Now that we inline instance methods on all kinds of receivers (not only "this" calls), we need to d…

sdk/lib/_internal/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.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 1199 matching lines @@
 
     if (canBeInlined == null) {
       canBeInlined = InlineWeeder.canBeInlined(functionExpression, newElements);
       backend.canBeInlined[function] = canBeInlined;
       if (!canBeInlined) return false;
     }
 
     assert(canBeInlined);
     InliningState state = enterInlinedMethod(
         function, selector, argumentsNodes, providedArguments, currentNode);
+    // Add an explicit null check on the receiver. We use [element]
+    // to get the same name in the NoSuchMethodError message as if we had
+    // called it.
+    if (element.isInstanceMember()
+        && (selector.mask == null || selector.mask.isNullable)) {
+      addWithPosition(
+          new HFieldGet(element, providedArguments[0]), currentNode);
+    }
     inlinedFrom(element, () {
       functionExpression.body.accept(this);
     });
     leaveInlinedMethod(state);
     return true;
   }
 
   inlinedFrom(Element element, f()) {
     assert(element is FunctionElement || element is VariableElement);
     return compiler.withCurrentElement(element, () {
@@ skipping 4039 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }