From 2874ae1aed0d26124ad485438e41a3f6c9063af9 Mon Sep 17 00:00:00 2001
From: Michiel Westerbeek <happylinks@gmail.com>
Date: Wed, 21 Mar 2018 11:30:35 +0100
Subject: [PATCH] Changed null to undefined for sourceFileName and
 sourceMapTarget.

Babel 7 returns errors for sourceFileName and sourceMapTarget because they are specified as null.
Error: .sourceFileName must be a string, or undefined
---
 source/runner/runners/utils/transpiler.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/runner/runners/utils/transpiler.ts b/source/runner/runners/utils/transpiler.ts
index 24dbf4a61..d84670e74 100644
--- a/source/runner/runners/utils/transpiler.ts
+++ b/source/runner/runners/utils/transpiler.ts
@@ -87,8 +87,8 @@ export const babelify = (content: string, filename: string, extraPlugins: string
     filename,
     filenameRelative: filename,
     sourceMap: false,
-    sourceFileName: null,
-    sourceMapTarget: null,
+    sourceFileName: undefined,
+    sourceMapTarget: undefined,
     sourceType: "module",
     plugins: [...extraPlugins, ...options.plugins],
   }