Enum RuntimeError 

pub enum RuntimeError {
    PoisonedLock(&'static str),
    Abandoned(&'static str),
    AlreadyCollected(&'static str),
}

Scheduler / host infrastructure error — not a bytecode flow fault.

Variants

PoisonedLock(&'static str)

A Mutex was poisoned: another thread panicked while holding it. Shared tables may be inconsistent; callers must not continue using them.

Abandoned(&'static str)

A flow was destroyed before it produced a crate::FlowOutcome, so the completion value its handle was waiting for will never arrive.

Reachable when the runtime shuts down while a flow is suspended (in the timer, in a worker deque, or parked in its mailbox): those flows are dropped without reaching finish. The alternative to reporting this is worse — a join() that blocks the embedder’s thread forever with no way to tell “still running” from “never will”.

AlreadyCollected(&'static str)

The outcome was already collected by an earlier non-consuming try_join / join_timeout, so there is nothing left to hand out.

Caller misuse rather than an infrastructure failure (kind A in the table above), reported here because it shares join’s return type. It exists so a second poll cannot be answered with Abandoned, which would blame the runtime for destroying a flow that in fact completed normally and was already observed.

Trait Implementations

impl Clone for RuntimeError

fn clone(&self) -> RuntimeError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RuntimeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for RuntimeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for RuntimeError

impl Error for RuntimeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for RuntimeError

fn eq(&self, other: &RuntimeError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RuntimeError