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

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 js_backend;
 
 typedef void Recompile(Element element);
 
 class ReturnInfo {
   HType returnType;
@@ skipping 467 matching lines @@
     assert(invariant(node, element.isDeclaration));
     if (optimizedStaticFunctions.contains(element)) {
       backend.scheduleForRecompilation(element);
     }
     staticTypeMap[element] = HTypeList.ALL_UNKNOWN;
   }
 
   void registerDynamicInvocation(HInvokeDynamic node,
                                  Selector selector,
                                  HTypeMap types) {
+    if (selector.isClosureCall()) {
+      // We cannot use the current framework to do optimizations based
+      // on the 'call' selector because we are also generating closure
+      // calls during the emitter phase, which at this point, does not
+      // track parameter types, nor invalidates optimized methods.
+      return;
+    }
     HTypeList providedTypes =
         new HTypeList.fromDynamicInvocation(node, selector, types);
     if (!selectorTypeMap.containsKey(selector)) {
       selectorTypeMap[selector] = providedTypes;
     } else {
       HTypeList oldTypes = selectorTypeMap[selector];
       updateTypes(oldTypes, providedTypes, selector, selectorTypeMap);
     }
 
     // If we're not compiling, we don't have to do anything.
@@ skipping 637 matching lines @@
     print("Inferred return types:");
     print("----------------------");
     dumpReturnTypes();
     print("");
     print("Inferred field types:");
     print("------------------------");
     fieldTypes.dump();
     print("");
   }
 }