Check that a send-side frame field (header or payload) can be represented by the u32 wire length prefix. Deliberately NOT symmetric with =is_frame_len_valid=: the 64 MiB inbound cap guards against an untrusted peer's request sizes, while outbound frames are sized by the worker itself and legitimately carry bulk COPY_SOLUTION replies far beyond 64 MiB (audit 2026-07-06 N1).
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| integer(kind=int64), | intent(in) | :: | n |