ice: effects: `ConstContext::Maybe must have host effect param'`

[matthiaskrgr]

Code

#![feature(const_closures, const_trait_imp, effectsl)]
#![allow(incomplete_features)]

trait Foo {
    fn foo(&self);
}

impl Foo for () {
    fn foo(&self) {}
}

fn main() {
    (const || { (()).foo() })();
    //~^ ERROR: cannot call non-const fn
}

Meta

rustc --version --verbose:

rustc 1.72.0-nightly (e4cd16100 2023-07-05)
binary: rustc
commit-hash: e4cd1610067501fa4d347eba7b18f77137dbbf48
commit-date: 2023-07-05
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.5

Error output

Backtrace

thread 'rustc' panicked at 'ConstContext::Maybe must have host effect param', compiler/rustc_hir_typeck/src/callee.rs:775:44
stack backtrace:
   0:     0x7f861c3efa81 - std::backtrace_rs::backtrace::libunwind::trace::hd0180fafc3f67189
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f861c3efa81 - std::backtrace_rs::backtrace::trace_unsynchronized::h5f5f542cfcd3ea93
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f861c3efa81 - std::sys_common::backtrace::_print_fmt::h58fe9485d729332b
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f861c3efa81 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h892fa574703406ce
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f861c455d8f - core::fmt::rt::Argument::fmt::h9323d9ac1296ca86
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/fmt/rt.rs:138:9
   5:     0x7f861c455d8f - core::fmt::write::h7b3311fc7bec7011
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f861c3e24c7 - std::io::Write::write_fmt::hf0bd33b3cf0f8fc8
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/io/mod.rs:1714:15
   7:     0x7f861c3ef895 - std::sys_common::backtrace::_print::h05e7ce29169ad453
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f861c3ef895 - std::sys_common::backtrace::print::h259bd490e3a5f495
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f861c3f2673 - std::panicking::default_hook::{{closure}}::h60419100c25d1f9e
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/panicking.rs:269:22
  10:     0x7f861c3f2404 - std::panicking::default_hook::h5458ac0b23f9b258
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/panicking.rs:288:9
  11:     0x7f861b23634b - rustc_driver_impl[e2bfb106dcd1f64f]::install_ice_hook::{closure#0}
  12:     0x7f861c3f2e9e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4fc06bcacf328e1a
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/alloc/src/boxed.rs:2024:9
  13:     0x7f861c3f2e9e - std::panicking::rust_panic_with_hook::hc4b8011c5070ed88
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/panicking.rs:709:13
  14:     0x7f861c3f2c27 - std::panicking::begin_panic_handler::{{closure}}::h49c3f3c1bfbdf6f5
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/panicking.rs:597:13
  15:     0x7f861c3efee6 - std::sys_common::backtrace::__rust_end_short_backtrace::hd9eda361758b8cc0
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7f861c3f2972 - rust_begin_unwind
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/panicking.rs:593:5
  17:     0x7f861c451fe3 - core::panicking::panic_fmt::h35522819180bdf02
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/panicking.rs:67:14
  18:     0x7f861c451d43 - core::panicking::panic_display::h4bea1be2f25ddc5b
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/panicking.rs:150:5
  19:     0x7f861c451d43 - core::panicking::panic_str::hdec2e3f2e5f11b66
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/panicking.rs:134:5
  20:     0x7f861c451d43 - core::option::expect_failed::hac3f5abcdb20b93f
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/core/src/option.rs:1952:5
  21:     0x7f8619752243 - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_kind
  22:     0x7f8619758f2f - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_with_expectation
  23:     0x7f861979324e - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_block_with_expected
  24:     0x7f86197494bf - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_kind
  25:     0x7f8619758f2f - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_with_expectation
  26:     0x7f8619bb926d - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_return_expr
  27:     0x7f8619bb0651 - rustc_hir_typeck[f6dc91c3434d623d]::check::check_fn
  28:     0x7f86197cef97 - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_closure
  29:     0x7f861974c841 - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_kind
  30:     0x7f861991a344 - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  31:     0x7f861990463f - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_call
  32:     0x7f861974895a - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_kind
  33:     0x7f8619758f2f - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_with_expectation
  34:     0x7f8619793031 - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_block_with_expected
  35:     0x7f86197494bf - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_kind
  36:     0x7f8619758f2f - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_expr_with_expectation
  37:     0x7f8619bb926d - <rustc_hir_typeck[f6dc91c3434d623d]::fn_ctxt::FnCtxt>::check_return_expr
  38:     0x7f8619bb0651 - rustc_hir_typeck[f6dc91c3434d623d]::check::check_fn
  39:     0x7f8619b973f3 - rustc_hir_typeck[f6dc91c3434d623d]::typeck
  40:     0x7f861925d86c - rustc_query_impl[b274d6131f7b1f90]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b274d6131f7b1f90]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 8usize]>>
  41:     0x7f861925d84e - <rustc_query_impl[b274d6131f7b1f90]::query_impl::typeck::dynamic_query::{closure#2} as core[1877eeee917502d9]::ops::function::FnOnce<(rustc_middle[36f410a133de2eee]::ty::context::TyCtxt, rustc_span[ffa356b4eef30eb1]::def_id::LocalDefId)>>::call_once
  42:     0x7f8619384e2d - rustc_query_system[d3399df1ed0f61e2]::query::plumbing::try_execute_query::<rustc_query_impl[b274d6131f7b1f90]::DynamicConfig<rustc_query_system[d3399df1ed0f61e2]::query::caches::VecCache<rustc_span[ffa356b4eef30eb1]::def_id::LocalDefId, rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b274d6131f7b1f90]::plumbing::QueryCtxt, false>
  43:     0x7f861abad6e1 - rustc_query_impl[b274d6131f7b1f90]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  44:     0x7f86193cc54d - rustc_query_impl[b274d6131f7b1f90]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b274d6131f7b1f90]::query_impl::used_trait_imports::dynamic_query::{closure#2}::{closure#0}, rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 8usize]>>
  45:     0x7f86193cc4ae - <rustc_query_impl[b274d6131f7b1f90]::query_impl::used_trait_imports::dynamic_query::{closure#2} as core[1877eeee917502d9]::ops::function::FnOnce<(rustc_middle[36f410a133de2eee]::ty::context::TyCtxt, rustc_span[ffa356b4eef30eb1]::def_id::LocalDefId)>>::call_once
  46:     0x7f8619384e2d - rustc_query_system[d3399df1ed0f61e2]::query::plumbing::try_execute_query::<rustc_query_impl[b274d6131f7b1f90]::DynamicConfig<rustc_query_system[d3399df1ed0f61e2]::query::caches::VecCache<rustc_span[ffa356b4eef30eb1]::def_id::LocalDefId, rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b274d6131f7b1f90]::plumbing::QueryCtxt, false>
  47:     0x7f861abb2201 - rustc_query_impl[b274d6131f7b1f90]::query_impl::used_trait_imports::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7f861a67a065 - rustc_hir_analysis[efec7ea34622ed25]::check_unused::check_crate
  49:     0x7f861a677611 - rustc_hir_analysis[efec7ea34622ed25]::check_crate
  50:     0x7f861a66e64a - rustc_interface[b03e5b36acd0a493]::passes::analysis
  51:     0x7f861a6f958a - rustc_query_impl[b274d6131f7b1f90]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b274d6131f7b1f90]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 1usize]>>
  52:     0x7f861a6f9579 - <rustc_query_impl[b274d6131f7b1f90]::query_impl::analysis::dynamic_query::{closure#2} as core[1877eeee917502d9]::ops::function::FnOnce<(rustc_middle[36f410a133de2eee]::ty::context::TyCtxt, ())>>::call_once
  53:     0x7f861a892e88 - rustc_query_system[d3399df1ed0f61e2]::query::plumbing::try_execute_query::<rustc_query_impl[b274d6131f7b1f90]::DynamicConfig<rustc_query_system[d3399df1ed0f61e2]::query::caches::SingleCache<rustc_middle[36f410a133de2eee]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[b274d6131f7b1f90]::plumbing::QueryCtxt, false>
  54:     0x7f861a892c59 - rustc_query_impl[b274d6131f7b1f90]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  55:     0x7f861a462545 - <rustc_middle[36f410a133de2eee]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>
  56:     0x7f861a461b72 - <rustc_interface[b03e5b36acd0a493]::interface::Compiler>::enter::<rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}::{closure#2}, core[1877eeee917502d9]::result::Result<core[1877eeee917502d9]::option::Option<rustc_interface[b03e5b36acd0a493]::queries::Linker>, rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>
  57:     0x7f861a458885 - rustc_span[ffa356b4eef30eb1]::set_source_map::<core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>, rustc_interface[b03e5b36acd0a493]::interface::run_compiler<core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>, rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  58:     0x7f861a4582f6 - <scoped_tls[d5e856d8f723ce14]::ScopedKey<rustc_span[ffa356b4eef30eb1]::SessionGlobals>>::set::<rustc_interface[b03e5b36acd0a493]::interface::run_compiler<core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>, rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}>::{closure#0}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>
  59:     0x7f861a4578bc - std[c4949d010b2b12f5]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[b03e5b36acd0a493]::util::run_in_thread_pool_with_globals<rustc_interface[b03e5b36acd0a493]::interface::run_compiler<core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>, rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}>::{closure#0}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>
  60:     0x7f861a457685 - <<std[c4949d010b2b12f5]::thread::Builder>::spawn_unchecked_<rustc_interface[b03e5b36acd0a493]::util::run_in_thread_pool_with_globals<rustc_interface[b03e5b36acd0a493]::interface::run_compiler<core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>, rustc_driver_impl[e2bfb106dcd1f64f]::run_compiler::{closure#1}>::{closure#0}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[1877eeee917502d9]::result::Result<(), rustc_span[ffa356b4eef30eb1]::ErrorGuaranteed>>::{closure#1} as core[1877eeee917502d9]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  61:     0x7f861c3fd315 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha34cb32f4acd27b7
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/alloc/src/boxed.rs:2010:9
  62:     0x7f861c3fd315 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h309fb4796a356ecf
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/alloc/src/boxed.rs:2010:9
  63:     0x7f861c3fd315 - std::sys::unix::thread::Thread::new::thread_start::h947cced02a86e329
                               at /rustc/e4cd1610067501fa4d347eba7b18f77137dbbf48/library/std/src/sys/unix/thread.rs:108:17
  64:     0x7f8617e9d44b - <unknown>
  65:     0x7f8617f20e40 - <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 1.72.0-nightly (e4cd16100 2023-07-05) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z crate-attr=feature(effects)

query stack during panic:
#0 [typeck] type-checking `main`
#1 [used_trait_imports] finding used_trait_imports `main`
#2 [analysis] running analysis passes on this crate
end of query stack

[JohnTitor]

Fixed on the latest nightly, marking as E-needs-test (or, feel free to close if we have a sufficient regression test)
@rustbot labels: +E-needs-test