pub const PANIC_ERROR_CODE: i32 = -2;Expand description
The reserved error code reporting a producer panic.
Generated thunks wrap the producer call in catch_unwind; a panic is
reported through out_err with this code so the consumer can distinguish
“the producer has a bug” from any declared domain error. Validation rejects
error domains that try to claim a reserved code (0, which means success,
or any negative value).