Implement LinkError; import tweaks

test/mjsunit/wasm/import-table.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");
 
 function testCallImport(func, check) {
@@ skipping 237 matching lines @@
       kExprI8Const, 97,             // --
       kExprCallFunction, 0,  // --
       kExprGetLocal, 0,             // --
       kExprCallFunction, 1   // --
     ])
     .exportFunc();
 
   var main = builder.instantiate({print: print}).exports.main;
 
   for (var i = -9; i < 900; i += 16.125) {
-      main(i);
+    main(i);
   }
 }
 
 testCallPrint();
 testCallPrint();
 
 
 function testCallImport2(foo, bar, expected) {
   var builder = new WasmModuleBuilder();
 
   builder.addImport("foo", kSig_i_v);
   builder.addImport("bar", kSig_i_v);
   builder.addFunction("main", kSig_i_v)
     .addBody([
       kExprCallFunction, 0, // --
       kExprCallFunction, 1, // --
       kExprI32Add,                 // --
     ])                             // --
     .exportFunc();
 
   var main = builder.instantiate({foo: foo, bar: bar}).exports.main;
   assertEquals(expected, main());
 }
 
 testCallImport2(function() { return 33; }, function () { return 44; }, 77);
+
+
+function testImportName(name) {
+  var builder = new WasmModuleBuilder();
+  builder.addImportWithModule("M", name, kSig_i_v);
+  builder.addFunction("main", kSig_i_v)
+    .addBody([
+      kExprCallFunction, 0
+    ])
+    .exportFunc();
+
+  let main = builder.instantiate({M: {[name]: () => 42}}).exports.main;
+  assertEquals(42, main());
+}
+
+testImportName("bla");
+testImportName("0");
+testImportName("  a @#$2 324 ");
+// TODO(bradnelson): This should succeed.
+// testImportName("");