E0340
A module's export written unqualified, such as Db after a plain use std.sql, which imports only the module. Spans the name.
Machine-applicable fix: Qualify it with the module's name: sql.Db.
Example
This program fails with E0340.
use std.sql
fn run(q: SqlLiteral) {}
Fixed
The same program, fixed.
use std.sql
fn run(q: sql.SqlLiteral) {}
Listed in the checker notes. oskac explain E0340 prints this entry offline.