fn main() {
  let i = 0u;
  loop {
    log(error, "a");
    i += 1u;
    if i == 10u {
      break;
    }
  }
  assert (i == 10u);
  let is_even = false;
  loop {
    if i == 21u {
        break;
    }
    log(error, "b");
    is_even = false;
    i += 1u;
    if i % 2u != 0u {
        cont;
    }
    is_even = true;
  }
  assert !is_even;
  loop {
    log(error, "c");
    if i == 22u {
        break;
    }
    is_even = false;
    i += 1u;
    if i % 2u != 0u {
        cont;
    }
    is_even = true;
  }
  assert is_even;
}
// xfail-test
// runs forever for some reason -- investigating
fn main() {
  let i = 0u;
  loop {
    log(error, "a");
    i += 1u;
    if i == 10u {
      break;
    }
  }
  assert (i == 10u);
  let is_even = false;
  loop {
    log(error, "b");
    is_even = false;
    i += 1u;
    if i % 2u != 0u {
        cont;
    }
    is_even = true;
    if i == 21u {
        break;
    }
  }
  assert !is_even;
  loop {
    log(error, "c");
    is_even = false;
    if i == 22u {
        break;
    }
    i += 1u;
    if i % 2u != 0u {
        cont;
    }
    is_even = true;
  }
  assert is_even;
}
--- 
+++ 
@@ -1,3 +1,5 @@
+// xfail-test
+// runs forever for some reason -- investigating
 fn main() {
   let i = 0u;
   loop {
@@ -10,9 +12,6 @@
   assert (i == 10u);
   let is_even = false;
   loop {
-    if i == 21u {
-        break;
-    }
     log(error, "b");
     is_even = false;
     i += 1u;
@@ -20,14 +19,17 @@
         cont;
     }
     is_even = true;
+    if i == 21u {
+        break;
+    }
   }
   assert !is_even;
   loop {
     log(error, "c");
+    is_even = false;
     if i == 22u {
         break;
     }
-    is_even = false;
     i += 1u;
     if i % 2u != 0u {
         cont;
Fix test so it terminates, and un-xfail it

Still need more tests for loop{}
