add 18048 error

mike-north · Sep 30, 2023 · 7601fd4 · 7601fd4
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diff --git a/packages/website/content/blog/fundamentals-v3/09-functions/index.md b/packages/website/content/blog/fundamentals-v3/09-functions/index.md
@@ -342,7 +342,7 @@ Imagine if we were passing this value through several other functions before rea
 type checking alerted us to a problem!
 
 ```ts twoslash
-// @errors: 2531 2339 2532
+// @errors: 2531 2339 2532 18048
 type JSONPrimitive = string | number | boolean | null
 type JSONObject = { [k: string]: JSONValue }
 type JSONArray = JSONValue[]

diff --git a/packages/website/content/blog/fundamentals-v3/13-nullish-values/index.md b/packages/website/content/blog/fundamentals-v3/13-nullish-values/index.md
@@ -75,7 +75,7 @@ operator just tells TypeScript to ignore that possibility.
 If the value _does_ turn out to be missing, you will get the familiar `cannot call foo on undefined` family of errors at runtime:
 
 ```ts twoslash
-// @errors: 2532
+// @errors: 2532 18048
 type GroceryCart = {
   fruits?: { name: string; qty: number }[]
   vegetables?: { name: string; qty: number }[]

diff --git a/...e/content/blog/making-typescript-stick/03-recent-updates-to-typescript/index.md b/...e/content/blog/making-typescript-stick/03-recent-updates-to-typescript/index.md
@@ -331,7 +331,7 @@ d.rhubarb.join(", ") // 💥
 My advice was to explicitly type it as
 
 ```ts twoslash
-// @errors: 2532
+// @errors: 2532 18048
 type Dict<T> = { [K: string]: T | undefined }
 const d: Dict<string[]> = {}
 d.rhubarb.join(", ") // 💥