multi profile (#4532)

* multi-profile work

* another test

* clean up

* cover a quirk with a test

* last of tests

* fix typos

* Fix source range in snap test

---------

Co-authored-by: Jonathan Tran <jonnytran@gmail.com>

src/lib/trap.ts

@@ -97,3 +97,7 @@ export function trap<T>(
     })
   return true
 }
+
+export function reject(errOrString: Error | string): Promise<never> {
+  return Promise.reject(errOrString)
+}