From dd985c3be3186049ffaf205ef2227108f2e5fb65 Mon Sep 17 00:00:00 2001 From: Logan Smyth Date: Mon, 3 Sep 2018 12:21:54 -0700 Subject: [PATCH] Verify 'sourceMap' with hasOwnProperty since it can be falsy. --- packages/babel-core/src/config/config-chain.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/packages/babel-core/src/config/config-chain.js b/packages/babel-core/src/config/config-chain.js index f46d0ee2ac..b9e13a1307 100644 --- a/packages/babel-core/src/config/config-chain.js +++ b/packages/babel-core/src/config/config-chain.js @@ -542,7 +542,7 @@ function normalizeOptions(opts: ValidatedOptions): ValidatedOptions { // "sourceMap" is just aliased to sourceMap, so copy it over as // we merge the options together. - if (options.sourceMap) { + if (options.hasOwnProperty("sourceMap")) { options.sourceMaps = options.sourceMap; delete options.sourceMap; }