refactor: log critical never (#2015)

* refactor: log critical never

* changeset

---------

Co-authored-by: YaroShkvorets <[email protected]>

Author: PaulRBerg

.changeset/old-times-double.md

@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-ts': patch
+---
+
+changed log(CRITICAL) return type to `never` for compiler flow analysis

packages/ts/index.ts

@@ -103,8 +103,10 @@ export namespace log {
    * @param msg Format string a la "Value = {}, other = {}".
    * @param args Format string arguments.
    */
-  export function critical(msg: string, args: Array<string>): void {
-    log.log(Level.CRITICAL, format(msg, args));
+  export function critical(msg: string, args: Array<string>): never {
+    const message = format(msg, args);
+    log.log(Level.CRITICAL, message);
+    throw new Error(message);
   }
 
   /**