Error codes · Caches, keys and invalidation

PW5104

listener_key

The program must hold to this: a listener's argument is one of its declaration's parameters, or _.

The decisions behind it

0091

Reading the diagnostic

pw check prints the code in brackets, [PW5104], with the sentence above and the place in your program. Errors and diagnostics explains how to read one, and every code is listed with its rule.