tokio: Failed to spawn tasks in dynamic library in plugins system

Version

tokio = { version = “0.2.4”, features = [“full”] }

Platform

macOS, v10.15.1

Subcrates

runtime

Description

• Make a crate with crate-type = [“dylib”]
• Export a function return an async function with tokio::spawn call in it.
• Load the dylib in another crate and call the exported function.
• Exception raised as below:

thread '<unnamed>' panicked at 'must be called from the context of Tokio runtime configured with either `basic_scheduler` or `threaded_scheduler`', /Users/gary/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.4/src/runtime/global.rs:50:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

If switch the runtime to async-std and call async_std::task::spawn, it works fine.

Please check test project: https://github.com/garyhai/async-plugins-test.git