Closed
Description
snippet:
async fn foo() -> i32 {
if false {
return Ok(6);
}
5
}Version information
rustc 1.75.0-nightly (151256bd4 2023-10-24)
binary: rustc
commit-hash: 151256bd4b577f92922c0fbdf94b12d69cfb08d3
commit-date: 2023-10-24
host: x86_64-unknown-linux-gnu
release: 1.75.0-nightly
LLVM version: 17.0.3
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
error[E0670]: `async fn` is not permitted in Rust 2015
--> /tmp/icemaker_global_tempdir.ZU4fQKJN0tkY/rustc_testrunner_tmpdir_reporting.uCeeA8ozkRl0/mvce.rs:1:1
|
1 | async fn foo() -> 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[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.ZU4fQKJN0tkY/rustc_testrunner_tmpdir_reporting.uCeeA8ozkRl0/mvce.rs:7:2
|
7 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.ZU4fQKJN0tkY/rustc_testrunner_tmpdir_reporting.uCeeA8ozkRl0/mvce.rs`
thread 'rustc' panicked at compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs:1755:62:
already mutably borrowed: BorrowError
stack backtrace:
0: 0x7fb3c596917c - std::backtrace_rs::backtrace::libunwind::trace::hcc0166ed719b5803
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7fb3c596917c - std::backtrace_rs::backtrace::trace_unsynchronized::hbbfdb0cdfd5a3694
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7fb3c596917c - std::sys_common::backtrace::_print_fmt::h2acdf0dd6d88fb6d
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys_common/backtrace.rs:67:5
3: 0x7fb3c596917c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h8c769e1ecfb97334
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7fb3c59cb400 - core::fmt::rt::Argument::fmt::h0b648738cd9c3905
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/core/src/fmt/rt.rs:142:9
5: 0x7fb3c59cb400 - core::fmt::write::h8a5a209f873b8707
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/core/src/fmt/mod.rs:1117:17
6: 0x7fb3c595d00f - std::io::Write::write_fmt::h78561a5ec2d97aeb
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/io/mod.rs:1762:15
7: 0x7fb3c5968f64 - std::sys_common::backtrace::_print::ha6123e36392a6105
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7fb3c5968f64 - std::sys_common::backtrace::print::h1b26d911e86a441a
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7fb3c596bbf7 - std::panicking::default_hook::{{closure}}::h0eac92245a13cc26
10: 0x7fb3c596b95f - std::panicking::default_hook::ha6311ff3ada643b9
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/panicking.rs:292:9
11: 0x7fb3c84c47b0 - std[59eea237a8c90763]::panicking::update_hook::<alloc[63ea5590ce573fa8]::boxed::Box<rustc_driver_impl[4dab64b5eaf3dea0]::install_ice_hook::{closure#0}>>::{closure#0}
12: 0x7fb3c596c338 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6c50cfa831996edb
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/alloc/src/boxed.rs:2021:9
13: 0x7fb3c596c338 - std::panicking::rust_panic_with_hook::h57526d95e3d6ee7d
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/panicking.rs:735:13
14: 0x7fb3c596c08e - std::panicking::begin_panic_handler::{{closure}}::h0e4be4e1cec2f135
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/panicking.rs:609:13
15: 0x7fb3c5969646 - std::sys_common::backtrace::__rust_end_short_backtrace::h5b8d993df457b165
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys_common/backtrace.rs:170:18
16: 0x7fb3c596bdf2 - rust_begin_unwind
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/panicking.rs:597:5
17: 0x7fb3c59c7b25 - core::panicking::panic_fmt::h6845268c474f8c17
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/core/src/panicking.rs:72:14
18: 0x7fb3c59c4399 - core::cell::panic_already_mutably_borrowed::hf576b634f1a52691
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/core/src/cell.rs:770:5
19: 0x7fb3c8677be7 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::suggest_missing_unwrap_expect
20: 0x7fb3c864be3e - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::emit_type_mismatch_suggestions
21: 0x7fb3c864c7c5 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::emit_coerce_suggestions
22: 0x7fb3ca0b2a06 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_return_expr
23: 0x7fb3ca0b5096 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
24: 0x7fb3c9bb0f59 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_block_with_expected
25: 0x7fb3ca0b3f23 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
26: 0x7fb3ca0b5224 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
27: 0x7fb3c9bb2516 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_block_with_expected
28: 0x7fb3ca0b3f23 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
29: 0x7fb3ca0b566c - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
30: 0x7fb3c9bb1019 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_block_with_expected
31: 0x7fb3ca0b3f23 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
32: 0x7fb3c9de6dd2 - rustc_hir_typeck[ce3649d5ecae49b1]::check::check_fn
33: 0x7fb3ca03b124 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_closure
34: 0x7fb3ca0b7729 - <rustc_hir_typeck[ce3649d5ecae49b1]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
35: 0x7fb3c9de6dd2 - rustc_hir_typeck[ce3649d5ecae49b1]::check::check_fn
36: 0x7fb3c98fe526 - rustc_hir_typeck[ce3649d5ecae49b1]::typeck
37: 0x7fb3c98fd9bd - rustc_query_impl[cc19e181f2c3ddb7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cc19e181f2c3ddb7]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>
38: 0x7fb3c974702c - rustc_query_system[1e36878fdb69a02b]::query::plumbing::try_execute_query::<rustc_query_impl[cc19e181f2c3ddb7]::DynamicConfig<rustc_query_system[1e36878fdb69a02b]::query::caches::VecCache<rustc_span[a9e0b1e4bb2a439]::def_id::LocalDefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[cc19e181f2c3ddb7]::plumbing::QueryCtxt, false>
39: 0x7fb3c9746d10 - rustc_query_impl[cc19e181f2c3ddb7]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
40: 0x7fb3ca03f105 - rustc_hir_analysis[6111f3b64fe2cd70]::collect::type_of::type_of_opaque
41: 0x7fb3ca03f01b - rustc_query_impl[cc19e181f2c3ddb7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cc19e181f2c3ddb7]::query_impl::type_of_opaque::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>
42: 0x7fb3c9669cc5 - rustc_query_system[1e36878fdb69a02b]::query::plumbing::try_execute_query::<rustc_query_impl[cc19e181f2c3ddb7]::DynamicConfig<rustc_query_system[1e36878fdb69a02b]::query::caches::DefaultCache<rustc_span[a9e0b1e4bb2a439]::def_id::DefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[cc19e181f2c3ddb7]::plumbing::QueryCtxt, false>
43: 0x7fb3ca4ca6de - rustc_query_impl[cc19e181f2c3ddb7]::query_impl::type_of_opaque::get_query_non_incr::__rust_end_short_backtrace
44: 0x7fb3c971e6b7 - rustc_middle[ecb43faa60cb20bb]::query::plumbing::query_get_at::<rustc_query_system[1e36878fdb69a02b]::query::caches::DefaultCache<rustc_span[a9e0b1e4bb2a439]::def_id::DefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>>
45: 0x7fb3c966cc09 - rustc_hir_analysis[6111f3b64fe2cd70]::collect::type_of::type_of
46: 0x7fb3c966a929 - rustc_query_impl[cc19e181f2c3ddb7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cc19e181f2c3ddb7]::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>
47: 0x7fb3c9669cc5 - rustc_query_system[1e36878fdb69a02b]::query::plumbing::try_execute_query::<rustc_query_impl[cc19e181f2c3ddb7]::DynamicConfig<rustc_query_system[1e36878fdb69a02b]::query::caches::DefaultCache<rustc_span[a9e0b1e4bb2a439]::def_id::DefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[cc19e181f2c3ddb7]::plumbing::QueryCtxt, false>
48: 0x7fb3c96698eb - rustc_query_impl[cc19e181f2c3ddb7]::query_impl::type_of::get_query_non_incr::__rust_end_short_backtrace
49: 0x7fb3c971e6b7 - rustc_middle[ecb43faa60cb20bb]::query::plumbing::query_get_at::<rustc_query_system[1e36878fdb69a02b]::query::caches::DefaultCache<rustc_span[a9e0b1e4bb2a439]::def_id::DefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 8usize]>>>
50: 0x7fb3ca1395db - rustc_hir_analysis[6111f3b64fe2cd70]::check::check::check_mod_item_types
51: 0x7fb3ca137f79 - rustc_query_impl[cc19e181f2c3ddb7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cc19e181f2c3ddb7]::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 0usize]>>
52: 0x7fb3ca135eb4 - rustc_query_system[1e36878fdb69a02b]::query::plumbing::try_execute_query::<rustc_query_impl[cc19e181f2c3ddb7]::DynamicConfig<rustc_query_system[1e36878fdb69a02b]::query::caches::DefaultCache<rustc_span[a9e0b1e4bb2a439]::def_id::LocalModDefId, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[cc19e181f2c3ddb7]::plumbing::QueryCtxt, false>
53: 0x7fb3ca135843 - rustc_query_impl[cc19e181f2c3ddb7]::query_impl::check_mod_item_types::get_query_non_incr::__rust_end_short_backtrace
54: 0x7fb3c99ef51b - rustc_hir_analysis[6111f3b64fe2cd70]::check_crate
55: 0x7fb3c9bfec1f - rustc_interface[a6146946eb64d03a]::passes::analysis
56: 0x7fb3c9bfe621 - rustc_query_impl[cc19e181f2c3ddb7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cc19e181f2c3ddb7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 1usize]>>
57: 0x7fb3ca122c26 - rustc_query_system[1e36878fdb69a02b]::query::plumbing::try_execute_query::<rustc_query_impl[cc19e181f2c3ddb7]::DynamicConfig<rustc_query_system[1e36878fdb69a02b]::query::caches::SingleCache<rustc_middle[ecb43faa60cb20bb]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[cc19e181f2c3ddb7]::plumbing::QueryCtxt, false>
58: 0x7fb3ca122a55 - rustc_query_impl[cc19e181f2c3ddb7]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
59: 0x7fb3ca30300d - std[59eea237a8c90763]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[a6146946eb64d03a]::util::run_in_thread_with_globals<rustc_interface[a6146946eb64d03a]::interface::run_compiler<core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>, rustc_driver_impl[4dab64b5eaf3dea0]::run_compiler::{closure#1}>::{closure#0}, core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>>
60: 0x7fb3ca3022f3 - <<std[59eea237a8c90763]::thread::Builder>::spawn_unchecked_<rustc_interface[a6146946eb64d03a]::util::run_in_thread_with_globals<rustc_interface[a6146946eb64d03a]::interface::run_compiler<core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>, rustc_driver_impl[4dab64b5eaf3dea0]::run_compiler::{closure#1}>::{closure#0}, core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7a9d9f52bc7b45fb]::result::Result<(), rustc_span[a9e0b1e4bb2a439]::ErrorGuaranteed>>::{closure#1} as core[7a9d9f52bc7b45fb]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
61: 0x7fb3c5977105 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1e5011952b28f75a
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/alloc/src/boxed.rs:2007:9
62: 0x7fb3c5977105 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha8fd064af386c0c4
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/alloc/src/boxed.rs:2007:9
63: 0x7fb3c5977105 - std::sys::unix::thread::Thread::new::thread_start::h8b6a97c3db8ef5a6
at /rustc/151256bd4b577f92922c0fbdf94b12d69cfb08d3/library/std/src/sys/unix/thread.rs:108:17
64: 0x7fb3c57409eb - <unknown>
65: 0x7fb3c57c47cc - <unknown>
66: 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 1.75.0-nightly (151256bd4 2023-10-24) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [typeck] type-checking `foo`
#1 [type_of_opaque] computing type of opaque `foo::{opaque#0}`
#2 [type_of] computing type of `foo::{opaque#0}`
#3 [check_mod_item_types] checking item types in top-level module
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0601, E0670.
For more information about an error, try `rustc --explain E0601`.