Fix a pair of issues in the Dart code for the front end.

pkg/kernel/lib/binary/ast_to_binary.dart

Index: pkg/kernel/lib/binary/ast_to_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_to_binary.dart b/pkg/kernel/lib/binary/ast_to_binary.dart
index 95ad03729800295347a08087aa5058622d86ef96..f2e47e03bc13d7c89e7494d9fc9413c94323b278 100644
--- a/pkg/kernel/lib/binary/ast_to_binary.dart
+++ b/pkg/kernel/lib/binary/ast_to_binary.dart
@@ -1038,7 +1038,7 @@ class LibraryFilteringBinaryPrinter extends BinaryPrinter {
     writeStringTable(_stringIndexer);
     writeUriToSource(program);
     writeLinkTable(program);
-    writeList(program.libraries.where(predicate), writeNode);
+    writeList(program.libraries.where(predicate).toList(), writeNode);
     writeMemberReference(program.mainMethod, allowNull: true);
     _flush();
   }