Ensure generated sourcemaps are valid.

broccoli/packages.js

@@ -25,6 +25,7 @@ module.exports.routerES = function _routerES() {
       external: ['route-recognizer', 'rsvp'],
       input: 'index.js',
       output: {
+        sourcemap: 'inline',
         file: 'router.js',
         format: 'es',
       },
@@ -111,6 +112,7 @@ module.exports.handlebarsES = function _handlebars() {
     rollup: {
       input: 'handlebars/compiler/base.js',
       output: {
+        sourcemap: false,
         file: 'handlebars.js',
         format: 'es',
         exports: 'named',
@@ -145,6 +147,7 @@ module.exports.rsvpES = function _rsvpES() {
     rollup: {
       input: 'rsvp.js',
       output: {
+        sourcemap: 'inline',
         file: 'rsvp.js',
         format: 'es',
         exports: 'named',
@@ -196,6 +199,7 @@ module.exports.simpleHTMLTokenizerES = function _simpleHTMLTokenizerES() {
     rollup: {
       input: moduleInfo.base,
       output: {
+        sourcemap: 'inline',
         file: 'simple-html-tokenizer.js',
         format: 'es',
         exports: 'named',
@@ -215,6 +219,7 @@ function rollupGlimmerPackage(pkg) {
         input: pkg.module.base,
         external: pkg.dependencies,
         output: {
+          sourcemap: 'inline',
           file: name + '.js',
           format: 'es',
         },

broccoli/to-es5.js

@@ -19,7 +19,7 @@ module.exports = function toES5(tree, _options) {
   let isDebug = options.environment !== 'production';
 
   options.moduleId = true;
-  options.inputSourceMap = false;
+  options.inputSourceMap = true;
   options.sourceMaps = 'inline';
   options.plugins = [
     injectBabelHelpers,

ember-cli-build.js

@@ -347,6 +347,7 @@ function rollupPackage(packagesES, name) {
         return true;
       },
       output: {
+        sourcemap: 'inline',
         file: `${name}.js`,
         format: 'es',
         exports: 'named',

package.json

@@ -145,6 +145,7 @@
     "semver": "^5.5.0",
     "serve-static": "^1.12.2",
     "simple-dom": "^0.3.0",
+    "sourcemap-validator": "^1.1.0",
     "testem": "^1.18.4",
     "tslint": "^5.9.1",
     "tslint-config-prettier": "^1.10.0",

tests/node/sourcemap-test.js

@@ -0,0 +1,21 @@
+const validate = require('sourcemap-validator');
+const fs = require('fs');
+
+QUnit.module('sourcemap validation', function() {
+  let assets = ['ember.debug', 'ember.prod', 'ember.min'];
+
+  assets.forEach(asset => {
+    QUnit.test(`${asset} has valid sourcemaps`, function(assert) {
+      assert.expect(0);
+
+      let jsPath = `dist/${asset}.js`;
+
+      if (fs.existsSync(jsPath)) {
+        let contents = fs.readFileSync(jsPath, 'utf-8');
+        let sourcemap = fs.readFileSync(`dist/${asset}.map`, 'utf-8');
+
+        validate(contents, sourcemap);
+      }
+    });
+  });
+});

tsconfig.json

@@ -2,7 +2,7 @@
   "compilerOptions": {
     // Compilation Configuration
     "target": "es2017",
-    "sourceMap": true,
+    "sourceMap": false,
     "outDir": "dist",
     "baseUrl": "packages",
     "rootDir": "packages",