Fix materialization of captured objects in adapted arguments.

test/mjsunit/regress/regress-348512.js

Index: test/mjsunit/regress/regress-348512.js
diff --git a/test/mjsunit/recursive-store-opt.js b/test/mjsunit/regress/regress-348512.js
similarity index 92%
copy from test/mjsunit/recursive-store-opt.js
copy to test/mjsunit/regress/regress-348512.js
index fb2649248dbabc642f864f671d0ce2273ad44bd7..7d896664c249c1974ad468292c14284fd2e99413 100644
--- a/test/mjsunit/recursive-store-opt.js
+++ b/test/mjsunit/regress/regress-348512.js
@@ -27,15 +27,11 @@
 
 // Flags: --allow-natives-syntax
 
-function g() {
-  this.x = this;
-}
+function h(y) { assertEquals(42, y.u); }
+function g() { h.apply(0, arguments); }
+function f(x) { g({ u : x }); }
 
-function f() {
-  return new g();
-}
-
-f();
-f();
+f(42);
+f(42);
 %OptimizeFunctionOnNextCall(f);
-f();
+f(42);