From a5751003a7f29b45f81a96fa942541b288fe3eca Mon Sep 17 00:00:00 2001
From: Ben Newman <ben@meteor.com>
Date: Sat, 9 Jun 2018 16:08:22 -0400
Subject: [PATCH] Use lazyFinalizer function when calling addJavaScript in
 BabelCompiler.

---
 packages/babel-compiler/babel-compiler.js | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/packages/babel-compiler/babel-compiler.js b/packages/babel-compiler/babel-compiler.js
index 7c9e5a7c8e..b3c91795bb 100644
--- a/packages/babel-compiler/babel-compiler.js
+++ b/packages/babel-compiler/babel-compiler.js
@@ -21,15 +21,29 @@ var hasOwn = Object.prototype.hasOwnProperty;
 var isMeteorPre144 = semver.lt(process.version, "4.8.1");
 
 BCp.processFilesForTarget = function (inputFiles) {
+  var compiler = this;
+
   // Reset this cache for each batch processed.
   this._babelrcCache = null;
 
   inputFiles.forEach(function (inputFile) {
-    var toBeAdded = this.processOneFileForTarget(inputFile);
-    if (toBeAdded) {
-      inputFile.addJavaScript(toBeAdded);
+    var fileOptions = inputFile.getFileOptions();
+
+    if (inputFile.supportsLazyCompilation) {
+      inputFile.addJavaScript({
+        path: inputFile.getPathInPackage(),
+        hash: inputFile.getSourceHash(),
+        bare: !! fileOptions.bare
+      }, function () {
+        return compiler.processOneFileForTarget(inputFile);
+      });
+    } else {
+      var toBeAdded = compiler.processOneFileForTarget(inputFile);
+      if (toBeAdded) {
+        inputFile.addJavaScript(toBeAdded);
+      }
     }
-  }, this);
+  });
 };
 
 // Returns an object suitable for passing to inputFile.addJavaScript, or