: this public module should not exist and is highly likely to disappear
rt module provides a narrow set of runtime services,
including the global heap (exported in
heap) and unwinding and
backtrace support. The APIs in this module are highly unstable,
and should be considered as private implementation details for the
Global storage for command line arguments
Simple backtrace functionality (to print on panic)
Implementation of Rust stack unwinding
The default error code of the rust runtime if the main thread panics instead of exiting cleanly.
Enqueues a procedure to run when the main thread exits.
One-time runtime cleanup.