail; } });
+    xs.map(|_x| { unsafe fn q() { die!(); } });
 }

src/test/bench/shootout-pfib.rs

@@ -68,7 +68,7 @@ fn parse_opts(argv: ~[~str]) -> Config {
       Ok(ref m) => {
           return Config {stress: getopts::opt_present(m, ~"stress")}
       }
-      Err(_) => { fail; }
+      Err(_) => { die!(); }
     }
 }
 

src/test/compile-fail/borrowck-vec-pattern-element-loan.rs

@@ -2,7 +2,7 @@ fn a() -> &[int] {
     let vec = [1, 2, 3, 4];
     let tail = match vec { //~ ERROR illegal borrow
         [_a, ..tail] => tail,
-        _ => fail ~"foo"
+        _ => die!(~"foo")
     };
     move tail
 }

src/test/compile-fail/borrowck-vec-pattern-tail-element-loan.rs

@@ -2,7 +2,7 @@ fn a() -> &int {
     let vec = [1, 2, 3, 4];
     let tail = match vec { //~ ERROR illegal borrow
         [_a, ..tail] => &tail[0],
-        _ => fail ~"foo"
+        _ => die!(~"foo")
     };
     move tail
 }

src/test/run-fail/task-comm-recv-block.rs

@@ -21,5 +21,5 @@ fn main() {
     // We shouldn't be able to get past this recv since there's no
     // message available
     let i: int = po.recv();
-    fail ~"badfail";
+    die!(~"badfail");
 }