diff --git a/.github/workflows/accept-baselines-fix-lints.yaml b/.github/workflows/accept-baselines-fix-lints.yaml
index e9f554399a8ae..bae71c13560dc 100644
--- a/.github/workflows/accept-baselines-fix-lints.yaml
+++ b/.github/workflows/accept-baselines-fix-lints.yaml
@@ -21,7 +21,7 @@ jobs:
       deployment: false
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2a83a27129f98..340e6ad1d381e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,7 +107,7 @@ jobs:
     name: Test Node ${{ matrix.config.node-version }} on ${{ matrix.config.os }}${{ (!matrix.config.bundle && ' with --no-bundle') || '' }}
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Use node version ${{ matrix.config.node-version }}
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
@@ -142,7 +142,7 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -167,7 +167,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -180,7 +180,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -193,7 +193,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -213,7 +213,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -226,7 +226,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
@@ -269,11 +269,11 @@ jobs:
     if: github.event_name == 'pull_request'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           path: pr
 
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           path: base
           ref: ${{ github.base_ref }}
@@ -316,7 +316,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -332,7 +332,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -353,7 +353,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
diff --git a/.github/workflows/close-issues.yml b/.github/workflows/close-issues.yml
index fc6977904f81f..5db0656bce28c 100644
--- a/.github/workflows/close-issues.yml
+++ b/.github/workflows/close-issues.yml
@@ -28,7 +28,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
       - uses: azure/login@532459ea530d8321f2fb9bb10d1e0bcf23869a43 # v3.0.0
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index b93a67178cdba..da2999e25c39e 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -42,7 +42,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 21c2c6a973e4c..71347f0621b2d 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -15,7 +15,7 @@ jobs:
     # You can define any steps you want, and they will run before the agent starts.
     # If you do not check out your code, Copilot will do this for you.
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       - run: npm ci
       # pull dprint caches before network access is blocked
diff --git a/.github/workflows/create-cherry-pick-pr.yml b/.github/workflows/create-cherry-pick-pr.yml
index ae2a71db737a1..526706539a75c 100644
--- a/.github/workflows/create-cherry-pick-pr.yml
+++ b/.github/workflows/create-cherry-pick-pr.yml
@@ -51,7 +51,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           filter: blob:none # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
           fetch-depth: 0 # Default is 1; need to set to 0 to get the benefits of blob:none.
diff --git a/.github/workflows/insiders.yaml b/.github/workflows/insiders.yaml
index bc4c9b183f1ac..f9045cf39e89e 100644
--- a/.github/workflows/insiders.yaml
+++ b/.github/workflows/insiders.yaml
@@ -20,7 +20,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -42,7 +42,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
diff --git a/.github/workflows/lkg.yml b/.github/workflows/lkg.yml
index b56ea51c0f69c..ba0b3b27b8379 100644
--- a/.github/workflows/lkg.yml
+++ b/.github/workflows/lkg.yml
@@ -33,7 +33,7 @@ jobs:
             exit 1
           fi
 
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: ${{ inputs.branch_name }}
           persist-credentials: false
diff --git a/.github/workflows/new-release-branch.yaml b/.github/workflows/new-release-branch.yaml
index 6085645499ca1..8aac9c8d0064a 100644
--- a/.github/workflows/new-release-branch.yaml
+++ b/.github/workflows/new-release-branch.yaml
@@ -54,7 +54,7 @@ jobs:
       deployment: false
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           filter: blob:none # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
           fetch-depth: 0 # Default is 1; need to set to 0 to get the benefits of blob:none.
diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index 8219ee2f21094..5627baf235b54 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -21,7 +21,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
@@ -42,7 +42,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
diff --git a/.github/workflows/pr-modified-files.yml b/.github/workflows/pr-modified-files.yml
index a3406c0575b36..19b19c200668c 100644
--- a/.github/workflows/pr-modified-files.yml
+++ b/.github/workflows/pr-modified-files.yml
@@ -41,7 +41,7 @@ jobs:
       REPO: ${{ github.repository }}
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
       - uses: azure/login@532459ea530d8321f2fb9bb10d1e0bcf23869a43 # v3.0.0
diff --git a/.github/workflows/release-branch-artifact.yaml b/.github/workflows/release-branch-artifact.yaml
index 6e65c7ec7d1d6..42a50cba8f864 100644
--- a/.github/workflows/release-branch-artifact.yaml
+++ b/.github/workflows/release-branch-artifact.yaml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 83dd107d76460..49d590321f686 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: 'Checkout code'
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/set-version.yaml b/.github/workflows/set-version.yaml
index e1c8ecea96ec3..c1a328c60c2ee 100644
--- a/.github/workflows/set-version.yaml
+++ b/.github/workflows/set-version.yaml
@@ -53,7 +53,7 @@ jobs:
       name: azure
       deployment: false
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: ${{ inputs.branch_name }}
           persist-credentials: false
diff --git a/.github/workflows/sync-branch.yaml b/.github/workflows/sync-branch.yaml
index 9ee3158d700aa..9a104d555c8da 100644
--- a/.github/workflows/sync-branch.yaml
+++ b/.github/workflows/sync-branch.yaml
@@ -49,7 +49,7 @@ jobs:
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 'lts/*'
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           ref: ${{ inputs.branch_name }}
           filter: blob:none # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
diff --git a/.github/workflows/sync-wiki.yml b/.github/workflows/sync-wiki.yml
index a312206c5d5e8..4734270c63c69 100644
--- a/.github/workflows/sync-wiki.yml
+++ b/.github/workflows/sync-wiki.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Get repo name
         run: R=${GITHUB_REPOSITORY%?wiki}; echo "BASENAME=${R##*/}" >> $GITHUB_ENV
       - name: Checkout ${{ env.BASENAME }}-wiki
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           repository: '${{ github.repository_owner }}/${{ env.BASENAME }}-wiki'
           fetch-depth: 0
diff --git a/.github/workflows/twoslash-repros.yaml b/.github/workflows/twoslash-repros.yaml
deleted file mode 100644
index 2c1c089f72f0d..0000000000000
--- a/.github/workflows/twoslash-repros.yaml
+++ /dev/null
@@ -1,89 +0,0 @@
-name: Twoslash Code Sample Repros
-
-on:
-  schedule:
-    - cron: '0 8 * * *'
-  repository_dispatch:
-    types: [run-twoslash-repros]
-  workflow_dispatch:
-    inputs:
-      issue:
-        description: Limits run to a single issue.
-        required: false
-        type: string
-      bisect:
-        description: If set, runs a git bisect on an existing repro. Requires 'issue' to be set. Value can be revision labels (e.g. `good v4.7.3 bad main`) or `true` to infer bisect range.
-        required: false
-        type: string
-
-      # Inputs provided by the bot
-      distinct_id:
-        description: '(bot) A distinct ID'
-        required: false
-        default: ''
-      source_issue:
-        description: '(bot) The issue that triggered this workflow'
-        required: false
-        default: ''
-      requesting_user:
-        description: '(bot) The user who requested this workflow'
-        required: false
-        default: ''
-      status_comment:
-        description: '(bot) The comment to update with the status of this workflow'
-        required: false
-        default: ''
-
-run-name: ${{ github.workflow }}${{ inputs.distinct_id && format(' (bot run {0})', inputs.distinct_id) || '' }}
-
-permissions:
-  contents: read
-  id-token: write
-
-# Ensure scripts are run with pipefail. See:
-# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference
-defaults:
-  run:
-    shell: bash
-
-jobs:
-  run:
-    if: ${{ github.repository == 'microsoft/TypeScript' }}
-    runs-on: ubuntu-latest
-    environment:
-      name: azure
-      deployment: false
-    steps:
-      - if: ${{ github.event.inputs.bisect }}
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-        with:
-          filter: blob:none # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
-          fetch-depth: 0 # Default is 1; need to set to 0 to get the benefits of blob:none.
-          persist-credentials: false
-      - if: ${{ !github.event.inputs.bisect }}
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-        with:
-          persist-credentials: false
-      - uses: azure/login@532459ea530d8321f2fb9bb10d1e0bcf23869a43 # v3.0.0
-        with:
-          client-id: ${{ vars.AZURE_CLIENT_ID }}
-          tenant-id: ${{ vars.AZURE_TENANT_ID }}
-          subscription-id: ${{ vars.AZURE_SUBSCRIPTION_ID }}
-      - name: Create GitHub App token
-        id: app-token
-        uses: microsoft/create-github-app-token-via-key-vault@5ba0d436e9c3cac52feff4d1f2f66f9698ce4a2d # v1
-        with:
-          client-id: ${{ vars.TYPESCRIPT_AUTOMATION_GITHUB_APP_CLIENT_ID }}
-          key-id: ${{ vars.TYPESCRIPT_AUTOMATION_GITHUB_APP_KEY_ID }}
-          owner: microsoft
-          repositories: TypeScript
-          permission-contents: write
-          permission-issues: write
-      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
-        with:
-          node-version: 'lts/*'
-      - uses: microsoft/TypeScript-Twoslash-Repro-Action@master
-        with:
-          github-token: ${{ steps.app-token.outputs.token }}
-          issue: ${{ github.event.inputs.issue }}
-          bisect: ${{ github.event.inputs.bisect }}
diff --git a/.github/workflows/update-package-lock.yaml b/.github/workflows/update-package-lock.yaml
index 9722544840702..cfb4e8a2cb5ac 100644
--- a/.github/workflows/update-package-lock.yaml
+++ b/.github/workflows/update-package-lock.yaml
@@ -26,7 +26,7 @@ jobs:
     if: github.repository == 'microsoft/TypeScript'
 
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
index 343df39ad9cbc..c4e20bb055e28 100644
--- a/src/compiler/scanner.ts
+++ b/src/compiler/scanner.ts
@@ -3915,7 +3915,7 @@ export function createScanner(
 
         if (isIdentifierStart(ch, languageVersion)) {
             let char = ch;
-            while (pos < end && isIdentifierPart(char = codePointUnchecked(pos), languageVersion) || char === CharacterCodes.minus) pos += charSize(char);
+            while (pos < end && (isIdentifierPart(char = codePointUnchecked(pos), languageVersion) || char === CharacterCodes.minus)) pos += charSize(char);
             tokenValue = text.substring(tokenStart, pos);
             if (char === CharacterCodes.backslash) {
                 tokenValue += scanIdentifierParts();
diff --git a/src/lib/es2015.collection.d.ts b/src/lib/es2015.collection.d.ts
index a01b21dded868..cbc5219f5d79b 100644
--- a/src/lib/es2015.collection.d.ts
+++ b/src/lib/es2015.collection.d.ts
@@ -106,8 +106,17 @@ interface SetConstructor {
 declare var Set: SetConstructor;
 
 interface ReadonlySet<T> {
+    /**
+     * Executes a provided function once per each value in the ReadonlySet object, in insertion order.
+     */
     forEach(callbackfn: (value: T, value2: T, set: ReadonlySet<T>) => void, thisArg?: any): void;
+    /**
+     * @returns a boolean indicating whether an element with the specified value exists in the Set or not.
+     */
     has(value: T): boolean;
+    /**
+     * @returns the number of (unique) elements in the Set.
+     */
     readonly size: number;
 }
 
diff --git a/src/lib/es2018.intl.d.ts b/src/lib/es2018.intl.d.ts
index 9bfa24d277b0b..22676d6ef5a7e 100644
--- a/src/lib/es2018.intl.d.ts
+++ b/src/lib/es2018.intl.d.ts
@@ -31,7 +31,6 @@ declare namespace Intl {
 
     interface PluralRulesConstructor {
         new (locales?: string | readonly string[], options?: PluralRulesOptions): PluralRules;
-        (locales?: string | readonly string[], options?: PluralRulesOptions): PluralRules;
         supportedLocalesOf(locales: string | readonly string[], options?: { localeMatcher?: "lookup" | "best fit"; }): string[];
     }
 
diff --git a/src/lib/es2020.intl.d.ts b/src/lib/es2020.intl.d.ts
index 727dc64644612..f706490761d47 100644
--- a/src/lib/es2020.intl.d.ts
+++ b/src/lib/es2020.intl.d.ts
@@ -449,7 +449,6 @@ declare namespace Intl {
 
     interface PluralRulesConstructor {
         new (locales?: LocalesArgument, options?: PluralRulesOptions): PluralRules;
-        (locales?: LocalesArgument, options?: PluralRulesOptions): PluralRules;
 
         supportedLocalesOf(locales: LocalesArgument, options?: { localeMatcher?: "lookup" | "best fit"; }): string[];
     }
diff --git a/src/testRunner/unittests/comments.ts b/src/testRunner/unittests/comments.ts
index a1eeeb8aacfa1..0193826938b60 100644
--- a/src/testRunner/unittests/comments.ts
+++ b/src/testRunner/unittests/comments.ts
@@ -11,6 +11,7 @@ describe("comment parsing", () => {
     const withTrailing = `;/* comment */
 // another one
 `;
+    const endingInHyphen = "/**comment-*/";
     it("skips shebang", () => {
         const result = ts.getLeadingCommentRanges(withShebang, 0);
         assert.isDefined(result);
@@ -29,4 +30,16 @@ describe("comment parsing", () => {
         assert.strictEqual(result.length, 1);
         assert.strictEqual(result[0].kind, ts.SyntaxKind.SingleLineCommentTrivia);
     });
+
+    it("parses /** block comments ending in hyphen", () => {
+        const sourceFile = ts.createSourceFile(
+            "file.ts",
+            `${endingInHyphen}\nconst x = 1;`,
+            ts.ScriptTarget.ESNext,
+            /*setParentNodes*/ true,
+        );
+
+        assert.strictEqual(sourceFile.parseDiagnostics.length, 0);
+        assert.strictEqual(sourceFile.statements.length, 1);
+    });
 });