Fix regression caused by supporting inlining accesses to non-JSObjects

test/mjsunit/regress/regress-keyed-access-string-length.js

Index: test/mjsunit/regress/regress-keyed-access-string-length.js
diff --git a/test/mjsunit/regress/regress-crbug-173974.js b/test/mjsunit/regress/regress-keyed-access-string-length.js
similarity index 95%
copy from test/mjsunit/regress/regress-crbug-173974.js
copy to test/mjsunit/regress/regress-keyed-access-string-length.js
index 905bd6058a0ad0fe2ebe10e4c7dafbe9945cbe3b..f2ead686c6b9b9ee43aa9b6353c3745061907282 100644
--- a/test/mjsunit/regress/regress-crbug-173974.js
+++ b/test/mjsunit/regress/regress-keyed-access-string-length.js
@@ -27,10 +27,11 @@
 
 // Flags: --allow-natives-syntax
 
-function f() {
-  var count = "";
-  count[0] --;
+function f(i) {
+  return "abc"[i];
 }
-f();
+
+f("length");
+f("length");
 %OptimizeFunctionOnNextCall(f);
-f();
+f("length");