Merge up to 8597 to experimental/gc from the bleeding edge.

test/mjsunit/regress/regress-1528.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 20 matching lines @@
 
 // Code below should not assert or crash.
 try {
   fail;
 } catch (e) {
   with({}) {  // With scope inside catch scope.
     // Dynamic declaration forces runtime lookup to observe the context chain.
     eval('const x = 7');
   }
 }