ICE: unexpected res Err in variant_of_res -Zsave-analysis

[matthiaskrgr]

Code

reduced from ./src/test/compile-fail/issue-52443.rs

fn main() {
    [(); { for _ in 0usize.. {}; 0}];
}

Meta

rustc --version --verbose:

rustc 1.49.0-nightly (20b1e05a8 2020-10-27)
binary: rustc
commit-hash: 20b1e05a8d0e1773dc840a3286aa37916e87d84b
commit-date: 2020-10-27
host: x86_64-unknown-linux-gnu
release: 1.49.0-nightly

Error output

  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |                     ^^^^^^^^ calling non-const function `<RangeFrom<usize> as IntoIterator>::into_iter`

error: internal compiler error: compiler/rustc_middle/src/ty/mod.rs:2499:18: unexpected res Err in variant_of_res

thread 'rustc' panicked at 'Box<Any>', compiler/rustc_errors/src/lib.rs:945:9
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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.49.0-nightly (20b1e05a8 2020-10-27) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z save-analysis

query stack during panic:
end of query stack
error: aborting due to 6 previous errors

Some errors have detailed explanations: E0015, E0080, E0744, E0764.
For more information about an error, try `rustc --explain E0015`.

Backtrace

error[E0744]: `for` is not allowed in a `const`
 --> ./src/test/compile-fail/issue-52443.rs:4:12
  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |            ^^^^^^^^^^^^^^^^^^^^

error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
 --> ./src/test/compile-fail/issue-52443.rs:4:21
  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |                     ^^^^^^^^

error[E0764]: mutable references are not allowed in constants
 --> ./src/test/compile-fail/issue-52443.rs:4:21
  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |                     ^^^^^^^^ `&mut` is only allowed in `const fn`

error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
 --> ./src/test/compile-fail/issue-52443.rs:4:21
  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |                     ^^^^^^^^

error[E0080]: evaluation of constant value failed
 --> ./src/test/compile-fail/issue-52443.rs:4:21
  |
4 |     [(); { for _ in 0usize.. {}; 0}];
  |                     ^^^^^^^^ calling non-const function `<RangeFrom<usize> as IntoIterator>::into_iter`

error: internal compiler error: compiler/rustc_middle/src/ty/mod.rs:2499:18: unexpected res Err in variant_of_res

thread 'rustc' panicked at 'Box<Any>', compiler/rustc_errors/src/lib.rs:945:9
stack backtrace:
   0:     0x7f99a38e5b70 - std::backtrace_rs::backtrace::libunwind::trace::h448c56741b6011d3
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:100:5
   1:     0x7f99a38e5b70 - std::backtrace_rs::backtrace::trace_unsynchronized::h881b9d30a8a89a0c
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f99a38e5b70 - std::sys_common::backtrace::_print_fmt::h720a2f61f75b9f58
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f99a38e5b70 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h8d62bbfda6d5c836
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x7f99a3955aac - core::fmt::write::h1857a60b204f1b6a
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/core/src/fmt/mod.rs:1076:17
   5:     0x7f99a38d77d2 - std::io::Write::write_fmt::h16a9fe7680ac245c
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/io/mod.rs:1516:15
   6:     0x7f99a38eab25 - std::sys_common::backtrace::_print::h9ba51a6db618de7d
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x7f99a38eab25 - std::sys_common::backtrace::print::h5f20e41c85e91716
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x7f99a38eab25 - std::panicking::default_hook::{{closure}}::h8d48653392f3b04c
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/panicking.rs:208:50
   9:     0x7f99a38ea7c8 - std::panicking::default_hook::hb3948d1f74b6ff4c
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/panicking.rs:227:9
  10:     0x7f99a41b2818 - rustc_driver::report_ice::h1ddbc5609a6e1f37
  11:     0x7f99a38eb426 - std::panicking::rust_panic_with_hook::h55d23fef0ad751bc
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/panicking.rs:597:17
  12:     0x7f99a71afedd - std::panicking::begin_panic::{{closure}}::h4b123e1d8e3ae463
  13:     0x7f99a71afe16 - std::sys_common::backtrace::__rust_end_short_backtrace::ha21fec08f03d728b
  14:     0x7f99a71afeaf - std::panicking::begin_panic::hc0c81fab1e0acd00
  15:     0x7f99a71c1e10 - rustc_errors::HandlerInner::bug::h26f9bc1a7147687e
  16:     0x7f99a71c0960 - rustc_errors::Handler::bug::h2149bffe74600666
  17:     0x7f99a6c1e524 - rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}::hb4ddd0d3902006f3
  18:     0x7f99a6c1804b - rustc_middle::ty::context::tls::with_opt::{{closure}}::ha7f81bc36cab3c9f
  19:     0x7f99a6c17a02 - rustc_middle::ty::context::tls::with_opt::hf0c2c2aff96e53ba
  20:     0x7f99a6c1e449 - rustc_middle::util::bug::opt_span_bug_fmt::hc7cbb029c2646db9
  21:     0x7f99a6c1e3be - rustc_middle::util::bug::bug_fmt::hb51c412c48cda8bb
  22:     0x7f99a6d44a5d - rustc_middle::ty::AdtDef::variant_of_res::h259763dd211c8955
  23:     0x7f99a428de55 - <rustc_save_analysis::dump_visitor::DumpVisitor as rustc_hir::intravisit::Visitor>::visit_pat::h396f8a14b519e84b
  24:     0x7f99a4282208 - rustc_save_analysis::dump_visitor::DumpVisitor::process_var_decl::hf3b485ed4161a3a9
  25:     0x7f99a427a575 - rustc_hir::intravisit::walk_expr::h29ec3071e7090d2a
  26:     0x7f99a427a50c - rustc_hir::intravisit::walk_expr::h29ec3071e7090d2a
  27:     0x7f99a427a55b - rustc_hir::intravisit::walk_expr::h29ec3071e7090d2a
  28:     0x7f99a427a5cc - rustc_hir::intravisit::walk_expr::h29ec3071e7090d2a
  29:     0x7f99a428d627 - <rustc_save_analysis::dump_visitor::DumpVisitor as rustc_hir::intravisit::Visitor>::visit_expr::h163167f860c5f921
  30:     0x7f99a427a5cc - rustc_hir::intravisit::walk_expr::h29ec3071e7090d2a
  31:     0x7f99a4289977 - <rustc_save_analysis::dump_visitor::DumpVisitor as rustc_hir::intravisit::Visitor>::visit_item::h4731934b9cd5939e
  32:     0x7f99a42835d1 - rustc_save_analysis::dump_visitor::DumpVisitor::process_crate::h51daa9a55197960f
  33:     0x7f99a4137352 - rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps::h9c13a3484429d101
  34:     0x7f99a41f6571 - std::thread::local::LocalKey<T>::with::h1cf4c836994c87d8
  35:     0x7f99a41479ce - rustc_session::utils::<impl rustc_session::session::Session>::time::he9ff6f3455ac3386
  36:     0x7f99a41f44a9 - rustc_interface::passes::QueryContext::enter::h72869665c9dfb2e6
  37:     0x7f99a41cf5fd - rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter::h25b522245624a405
  38:     0x7f99a4192d5f - rustc_span::with_source_map::h7455fffe3cd153a4
  39:     0x7f99a41ca851 - scoped_tls::ScopedKey<T>::set::h8ae8151712a551fd
  40:     0x7f99a41d4f85 - std::sys_common::backtrace::__rust_begin_short_backtrace::h26de371bc27662fc
  41:     0x7f99a41542de - core::ops::function::FnOnce::call_once{{vtable.shim}}::h674a38f3420d24cb
  42:     0x7f99a38fa42a - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9e7afb7a0a438236
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/alloc/src/boxed.rs:1312:9
  43:     0x7f99a38fa42a - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h70c646c4271337a1
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/alloc/src/boxed.rs:1312:9
  44:     0x7f99a38fa42a - std::sys::unix::thread::Thread::new::thread_start::h35d2b8d36f210d02
                               at /rustc/20b1e05a8d0e1773dc840a3286aa37916e87d84b/library/std/src/sys/unix/thread.rs:89:17
  45:     0x7f99a37f93e9 - start_thread
  46:     0x7f99a3716293 - __GI___clone
  47:                0x0 - <unknown>

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 1.49.0-nightly (20b1e05a8 2020-10-27) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z save-analysis

query stack during panic:
end of query stack
error: aborting due to 6 previous errors

Some errors have detailed explanations: E0015, E0080, E0744, E0764.
For more information about an error, try `rustc --explain E0015`.

[jyn514]

Save-analysis has been removed from the compiler.