Minimal repro

Author: chriskrycho

README.md

@@ -1,57 +1,23 @@
 # do-it-break
 
-This README outlines the details of collaborating on this Ember application.
-A short introduction of this app could easily go here.
+It do!
 
-## Prerequisites
+(This is a minimal reproduction of https://github.com/babel/ember-cli-babel/issues/419)
 
-You will need the following things properly installed on your computer.
+Clone and `ember s`; as soon as it hits tracked-built-ins, you'll see this output:
 
-* [Git](https://git-scm.com/)
-* [Node.js](https://nodejs.org/)
-* [Yarn](https://yarnpkg.com/)
-* [Ember CLI](https://ember-cli.com/)
-* [Google Chrome](https://google.com/chrome/)
+```
+Build Error (broccoli-persistent-filter:Babel > [Babel: tracked-built-ins]) in tracked-built-ins/-private/object.js
 
-## Installation
+/Users/ckrycho/dev/test/do-it-break/tracked-built-ins/-private/object.js: Class private methods are not enabled.
+  65 |
+  66 |   // @private
+> 67 |   #readStorageFor(key) {
+     |   ^
+  68 |     let storage = this.#storages.get(key);
+  69 |
+  70 |     if (storage === undefined) {
 
-* `git clone <repository-url>` this repository
-* `cd do-it-break`
-* `yarn install`
 
-## Running / Development
-
-* `ember serve`
-* Visit your app at [http://localhost:4200](http://localhost:4200).
-* Visit your tests at [http://localhost:4200/tests](http://localhost:4200/tests).
-
-### Code Generators
-
-Make use of the many generators for code, try `ember help generate` for more details
-
-### Running Tests
-
-* `ember test`
-* `ember test --server`
-
-### Linting
-
-* `yarn lint`
-* `yarn lint:fix`
-
-### Building
-
-* `ember build` (development)
-* `ember build --environment production` (production)
-
-### Deploying
-
-Specify what it takes to deploy your app.
-
-## Further Reading / Useful Links
-
-* [ember.js](https://emberjs.com/)
-* [ember-cli](https://ember-cli.com/)
-* Development Browser Extensions
-  * [ember inspector for chrome](https://chrome.google.com/webstore/detail/ember-inspector/bmdblncegkenkacieihfhpjfppoconhi)
-  * [ember inspector for firefox](https://addons.mozilla.org/en-US/firefox/addon/ember-inspector/)
+Stack Trace and Error Report: /var/folders/bw/k3jm2wf96p390m_k4jmhwm5c001321/T/error.dump.d6809848bc20bdeb895ea95b03bfbf87.log
+```

package.json

@@ -58,7 +58,8 @@
     "npm-run-all": "^4.1.5",
     "prettier": "^2.3.2",
     "qunit": "^2.16.0",
-    "qunit-dom": "^1.6.0"
+    "qunit-dom": "^1.6.0",
+    "tracked-built-ins": "^2.0.0"
   },
   "engines": {
     "node": "12.* || 14.* || >= 16"

yarn.lock

@@ -1346,7 +1346,7 @@
     "@handlebars/parser" "^1.1.0"
     simple-html-tokenizer "^0.5.10"
 
-"@glimmer/tracking@^1.0.4":
+"@glimmer/tracking@^1.0.0", "@glimmer/tracking@^1.0.4":
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/@glimmer/tracking/-/tracking-1.0.4.tgz#f1bc1412fe5e2236d0f8d502994a8f88af1bbb21"
   integrity sha512-F+oT8I55ba2puSGIzInmVrv/8QA2PcK1VD+GWgFMhF6WC97D+uZX7BFg+a3s/2N4FVBq5KHE+QxZzgazM151Yw==
@@ -4739,7 +4739,7 @@ ember-cli-babel@^6.0.0-beta.4:
     ember-cli-version-checker "^2.1.2"
     semver "^5.5.0"
 
-ember-cli-babel@^7.0.0, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.21.0, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.5, ember-cli-babel@^7.26.6, ember-cli-babel@^7.7.3:
+ember-cli-babel@^7.0.0, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.21.0, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.3, ember-cli-babel@^7.26.5, ember-cli-babel@^7.26.6, ember-cli-babel@^7.7.3:
   version "7.26.6"
   resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-7.26.6.tgz#322fbbd3baad9dd99e3276ff05bc6faef5e54b39"
   integrity sha512-040svtfj2RC35j/WMwdWJFusZaXmNoytLAMyBDGLMSlRvznudTxZjGlPV6UupmtTBApy58cEF8Fq4a+COWoEmQ==
@@ -4918,7 +4918,7 @@ ember-cli-typescript@^2.0.2:
     stagehand "^1.0.0"
     walk-sync "^1.0.0"
 
-ember-cli-typescript@^4.1.0:
+ember-cli-typescript@^4.1.0, ember-cli-typescript@^4.2.1:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/ember-cli-typescript/-/ember-cli-typescript-4.2.1.tgz#54d08fc90318cc986f3ea562f93ce58a6cc4c24d"
   integrity sha512-0iKTZ+/wH6UB/VTWKvGuXlmwiE8HSIGcxHamwNhEC5x1mN3z8RfvsFZdQWYUzIWFN2Tek0gmepGRPTwWdBYl/A==
@@ -5279,6 +5279,14 @@ ember-template-recast@^5.0.3:
     tmp "^0.2.1"
     workerpool "^6.1.4"
 
+ember-tracked-storage-polyfill@1.0.0, ember-tracked-storage-polyfill@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ember-tracked-storage-polyfill/-/ember-tracked-storage-polyfill-1.0.0.tgz#84d307a1e4badc5f84dca681db2cfea9bdee8a77"
+  integrity sha512-eL7lZat68E6P/D7b9UoTB5bB5Oh/0aju0Z7PCMi3aTwhaydRaxloE7TGrTRYU+NdJuyNVZXeGyxFxn2frvd3TA==
+  dependencies:
+    ember-cli-babel "^7.26.3"
+    ember-cli-htmlbars "^5.7.1"
+
 emoji-regex@^8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-8.0.0.tgz#e818fd69ce5ccfcb404594f842963bf53164cc37"
@@ -10634,6 +10642,26 @@ tr46@~0.0.3:
   resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
   integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
 
+tracked-built-ins@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/tracked-built-ins/-/tracked-built-ins-2.0.0.tgz#fb8ad7f6ace27595b58e64df21fe308d82416701"
+  integrity sha512-+aB1jcGmDxi/0aMqGxL5KW3BUivrIU1bzgJW8yUAfnkxvdc1TBLmMOWAUFouD6ZTKH6w3eIrks18uLuASFCdcw==
+  dependencies:
+    ember-cli-babel "^7.26.6"
+    ember-cli-typescript "^4.1.0"
+    ember-tracked-storage-polyfill "^1.0.0"
+    tracked-maps-and-sets "^3.0.2"
+
+tracked-maps-and-sets@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/tracked-maps-and-sets/-/tracked-maps-and-sets-3.0.2.tgz#6ea1b9f2a367d24f2e9905b74b24437fbce76ea6"
+  integrity sha512-UIRcWsX1kDOcC/Q2R58weYWlw01EnmWWBwUv3okWS+zMBvsgIfYoO6veHhuNE3hgzWCEImNp46QS5CyKnw5QUA==
+  dependencies:
+    "@glimmer/tracking" "^1.0.0"
+    ember-cli-babel "^7.26.6"
+    ember-cli-typescript "^4.2.1"
+    ember-tracked-storage-polyfill "1.0.0"
+
 tree-sync@^1.2.2:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/tree-sync/-/tree-sync-1.4.0.tgz#314598d13abaf752547d9335b8f95d9a137100d6"