From afa7273e3dc2672972b8091065795a18b8bbbe06 Mon Sep 17 00:00:00 2001
From: Chris Krycho <hello@chriskrycho.com>
Date: Wed, 21 Sep 2022 16:38:16 -0600
Subject: [PATCH] [FEATURE beta] Update to Ember 4.8

---
 package.json                                      | 2 +-
 packages/@ember/-internals/glimmer/lib/helper.ts  | 5 ++++-
 packages/@ember/-internals/metal/lib/libraries.ts | 2 +-
 yarn.lock                                         | 8 ++++----
 4 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/package.json b/package.json
index 77f0e11f918..34d42a657f4 100644
--- a/package.json
+++ b/package.json
@@ -157,7 +157,7 @@
     "simple-dom": "^1.4.0",
     "testem": "^3.8.0",
     "testem-failure-only-reporter": "^1.0.0",
-    "typescript": "~4.6.4"
+    "typescript": "~4.8.3"
   },
   "peerDependencies": {
     "@glimmer/component": "^1.1.2"
diff --git a/packages/@ember/-internals/glimmer/lib/helper.ts b/packages/@ember/-internals/glimmer/lib/helper.ts
index 9f720559e17..1f3483af9b1 100644
--- a/packages/@ember/-internals/glimmer/lib/helper.ts
+++ b/packages/@ember/-internals/glimmer/lib/helper.ts
@@ -105,7 +105,10 @@ class Helper extends FrameworkObject {
   static isHelperFactory = true;
   static [IS_CLASSIC_HELPER] = true;
 
-  [RECOMPUTE_TAG]: DirtyableTag;
+  // SAFETY: this is initialized in `init`, rather than `constructor`. It is
+  // safe to `declare` like this *if and only if* nothing uses the constructor
+  // directly in this class, since nothing else can run before `init`.
+  declare [RECOMPUTE_TAG]: DirtyableTag;
 
   init(properties: object | undefined) {
     super.init(properties);
diff --git a/packages/@ember/-internals/metal/lib/libraries.ts b/packages/@ember/-internals/metal/lib/libraries.ts
index d96ca2adf89..3b19532fc5b 100644
--- a/packages/@ember/-internals/metal/lib/libraries.ts
+++ b/packages/@ember/-internals/metal/lib/libraries.ts
@@ -86,7 +86,7 @@ if (DEBUG) {
     let nameLengths = libs.map((item) => get(item, 'name.length'));
     assert(
       'nameLengths is number array',
-      nameLengths instanceof Array && nameLengths.every((n) => typeof n === 'number')
+      nameLengths instanceof Array && nameLengths.every((n): n is number => typeof n === 'number')
     );
     let maxNameLength = Math.max.apply(null, nameLengths);
 
diff --git a/yarn.lock b/yarn.lock
index 9d217f1714b..c70261ec986 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10262,10 +10262,10 @@ typescript-memoize@^1.0.0-alpha.3, typescript-memoize@^1.0.1:
   resolved "https://registry.yarnpkg.com/typescript-memoize/-/typescript-memoize-1.1.0.tgz#4a8f512d06fc995167c703a3592219901db8bc79"
   integrity sha512-LQPKVXK8QrBBkL/zclE6YgSWn0I8ew5m0Lf+XL00IwMhlotqRLlzHV+BRrljVQIc+NohUAuQP7mg4HQwrx5Xbg==
 
-typescript@~4.6.4:
-  version "4.6.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.6.4.tgz#caa78bbc3a59e6a5c510d35703f6a09877ce45e9"
-  integrity sha512-9ia/jWHIEbo49HfjrLGfKbZSuWo9iTMwXO+Ca3pRsSpbsMbc7/IU8NKdCZVRRBafVPGnoJeFL76ZOAA84I9fEg==
+typescript@~4.8.3:
+  version "4.8.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.8.3.tgz#d59344522c4bc464a65a730ac695007fdb66dd88"
+  integrity sha512-goMHfm00nWPa8UvR/CPSvykqf6dVV8x/dp0c5mFTMTIu0u0FlGWRioyy7Nn0PGAdHxpJZnuO/ut+PpQ8UiHAig==
 
 uc.micro@^1.0.0, uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.6"