Fix priority of exceptions being thrown from for-of loops

test/mjsunit/harmony/iterator-close.js

Index: test/mjsunit/harmony/iterator-close.js
diff --git a/test/mjsunit/harmony/iterator-close.js b/test/mjsunit/harmony/iterator-close.js
index 94785de51f48f516a658f4de91c2f05b50e35da0..3cc4412e8a967c3c18015af989ecb5ef14bd2e18 100644
--- a/test/mjsunit/harmony/iterator-close.js
+++ b/test/mjsunit/harmony/iterator-close.js
@@ -87,13 +87,15 @@ function* g() { yield 42; return 88 };
     for (x of g()) { break; }
   }, TypeError);
 
-  assertThrows(() => {
+  // Throw from the body of a for loop 'wins' vs throw
+  // originating from a bad 'return' value.
+  assertThrowsEquals(() => {
     for (let x of g()) { throw 666; }
-  }, TypeError);
+  }, 666);
 
-  assertThrows(() => {
+  assertThrowsEquals(() => {
     for (x of g()) { throw 666; }
-  }, TypeError);
+  }, 666);
 
   assertThrows(() => {
     for (let x of g()) { return 666; }