S0073: invalid request handler pattern

Generated from rellum-diagnostics/src/db.rs.

Explanation

Request handlers must match the raw shape returned by the requested effect. Option-returning effects use some/none handlers; Result-returning effects use ok/err handlers; plain values do not support handlers.

Common causes

• using ok or err handlers for an Option request
• using some or none handlers for a Result request
• adding handlers to a request whose effect returns a plain value

Canonical fixes

• use handlers that match the request result shape

Before:

value ~ request env!("NAME")
    on ok(v) => v
    on err(_) => ""

After:

value ~ request env!("NAME")
    on some(v) => v
    on none => ""

• remove handlers when the effect returns a plain value

Code example

value ~ request env!("NAME")
    on ok(v) => v
    on err(_) => ""

Links

• RellC diagnostic overview