Don't try to resolve in the builder.

lib/compiler/implementation/ssa/builder.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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 2337 matching lines @@
       } else if (element.isGenerativeConstructor()) {
         ClassElement cls = element.enclosingElement;
         return new HBoundedType.exact(cls.type);
       } else {
         return HType.UNKNOWN;
       }
     }
 
     Selector selector = elements.getSelector(node);
     Element element = elements[node];
-    compiler.resolver.resolveMethodElement(element);
+    assert(compiler.enqueuer.resolution.getCachedElements(element) !== null);

[ahe, 2012/06/18 09:50:07]

I would prefer if this was an internal error:

if (compiler.enqueuer.resolution.getCachedElements(element) === null) {
  compiler.internalError('Unresolved element: $element', node: node);
}

[floitsch, 2012/06/18 10:30:22]

Done.

     FunctionElement functionElement = element;
     element = functionElement.defaultImplementation;
     HInstruction target = new HStatic(element);
     add(target);
     var inputs = <HInstruction>[];
     inputs.add(target);
     bool succeeded = addStaticSendArgumentsToList(selector, node.arguments,
                                                   element, inputs);
     if (!succeeded) {
       // TODO(ngeoffray): Match the VM behavior and throw an
@@ skipping 1091 matching lines @@
   void visitNodeList(NodeList node) {
      node.visitChildren(this);
   }
 
   HInstruction concat(HInstruction left, HInstruction right) {
     HInstruction instruction = new HStringConcat(left, right, diagnosticNode);
     builder.add(instruction);
     return instruction;
   }
 }