Error codes · Effects

PW0407

set_pair_shape

The program must hold to this: a keyed read's set form is a function of the same source, given a list of its key and answering a list of its results, each with its key.

Reading the diagnostic

pw check prints the code in brackets, [PW0407], 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.