[destructuring] More tests for object literal pattern

src/pattern-rewriter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast.h"
 #include "src/messages.h"
 #include "src/parser.h"
 
 namespace v8 {
 
@@ skipping 191 matching lines @@
     Assignment* assignment = factory()->NewAssignment(
         descriptor_->init_op, proxy, value, descriptor_->pos);
     block_->AddStatement(
         factory()->NewExpressionStatement(assignment, RelocInfo::kNoPosition),
         zone());
   }
 }
 
 
 void Parser::PatternRewriter::VisitObjectLiteral(ObjectLiteral* pattern) {
-  auto temp = descriptor_->declaration_scope->NewTemporary(
+  auto temp = TemporaryDeclarationScope()->NewTemporary(
       ast_value_factory()->empty_string());
   auto assignment =
       factory()->NewAssignment(Token::ASSIGN, factory()->NewVariableProxy(temp),
                                current_value_, RelocInfo::kNoPosition);
+
   block_->AddStatement(
       factory()->NewExpressionStatement(assignment, RelocInfo::kNoPosition),
       zone());
+
+  if (pattern->properties()->length() == 0) {
+    block_->AddStatement(descriptor_->parser->BuildAssertIsCoercible(temp),
+                         zone());
+  }
+
   for (ObjectLiteralProperty* property : *pattern->properties()) {
     // TODO(dslomov): computed property names.
     RecurseIntoSubpattern(
         property->value(),
         factory()->NewProperty(factory()->NewVariableProxy(temp),
                                property->key(), RelocInfo::kNoPosition));
   }
 }
 
 
@@ skipping 58 matching lines @@
 NOT_A_PATTERN(TryFinallyStatement)
 NOT_A_PATTERN(UnaryOperation)
 NOT_A_PATTERN(VariableDeclaration)
 NOT_A_PATTERN(WhileStatement)
 NOT_A_PATTERN(WithStatement)
 NOT_A_PATTERN(Yield)
 
 #undef NOT_A_PATTERN
 }
 }  // namespace v8::internal