[wasm] Catch attempt to export non-existent memory

test/mjsunit/wasm/instantiate-module-basic.js

 // 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.
 
 // Flags: --expose-wasm
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 let kReturnValue = 17;
@@ skipping 223 matching lines @@
   print("MustBeMemory...");
   var memory = new ArrayBuffer(65536);
   let builder = new WasmModuleBuilder();
   builder.addImportedMemory("", "memory");
 
   let module = new WebAssembly.Module(builder.toBuffer());
 
 
   assertThrows(() => new WebAssembly.Instance(module, {"":{memory:memory}}), WebAssembly.LinkError);
 })();
+
+(function TestNoMemoryToExport() {
+  let builder = new WasmModuleBuilder();
+  builder.exportMemoryAs('memory');
+  assertThrows(() => builder.instantiate(), WebAssembly.CompileError);
+})();