Do not track parameter types of closures, since closure calls can be generated during the emitter.

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 1631 matching lines @@
   }
 
   visitInvokeClosure(HInvokeClosure node) {
     Selector call = new Selector.callClosureFrom(node.selector);
     use(node.receiver);
     push(jsPropertyCall(pop(),
                         backend.namer.invocationName(call),
                         visitArguments(node.inputs)),
          node);
     world.registerDynamicInvocation(call.name, call);
-    // A closure can also be invoked through [HInvokeDynamicMethod] by
-    // explicitly calling the [:call:] method. Therefore, we must also
-    // register types here to let the backend invalidate wrong
-    // optimizations.
-    backend.registerDynamicInvocation(node, call, types);
   }
 
   visitInvokeStatic(HInvokeStatic node) {
     if (node.typeCode() == HInstruction.INVOKE_STATIC_TYPECODE) {
       // Register this invocation to collect the types used at all call sites.
       backend.registerStaticInvocation(node, types);
     }
     use(node.target);
     push(new js.Call(pop(), visitArguments(node.inputs)), node);
   }
@@ skipping 1352 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }