error[E0670]: `async fn` is not permitted in Rust 2015 --> /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:2:5 | 2 | async fn bar(&self) -> i32; | ^^^^^ to use `async fn`, switch to Rust 2018 or later | = help: pass `--edition 2021` to `rustc` = note: for more on editions, read https://doc.rust-lang.org/edition-guide error[E0670]: `async fn` is not permitted in Rust 2015 --> /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:6:5 | 6 | async fn MyTrait(&self) -> i32 { | ^^^^^ to use `async fn`, switch to Rust 2018 or later | = help: pass `--edition 2021` to `rustc` = note: for more on editions, read https://doc.rust-lang.org/edition-guide error[E0670]: `async fn` is not permitted in Rust 2015 --> /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:10:5 | 10 | async fn bar(&self) -> i32 {} | ^^^^^ to use `async fn`, switch to Rust 2018 or later | = help: pass `--edition 2021` to `rustc` = note: for more on editions, read https://doc.rust-lang.org/edition-guide error[E0407]: method `MyTrait` is not a member of trait `MyTrait` --> /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:6:5 | 6 | / async fn MyTrait(&self) -> i32 { 7 | | *self 8 | | } | |_____^ not a member of trait `MyTrait` error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:11:2 | 11 | } | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs` thread 'rustc' panicked at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/compiler/rustc_privacy/src/lib.rs:1774:13: assertion `left == right` failed left: AssocFn right: Closure stack backtrace: 0: 0x7f8891f8aedc - std::backtrace_rs::backtrace::libunwind::trace::h4aa006547432fe3e at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 1: 0x7f8891f8aedc - std::backtrace_rs::backtrace::trace_unsynchronized::hf7201be28f6c27c2 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7f8891f8aedc - std::sys_common::backtrace::_print_fmt::h0cd8a143bef670cf at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7f8891f8aedc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::ha91f52f52d796a13 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys_common/backtrace.rs:44:22 4: 0x7f8891fde040 - core::fmt::rt::Argument::fmt::hdde011a0bd4392af at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/core/src/fmt/rt.rs:142:9 5: 0x7f8891fde040 - core::fmt::write::h5e781cf6866d3648 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/core/src/fmt/mod.rs:1120:17 6: 0x7f8891f7edef - std::io::Write::write_fmt::h9a2947799664dd03 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/io/mod.rs:1810:15 7: 0x7f8891f8acc4 - std::sys_common::backtrace::_print::h3370570567099b55 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys_common/backtrace.rs:47:5 8: 0x7f8891f8acc4 - std::sys_common::backtrace::print::h7d65fcf71bbcffc2 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys_common/backtrace.rs:34:9 9: 0x7f8891f8d987 - std::panicking::default_hook::{{closure}}::h5494d1902ea01b77 10: 0x7f8891f8d6ef - std::panicking::default_hook::h41df66896c085068 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/panicking.rs:292:9 11: 0x7f8894d68210 - std[25382dfd2a072775]::panicking::update_hook::<alloc[280cef7c9c4d1494]::boxed::Box<rustc_driver_impl[ee97d3c831c39013]::install_ice_hook::{closure#0}>>::{closure#0} 12: 0x7f8891f8e0a6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd7509255f1dd7a52 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/alloc/src/boxed.rs:2029:9 13: 0x7f8891f8e0a6 - std::panicking::rust_panic_with_hook::h4df8865e41d9c2e8 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/panicking.rs:783:13 14: 0x7f8891f8ddfc - std::panicking::begin_panic_handler::{{closure}}::hd37df855ea4500f6 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/panicking.rs:657:13 15: 0x7f8891f8b396 - std::sys_common::backtrace::__rust_end_short_backtrace::ha411a8bd9892a2d7 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys_common/backtrace.rs:171:18 16: 0x7f8891f8db80 - rust_begin_unwind at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/panicking.rs:645:5 17: 0x7f8891fda745 - core::panicking::panic_fmt::hd7672b9c583e7546 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/core/src/panicking.rs:72:14 18: 0x7f8891fdacdb - core::panicking::assert_failed_inner::hcd6e15a64204aba0 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/core/src/panicking.rs:342:17 19: 0x7f889509aa0b - core[f0c809df4423c390]::panicking::assert_failed::<rustc_hir[f0d1db495241573d]::def::DefKind, rustc_hir[f0d1db495241573d]::def::DefKind> 20: 0x7f88974f5e96 - <rustc_privacy[457c624ad30a0311]::provide::{closure#0} as core[f0c809df4423c390]::ops::function::FnOnce<(rustc_middle[6d381e14aaf01dd0]::ty::context::TyCtxt, rustc_span[bacf4852791a5a5]::def_id::LocalDefId)>>::call_once.llvm.14723649760234986019.cold.0 21: 0x7f88969503f0 - rustc_query_impl[e7cdedc87b77f1f0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7cdedc87b77f1f0]::query_impl::visibility::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 8usize]>> 22: 0x7f8896088014 - rustc_query_system[5b4abf955d71912a]::query::plumbing::try_execute_query::<rustc_query_impl[e7cdedc87b77f1f0]::DynamicConfig<rustc_query_system[5b4abf955d71912a]::query::caches::DefaultCache<rustc_span[bacf4852791a5a5]::def_id::DefId, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7cdedc87b77f1f0]::plumbing::QueryCtxt, false> 23: 0x7f889608761e - rustc_query_impl[e7cdedc87b77f1f0]::query_impl::visibility::get_query_non_incr::__rust_end_short_backtrace 24: 0x7f88960cb283 - <rustc_privacy[457c624ad30a0311]::DefIdVisitorSkeleton<rustc_privacy[457c624ad30a0311]::ReachEverythingInTheInterfaceVisitor> as rustc_type_ir[44dc4dc99f375282]::visit::TypeVisitor<rustc_middle[6d381e14aaf01dd0]::ty::context::TyCtxt>>::visit_ty 25: 0x7f889645eff5 - <rustc_privacy[457c624ad30a0311]::EmbargoVisitor as rustc_hir[f0d1db495241573d]::intravisit::Visitor>::visit_item 26: 0x7f889645cb8a - <rustc_middle[6d381e14aaf01dd0]::hir::map::Map>::visit_all_item_likes_in_crate::<rustc_privacy[457c624ad30a0311]::EmbargoVisitor> 27: 0x7f8896040810 - rustc_privacy[457c624ad30a0311]::effective_visibilities 28: 0x7f8896040675 - rustc_query_impl[e7cdedc87b77f1f0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7cdedc87b77f1f0]::query_impl::effective_visibilities::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 8usize]>> 29: 0x7f8896ce0572 - rustc_query_system[5b4abf955d71912a]::query::plumbing::try_execute_query::<rustc_query_impl[e7cdedc87b77f1f0]::DynamicConfig<rustc_query_system[5b4abf955d71912a]::query::caches::SingleCache<rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7cdedc87b77f1f0]::plumbing::QueryCtxt, false> 30: 0x7f8896ce0e86 - rustc_query_impl[e7cdedc87b77f1f0]::query_impl::effective_visibilities::get_query_non_incr::__rust_end_short_backtrace 31: 0x7f88966e3e7b - rustc_hir_analysis[2c57fcbec73706b1]::check::check::check_impl_items_against_trait 32: 0x7f8896ce7dcc - rustc_hir_analysis[2c57fcbec73706b1]::check::check::check_mod_item_types 33: 0x7f8896ce7a31 - rustc_query_impl[e7cdedc87b77f1f0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7cdedc87b77f1f0]::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 0usize]>> 34: 0x7f8896c5253b - rustc_query_system[5b4abf955d71912a]::query::plumbing::try_execute_query::<rustc_query_impl[e7cdedc87b77f1f0]::DynamicConfig<rustc_query_system[5b4abf955d71912a]::query::caches::DefaultCache<rustc_span[bacf4852791a5a5]::def_id::LocalModDefId, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[e7cdedc87b77f1f0]::plumbing::QueryCtxt, false> 35: 0x7f8896c51f17 - rustc_query_impl[e7cdedc87b77f1f0]::query_impl::check_mod_item_types::get_query_non_incr::__rust_end_short_backtrace 36: 0x7f8896a0f823 - rustc_hir_analysis[2c57fcbec73706b1]::check_crate 37: 0x7f889694bbd7 - rustc_interface[dbc5283c63a93da8]::passes::analysis 38: 0x7f889694b81d - rustc_query_impl[e7cdedc87b77f1f0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7cdedc87b77f1f0]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 1usize]>> 39: 0x7f8896fb4db2 - rustc_query_system[5b4abf955d71912a]::query::plumbing::try_execute_query::<rustc_query_impl[e7cdedc87b77f1f0]::DynamicConfig<rustc_query_system[5b4abf955d71912a]::query::caches::SingleCache<rustc_middle[6d381e14aaf01dd0]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e7cdedc87b77f1f0]::plumbing::QueryCtxt, false> 40: 0x7f8896fb4bb9 - rustc_query_impl[e7cdedc87b77f1f0]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 41: 0x7f889704cef1 - rustc_interface[dbc5283c63a93da8]::interface::run_compiler::<core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>, rustc_driver_impl[ee97d3c831c39013]::run_compiler::{closure#0}>::{closure#0} 42: 0x7f8896fc11c6 - std[25382dfd2a072775]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[dbc5283c63a93da8]::util::run_in_thread_with_globals<rustc_interface[dbc5283c63a93da8]::util::run_in_thread_pool_with_globals<rustc_interface[dbc5283c63a93da8]::interface::run_compiler<core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>, rustc_driver_impl[ee97d3c831c39013]::run_compiler::{closure#0}>::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>>::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>> 43: 0x7f8896fc0ff3 - <<std[25382dfd2a072775]::thread::Builder>::spawn_unchecked_<rustc_interface[dbc5283c63a93da8]::util::run_in_thread_with_globals<rustc_interface[dbc5283c63a93da8]::util::run_in_thread_pool_with_globals<rustc_interface[dbc5283c63a93da8]::interface::run_compiler<core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>, rustc_driver_impl[ee97d3c831c39013]::run_compiler::{closure#0}>::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>>::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[f0c809df4423c390]::result::Result<(), rustc_span[bacf4852791a5a5]::ErrorGuaranteed>>::{closure#1} as core[f0c809df4423c390]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 44: 0x7f8891f97ef5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::haedb32b43ffd86c4 at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/alloc/src/boxed.rs:2015:9 45: 0x7f8891f97ef5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::had410a5deb0b83ea at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/alloc/src/boxed.rs:2015:9 46: 0x7f8891f97ef5 - std::sys::unix::thread::Thread::new::thread_start::h84df661860ff711f at /rustc/8681e077b8afa99d60acf8f8470a012a3ce709a5/library/std/src/sys/unix/thread.rs:108:17 47: 0x7f8891d849eb - <unknown> 48: 0x7f8891e087cc - <unknown> 49: 0x0 - <unknown> error: the compiler unexpectedly panicked. this is a bug. note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md note: rustc 1.76.0-nightly (8681e077b 2023-12-18) running on x86_64-unknown-linux-gnu query stack during panic: #0 [visibility] computing visibility of `<impl at /tmp/icemaker_global_tempdir.11SBEZ78Tsfu/rustc_testrunner_tmpdir_reporting.GGifX7KAr0cn/mvce.rs:5:1: 5:21>::MyTrait` #1 [effective_visibilities] checking effective visibilities #2 [check_mod_item_types] checking item types in top-level module #3 [analysis] running analysis passes on this crate end of query stack error: aborting due to 5 previous errors Some errors have detailed explanations: E0407, E0601, E0670. For more information about an error, try `rustc --explain E0407`.