ICE with cfg_eval + stmt_expr_attributes

[jruderman]

Found by mutating cfg-eval-fail.rs with my fork of fuzz-rustc.

Code

#![feature(cfg_eval)]
#![feature(stmt_expr_attributes)]

#[cfg_eval]
fn main() {
    #[cfg_eval]
    let _ = #[cfg(FALSE)] 0;
    //~^ ERROR removing an expression is not supported in this position
}

Error output

error: removing an expression is not supported in this position

error: expected expression, found ;

thread 'rustc' panicked at 'called Option::unwrap() on a None value', compiler/rustc_builtin_macros/src/cfg_eval.rs:169

Full output including backtrace

error: removing an expression is not supported in this position
 --> asn.rs:7:13
  |
7 |     let _ = #[cfg(FALSE)] 0;
  |             ^^^^^^^^^^^^^

error: expected expression, found `;`
 --> asn.rs:7:28
  |
7 |     let _ = #[cfg(FALSE)] 0;
  |                            ^ expected expression

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_builtin_macros/src/cfg_eval.rs:169:44
stack backtrace:
   0:        0x109a09406 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7aeb894505898234
   1:        0x109a67dca - core::fmt::write::hb0aa72ff55d6ae53
   2:        0x1099fb7ac - std::io::Write::write_fmt::h1945469b78b865f8
   3:        0x109a091ea - std::sys_common::backtrace::print::h85c2438dfd145403
   4:        0x109a0c553 - std::panicking::default_hook::{{closure}}::hdd077715d2b82795
   5:        0x109a0c2a8 - std::panicking::default_hook::he8d3e4e56f8c52ec
   6:        0x1124c502d - rustc_driver[2d5e2c84e80eab0e]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x109a0cd37 - std::panicking::rust_panic_with_hook::h48c87533cff0c7b5
   8:        0x109a0caa3 - std::panicking::begin_panic_handler::{{closure}}::h03e0170622ddc3a5
   9:        0x109a098a8 - std::sys_common::backtrace::__rust_end_short_backtrace::h27a5e4055100ab18
  10:        0x109a0c7ad - _rust_begin_unwind
  11:        0x109a942a3 - core::panicking::panic_fmt::hd88a77e190c81c5c
  12:        0x109a94377 - core::panicking::panic::h5b884905bd1ddb5d
  13:        0x115391fe4 - <<rustc_builtin_macros[f6004bc8d2ed7f37]::cfg_eval::CfgEval>::configure_annotatable::{closure#4} as core[430c2907dc9a6903]::ops::function::FnOnce<(&mut rustc_parse[ccb6115b14db88e3]::parser::Parser,)>>::call_once
  14:        0x115392859 - rustc_builtin_macros[f6004bc8d2ed7f37]::cfg_eval::cfg_eval
  15:        0x115391d61 - <rustc_builtin_macros[f6004bc8d2ed7f37]::cfg_eval::expand as rustc_expand[93ec35c3241e2602]::base::MultiItemModifier>::expand
  16:        0x11662d4a7 - <rustc_expand[93ec35c3241e2602]::expand::MacroExpander>::fully_expand_fragment
  17:        0x11662b723 - <rustc_expand[93ec35c3241e2602]::expand::MacroExpander>::expand_crate
  18:        0x1125c6a9a - <rustc_session[b3c342af35a3ea6a]::session::Session>::time::<core[430c2907dc9a6903]::result::Result<rustc_ast[1df583a4c38224cd]::ast::Crate, rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_interface[f59f2966aecfe0a5]::passes::configure_and_expand::{closure#1}>
  19:        0x11256a9c6 - rustc_interface[f59f2966aecfe0a5]::passes::configure_and_expand
  20:        0x1125724f0 - <rustc_interface[f59f2966aecfe0a5]::queries::Queries>::expansion
  21:        0x11249d3d7 - <rustc_interface[f59f2966aecfe0a5]::interface::Compiler>::enter::<rustc_driver[2d5e2c84e80eab0e]::run_compiler::{closure#1}::{closure#2}, core[430c2907dc9a6903]::result::Result<core[430c2907dc9a6903]::option::Option<rustc_interface[f59f2966aecfe0a5]::queries::Linker>, rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>
  22:        0x112437a5d - rustc_span[157adb1f3d5a28e2]::with_source_map::<core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_interface[f59f2966aecfe0a5]::interface::run_compiler<core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_driver[2d5e2c84e80eab0e]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  23:        0x11249040d - <scoped_tls[86ec2be37ea12d20]::ScopedKey<rustc_span[157adb1f3d5a28e2]::SessionGlobals>>::set::<rustc_interface[f59f2966aecfe0a5]::interface::run_compiler<core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_driver[2d5e2c84e80eab0e]::run_compiler::{closure#1}>::{closure#0}, core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>
  24:        0x11245f86a - std[cffeb5472d7fcddb]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f59f2966aecfe0a5]::util::run_in_thread_pool_with_globals<rustc_interface[f59f2966aecfe0a5]::interface::run_compiler<core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_driver[2d5e2c84e80eab0e]::run_compiler::{closure#1}>::{closure#0}, core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>
  25:        0x112441795 - <<std[cffeb5472d7fcddb]::thread::Builder>::spawn_unchecked_<rustc_interface[f59f2966aecfe0a5]::util::run_in_thread_pool_with_globals<rustc_interface[f59f2966aecfe0a5]::interface::run_compiler<core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>, rustc_driver[2d5e2c84e80eab0e]::run_compiler::{closure#1}>::{closure#0}, core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[430c2907dc9a6903]::result::Result<(), rustc_errors[17a2ca97c979a6e5]::ErrorGuaranteed>>::{closure#1} as core[430c2907dc9a6903]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  26:        0x109a16007 - std::sys::unix::thread::Thread::new::thread_start::hd82b4d9ec5e0369f
  27:     0x7ff8083354e1 - __pthread_start

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 1.67.0-nightly (32e613bba 2022-12-02) running on x86_64-apple-darwin

query stack during panic:
end of query stack
error: aborting due to 2 previous errors

Regression

Regression in nightly-2021-04-12

Commits in range

found 9 bors merge commits in the specified range
  commit[0] 2021-04-10UTC: Auto merge of #84016 - Aaron1011:new-preexp-tests, r=petrochenkov
  commit[1] 2021-04-10UTC: Auto merge of #84023 - Aaron1011:derive-invoc-order, r=petrochenkov
  commit[2] 2021-04-11UTC: Auto merge of #84053 - RalfJung:liballoc-miri, r=Manishearth
  commit[3] 2021-04-11UTC: Auto merge of #84071 - nagisa:nixos-patching-fix, r=Mark-Simulacrum
  commit[4] 2021-04-11UTC: Auto merge of #83806 - JohnTitor:issue-51446, r=estebank
  commit[5] 2021-04-11UTC: Auto merge of #82608 - Aaron1011:feature/final-preexp-tts, r=petrochenkov
  commit[6] 2021-04-11UTC: Auto merge of #84063 - LingMan:patch-1, r=nagisa
  commit[7] 2021-04-11UTC: Auto merge of #81469 - tweksteen:android_set_message, r=m-ou-se
  commit[8] 2021-04-11UTC: Auto merge of #83482 - hyd-dev:uwtable, r=nagisa

Version

rustc 1.67.0-nightly (32e613bba 2022-12-02)
binary: rustc
commit-hash: 32e613bbaafee1bcabba48a2257b838f8d1c03d3
commit-date: 2022-12-02
host: x86_64-apple-darwin
release: 1.67.0-nightly
LLVM version: 15.0.4

CC @petrochenkov, @Aaron1011, #82679