From 7a4ed9d200c96d1fa2f9fcdfeab6ee76a3bbd696 Mon Sep 17 00:00:00 2001
From: sergeyv <sergeyv@chromium.org>
Date: Mon, 8 Feb 2016 13:42:07 -0800
Subject: [PATCH] Revert "using the original sourcemap as the base"

This reverts commit ad18689d926d25c7a25b95c630c2ad05b7b5f5b5.

Reason for revert: introduce issue #882

Currently, generated sourcemap contains copy of all existing mappings and adds new mappings from uglified code to original one.
However, previous mapping are no longer valid and shouldn't be added.
---
 lib/sourcemap.js | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/lib/sourcemap.js b/lib/sourcemap.js
index a67011f0..e5d7df60 100644
--- a/lib/sourcemap.js
+++ b/lib/sourcemap.js
@@ -53,16 +53,11 @@ function SourceMap(options) {
         orig_line_diff : 0,
         dest_line_diff : 0,
     });
+    var generator = new MOZ_SourceMap.SourceMapGenerator({
+        file       : options.file,
+        sourceRoot : options.root
+    });
     var orig_map = options.orig && new MOZ_SourceMap.SourceMapConsumer(options.orig);
-    var generator;
-    if (orig_map) {
-      generator = MOZ_SourceMap.SourceMapGenerator.fromSourceMap(orig_map);
-    } else {
-        generator = new MOZ_SourceMap.SourceMapGenerator({
-            file       : options.file,
-            sourceRoot : options.root
-        });
-    }
     function add(source, gen_line, gen_col, orig_line, orig_col, name) {
         if (orig_map) {
             var info = orig_map.originalPositionFor({
@@ -83,7 +78,7 @@ function SourceMap(options) {
             source    : source,
             name      : name
         });
-    }
+    };
     return {
         add        : add,
         get        : function() { return generator },
-- 
2.34.1