Open
Description
The following ICE's in nightly:
#![feature(unsized_fn_params)]
fn main() {
let f: fn([u8]) = |_| {};
let slice: Box<[u8]> = Box::new([1; 8]);
f(*slice);
}
Backtrace:
Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at 'tried to statically allocate unsized place', src/librustc_codegen_ssa/mir/place.rs:55:9
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:77
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:1057
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1426
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:195
9: std::panicking::default_hook
at src/libstd/panicking.rs:215
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:476
12: std::panicking::begin_panic
13: rustc_codegen_ssa::mir::place::PlaceRef<V>::alloca
14: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
15: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T,I>>::from_iter
16: rustc_codegen_ssa::mir::codegen_mir
17: <rustc::mir::mono::MonoItem as rustc_codegen_ssa::mono_item::MonoItemExt>::define
18: rustc_codegen_llvm::base::compile_codegen_unit::module_codegen
19: rustc::dep_graph::graph::DepGraph::with_task
20: rustc_codegen_llvm::base::compile_codegen_unit
21: rustc_codegen_ssa::base::codegen_crate
22: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate
23: rustc_interface::passes::start_codegen::{{closure}}
24: rustc::util::common::time
25: rustc_interface::passes::start_codegen
26: rustc::ty::context::tls::enter_global
27: rustc_interface::queries::Queries::ongoing_codegen
28: rustc_interface::interface::run_compiler_in_existing_thread_pool
29: scoped_tls::ScopedKey<T>::set
30: syntax::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
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 1.42.0-nightly (da3629b05 2019-12-29) running on x86_64-unknown-linux-gnu
note: compiler flags: -C codegen-units=1 -C debuginfo=2 --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack
error: could not compile `playground`.