SIFR-PYCB-0001: A Python callback lifetime, dispatch, concurrency, or owner declaration is invalid. - Sifr

SIFR-PYCB-0001 belongs to the Python-to-Sifr callbacks diagnostic family. It means: a Python callback lifetime, dispatch, concurrency, or owner declaration is invalid.

Why It Happens

A Python-to-Sifr callback lifetime, dispatch, or closure contract was violated.

Use sifr --explain SIFR-PYCB-0001 locally to see the renderer’s exact message template and any machine-applicable suggestions for the compiler version you are running.

Details

Field	Value
Code	`SIFR-PYCB-0001`
Family	`PYCB`
Severity	Error
Stability	stable
Owner	`sifr_lowering`
Representative fixture	`crates/sifr_lowering/src/lower/python_interop_callback_tests.rs::callback_policy_validates_before_reservation`

See the Error Codes index for the complete catalog.