E0371
The program imports a std module that has no runtime yet: std.proc or std.sql, used or not. Spans the module path of the use.
Machine-applicable fix: none.
Example
This program fails with E0371.
use std.sql
fn main() {}
Fixed
The same program, fixed.
use std.html
fn main() {}
Listed in the runtime notes. oskac explain E0371 prints this entry offline.