ICE when using allocator API via reference

[mkroening]

Code

#![feature(allocator_api)]

pub fn foo() -> u8 {
    *Box::new_in(0, &std::alloc::Global)
}

Meta

rustc --version --verbose:

rustc 1.52.0-nightly (1705a7d64 2021-03-18)
binary: rustc
commit-hash: 1705a7d64b833d1c4b69958b0627bd054e6d764b
commit-date: 2021-03-18
host: x86_64-unknown-linux-gnu
release: 1.52.0-nightly
LLVM version: 12.0.0

Error output

thread 'rustc' panicked at 'assertion failed: i < this.fields.count()', /rustc/1705a7d64b833d1c4b69958b0627bd054e6d764b/compiler/rustc_middle/src/ty/layout.rs:2188:21
note: run with `RUST_BACKTRACE=1` environment variable to display a 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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.52.0-nightly (1705a7d64 2021-03-18) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack

Backtrace

   0: rust_begin_unwind
             at /rustc/1705a7d64b833d1c4b69958b0627bd054e6d764b/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/1705a7d64b833d1c4b69958b0627bd054e6d764b/library/core/src/panicking.rs:92:14
   2: core::panicking::panic
             at /rustc/1705a7d64b833d1c4b69958b0627bd054e6d764b/library/core/src/panicking.rs:50:5
   3: rustc_middle::ty::layout::<impl rustc_target::abi::TyAndLayoutMethods<C> for &rustc_middle::ty::TyS>::field::ty_and_layout_kind
   4: <rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS> as rustc_codegen_llvm::type_of::LayoutLlvmExt>::scalar_pair_element_llvm_type
   5: <rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS> as rustc_codegen_llvm::type_of::LayoutLlvmExt>::scalar_pair_element_llvm_type
   6: <rustc_target::abi::call::FnAbi<&rustc_middle::ty::TyS> as rustc_codegen_llvm::abi::FnAbiLlvmExt>::llvm_type
   7: rustc_codegen_llvm::mono_item::<impl rustc_codegen_ssa::traits::declare::PreDefineMethods for rustc_codegen_llvm::context::CodegenCx>::predefine_fn
   8: rustc_codegen_llvm::base::compile_codegen_unit::module_codegen
   9: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  10: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
  11: rustc_codegen_llvm::base::compile_codegen_unit
  12: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
  13: rustc_interface::passes::QueryContext::enter
  14: rustc_interface::queries::Queries::ongoing_codegen
  15: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  16: rustc_span::with_source_map
  17: rustc_interface::interface::create_compiler_and_run
  18: scoped_tls::ScopedKey<T>::set

[jyn514]

I think this is a duplicate of #78459.

[mkroening]

Indeed. Thanks!

Closing.