Short curcuit the inlining when code in the middle of an expression is aborting.

tests/language/issue15606_test.dart

+// Copyright (c) 2013, 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 Foo<T> {}
+
+var a = [new Object(), 42];
+
+main() {
+  while (false) { // Comply to inlining heuristics.
+    var foo = Unresolved.foo( // Use an unresolved prefix.
+      new Foo<int>(), // Make dart2js generate a call to setRuntimeTypeInfo.
+      a[0].toString()); // Use a one-shot interceptor.
+
+    // Do an is test on `Foo` to require setRuntimeTypeInfo.
+    print(foo is Foo<int>);
+  }
+}