From c903bb2e4e7f7b4fc0378945f4478b58020e29ff Mon Sep 17 00:00:00 2001
From: Rich-Harris <richard.a.harris@gmail.com>
Date: Tue, 22 Sep 2015 11:48:30 -0400
Subject: [PATCH] prevent content around synthetic nodes being overwritten
 twice - fixes #105

---
 src/Module.js                                          | 8 ++++++--
 test/function/handles-multiple-declarations/_config.js | 3 +++
 test/function/handles-multiple-declarations/main.js    | 2 ++
 3 files changed, 11 insertions(+), 2 deletions(-)
 create mode 100644 test/function/handles-multiple-declarations/_config.js
 create mode 100644 test/function/handles-multiple-declarations/main.js

diff --git a/src/Module.js b/src/Module.js
index 01b461a..c6ec708 100644
--- a/src/Module.js
+++ b/src/Module.js
@@ -515,8 +515,12 @@ export default class Module {
 			// should be split up. Otherwise, we may end up including code we
 			// don't need, just because an unwanted declarator is included
 			if ( node.type === 'VariableDeclaration' && node.declarations.length > 1 ) {
-				// remove the leading var/let/const
-				this.magicString.remove( node.start, node.declarations[0].start );
+				// remove the leading var/let/const... UNLESS the previous node
+				// was also a synthetic node, in which case it'll get removed anyway
+				const lastStatement = statements[ statements.length - 1 ];
+				if ( !lastStatement || !lastStatement.node.isSynthetic ) {
+					this.magicString.remove( node.start, node.declarations[0].start );
+				}
 
 				node.declarations.forEach( declarator => {
 					const { start, end } = declarator;
diff --git a/test/function/handles-multiple-declarations/_config.js b/test/function/handles-multiple-declarations/_config.js
new file mode 100644
index 0000000..94022ee
--- /dev/null
+++ b/test/function/handles-multiple-declarations/_config.js
@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'handles multiple declaration blocks with multiple declarations (#105)'
+};
diff --git a/test/function/handles-multiple-declarations/main.js b/test/function/handles-multiple-declarations/main.js
new file mode 100644
index 0000000..a8af4cd
--- /dev/null
+++ b/test/function/handles-multiple-declarations/main.js
@@ -0,0 +1,2 @@
+var a, b;
+var c, d;