Optimize functions on a second thread.

test/mjsunit/regress/regress-1118.js

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-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --noparallel-recompilation
 
 // An exception thrown in a function optimized by on-stack replacement (OSR)
 // should be able to construct a receiver from all optimized stack frames.
 
 function A() { }
 A.prototype.f = function() { }
 
 function B() { }
 
 var o = new A();
@@ skipping 16 matching lines @@
     while (%GetOptimizationStatus(h) == 2) {
       for (var j = 0; j < 100; j++) g();
     }
     g();
   }
 }
 
 h();
 o = new B();
 assertThrows("h()");