From 5ff19ad4ffc535ec6996dcda538091e7e69baaba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20von=20der=20Ah=C3=A9?= <ahe@google.com>
Date: Wed, 11 Jan 2017 12:31:38 +0100
Subject: [PATCH] Allow main to be null for modular tranformation.

R=asgerf@google.com

Review-Url: https://codereview.chromium.org/2612873005 .
---
 pkg/kernel/lib/transformations/setup_builtin_library.dart | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkg/kernel/lib/transformations/setup_builtin_library.dart b/pkg/kernel/lib/transformations/setup_builtin_library.dart
index cc4149a74e9..c04d05091ee 100644
--- a/pkg/kernel/lib/transformations/setup_builtin_library.dart
+++ b/pkg/kernel/lib/transformations/setup_builtin_library.dart
@@ -13,6 +13,8 @@ Program transformProgram(Program program,
     {String libraryUri: 'dart:_builtin'}) {
   Procedure mainMethod = program.mainMethod;
 
+  if (mainMethod == null) return program;
+
   Library builtinLibrary;
   for (Library library in program.libraries) {
     if (library.importUri.toString() == libraryUri) {