From 2ec8ff729eebb58a2d55d0c1b7507aaea328f80d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Esa=C3=BA=20Garc=C3=ADa=20S=C3=A1nchez-Torija?=
 <2669347+egasato@users.noreply.github.com>
Date: Tue, 22 May 2018 15:35:52 +0200
Subject: [PATCH] Fix issue #862 (#863)

* Fix issue #862

The following changes were applied:

  - Added a condition where the property "file" is checked. If it
    doesn't exist it is copied from the original source file.

* Fix indentation typo

* Fix index.js with 'yarn lint --fix'
---
 packages/gulp-babel-minify/src/index.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/gulp-babel-minify/src/index.js b/packages/gulp-babel-minify/src/index.js
index 5ea7df0fd..14270f260 100644
--- a/packages/gulp-babel-minify/src/index.js
+++ b/packages/gulp-babel-minify/src/index.js
@@ -63,6 +63,9 @@ function gulpBabelMinify(
     if (success) {
       file.contents = new Buffer(result.code);
       if (file.sourceMap) {
+        if (!result.map.hasOwnProperty("file")) {
+          result.map.file = file.sourceMap.file;
+        }
         applySourceMap(file, result.map);
       }
       return callback(null, file);