Closed
Description
In tests/tests.rs:
#![feature(async_await)]
#[test]
fn non_stupid() {
async { true }.wait();
}when compiling with cargo rustc --test tests -- -Zunstable-options --pretty=expanded
Along with an empty src/lib.rs and the following Cargo.toml:
cargo-features = ["edition"]
[package]
name = "test"
edition = "2018"
version = "0.1.0"Results in:
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', libcore/option.rs:345:21
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
1: std::sys_common::backtrace::print
2: std::panicking::default_hook::{{closure}}
3: std::panicking::default_hook
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
6: std::panicking::continue_panic_fmt
7: rust_begin_unwind
8: core::panicking::panic_fmt
9: core::panicking::panic
10: syntax::print::pprust::State::print_expr_outer_attr_style
11: syntax::print::pprust::State::print_stmt
12: syntax::print::pprust::State::print_block_maybe_unclosed
13: syntax::print::pprust::State::print_item
14: syntax::print::pprust::print_crate
15: rustc_driver::pretty::print_after_hir_lowering::{{closure}}
16: rustc_driver::pretty::print_after_hir_lowering
17: <rustc_driver::RustcDefaultCalls as rustc_driver::CompilerCalls<'a>>::build_controller::{{closure}}
18: rustc_driver::driver::compile_input
19: rustc_driver::run_compiler_with_pool
20: syntax::with_globals
21: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
22: __rust_maybe_catch_panic
23: rustc_driver::run
24: rustc_driver::main
25: std::rt::lang_start::{{closure}}
26: std::panicking::try::do_call
27: __rust_maybe_catch_panic
28: std::rt::lang_start_internal
29: main
30: __libc_start_main
31: <unknown>
query stack during panic:
end of query stack
error: aborting due to 8 previous errors
Some errors occurred: E0412, E0422, E0425, E0433.
For more information about an error, try `rustc --explain E0412`.
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.30.0-nightly (d767ee116 2018-08-15) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z unstable-options -C debuginfo=2 -C incremental
note: some of the compiler flags provided by cargo are hidden
error: Could not compile `test`.