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ICE from using super let and &raw in const #142229

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@theemathas

Description

@theemathas

Code

#![feature(super_let)]

const _: *const i32 = {
    super let x = 1;
    &raw const x
};

Meta

Reproducible on the playground with 1.89.0-nightly (2025-06-08 6ccd4476036edfce364e)

Error output

error: internal compiler error: compiler/rustc_const_eval/src/interpret/intern.rs:285:21: the static const safety checks accepted mutable references they should not have accepted
 --> src/lib.rs:3:1
  |
3 | const _: *const i32 = {
  | ^^^^^^^^^^^^^^^^^^^
Backtrace

thread 'rustc' panicked at compiler/rustc_const_eval/src/interpret/intern.rs:285:21:
Box<dyn Any>
stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: <rustc_errors::diagnostic::BugAbort as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   2: <rustc_errors::DiagCtxtHandle>::span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
   3: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
   4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
   5: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
   6: rustc_middle::util::bug::span_bug_fmt::<rustc_span::span_encoding::Span>
   7: rustc_const_eval::interpret::intern::intern_const_alloc_recursive::<rustc_const_eval::const_eval::machine::CompileTimeMachine>
   8: rustc_const_eval::const_eval::eval_queries::eval_to_allocation_raw_provider
      [... omitted 1 frame ...]
   9: rustc_const_eval::const_eval::eval_queries::eval_to_const_value_raw_provider
      [... omitted 1 frame ...]
  10: rustc_hir_analysis::check_crate
  11: rustc_interface::passes::analysis
      [... omitted 1 frame ...]
  12: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  13: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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: please make sure that you have updated to the latest nightly

note: please attach the file at `/playground/rustc-ice-2025-06-09T05_51_22-61.txt` to your bug report

note: compiler flags: --crate-type lib -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2

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

query stack during panic:
#0 [eval_to_allocation_raw] const-evaluating + checking `_`
#1 [eval_to_const_value_raw] simplifying constant for the type system `_`
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `playground` (lib)

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    C-bugCategory: This is a bug.F-super_letit's super, let's go!I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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