Error when using a function with const generics with a literal parameter #71516
Description
Code
#![feature(const_generics)] struct Foo; impl Foo { fn foo<const N: usize>(&self) {} } fn main() { Foo.foo::<0usize>(); }Meta
rustc --version --verbose:
rustc 1.44.0-nightly (14b15521c 2020-04-23) binary: rustc commit-hash: 14b15521c52549ebbb113173b4abecd124b5a823 commit-date: 2020-04-23 host: x86_64-unknown-linux-gnu release: 1.44.0-nightly LLVM version: 9.0 Error output
Compiling plop v0.1.0 (/tmp/plop) warning: the feature `const_generics` is incomplete and may cause the compiler to crash --> src/main.rs:1:12 | 1 | #![feature(const_generics)] | ^^^^^^^^^^^^^^ | = note: `#[warn(incomplete_features)]` on by default error: internal compiler error: src/librustc_codegen_llvm/context.rs:850: failed to get layout for `[type error]`: the type `[type error]` has an unknown layout thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:904:9 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace 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 1.44.0-nightly (14b15521c 2020-04-23) running on x86_64-unknown-linux-gnu note: compiler flags: -C bitcode-in-rlib=no -C debuginfo=2 -C incremental --crate-type bin note: some of the compiler flags provided by cargo are hidden error: aborting due to previous error; 1 warning emitted error: could not compile `plop`. To learn more, run the command again with --verbose. Backtrace
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:904:9 stack backtrace: 0: backtrace::backtrace::libunwind::trace at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 1: backtrace::backtrace::trace_unsynchronized at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 2: std::sys_common::backtrace::_print_fmt at src/libstd/sys_common/backtrace.rs:78 3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt at src/libstd/sys_common/backtrace.rs:59 4: core::fmt::write at src/libcore/fmt/mod.rs:1069 5: std::io::Write::write_fmt at src/libstd/io/mod.rs:1504 6: std::sys_common::backtrace::_print at src/libstd/sys_common/backtrace.rs:62 7: std::sys_common::backtrace::print at src/libstd/sys_common/backtrace.rs:49 8: std::panicking::default_hook::{{closure}} at src/libstd/panicking.rs:198 9: std::panicking::default_hook at src/libstd/panicking.rs:218 10: rustc_driver::report_ice 11: std::panicking::rust_panic_with_hook at src/libstd/panicking.rs:515 12: std::panicking::begin_panic 13: rustc_errors::HandlerInner::bug 14: rustc_errors::Handler::bug 15: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}} 16: rustc_middle::ty::context::tls::with_opt::{{closure}} 17: rustc_middle::ty::context::tls::with_opt 18: rustc_middle::util::bug::opt_span_bug_fmt 19: rustc_middle::util::bug::bug_fmt 20: <rustc_codegen_llvm::context::CodegenCx as rustc_target::abi::LayoutOf>::spanned_layout_of::{{closure}} 21: <rustc_codegen_llvm::context::CodegenCx as rustc_target::abi::LayoutOf>::spanned_layout_of 22: rustc_codegen_ssa::mir::analyze::non_ssa_locals 23: rustc_codegen_ssa::mir::codegen_mir 24: <rustc_middle::mir::mono::MonoItem as rustc_codegen_ssa::mono_item::MonoItemExt>::define 25: rustc_codegen_llvm::base::compile_codegen_unit::module_codegen 26: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps 27: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task 28: rustc_codegen_llvm::base::compile_codegen_unit 29: rustc_codegen_ssa::base::codegen_crate 30: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate 31: rustc_session::utils::<impl rustc_session::session::Session>::time 32: rustc_interface::passes::start_codegen 33: rustc_middle::ty::context::tls::enter_global 34: rustc_interface::queries::Queries::ongoing_codegen 35: rustc_interface::interface::run_compiler_in_existing_thread_pool 36: scoped_tls::ScopedKey<T>::set 37: rustc_ast::attr::with_globals