Make stray 'return' an early error

test/mjsunit/delay-syntax-error.js

Index: test/mjsunit/delay-syntax-error.js
diff --git a/test/mjsunit/delay-syntax-error.js b/test/mjsunit/delay-syntax-error.js
index 64cc1429bbcb2fc7c43d00a88c6d17f0e9142a95..20b2affacc0d2b11fb440ad97f2c398c3d8c7eba 100644
--- a/test/mjsunit/delay-syntax-error.js
+++ b/test/mjsunit/delay-syntax-error.js
@@ -25,18 +25,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// To be compatible with JSC syntax errors for illegal returns should be delayed
-// to runtime.
-// Invalid continue and break statements are caught at compile time.
-
-// Do not throw syntax errors for illegal return at compile time.
-assertDoesNotThrow("if (false) return;");
-
-// Throw syntax errors for illegal break and continue at compile time.
+// Throw syntax errors for illegal return, break and continue at compile time.
+assertThrows("if (false) return;");
 assertThrows("if (false) break;");
 assertThrows("if (false) continue;");
 
-// Throw syntax errors for illegal return, break and continue at runtime.
 assertThrows("return;");
 assertThrows("break;");
 assertThrows("continue;");