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Remove FromCycleError impl for SymbolName.

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It has no effect.

`symbol_name` is the only query that produces a `SymbolName`. If it was
marked with `cycle_delayed_bug`/`cycle_stash` then this `FromCycleError`
impl would make sense, but that's not the case. Maybe it was the case in
the past.
This commit is contained in:
Nicholas Nethercote
2026-02-27 16:15:59 +11:00
parent 5677f7c706
commit 5bd28b85bd
1 changed files with 0 additions and 12 deletions
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compiler/rustc_query_impl/src/from_cycle_error.rs
-12
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@@ -56,18 +56,6 @@ fn from_cycle_error(_tcx: TyCtxt<'tcx>, _: CycleError, guar: ErrorGuaranteed) ->
}
}
impl<'tcx> FromCycleError<'tcx> for ty::SymbolName<'_> {
fn from_cycle_error(tcx: TyCtxt<'tcx>, _: CycleError, _guar: ErrorGuaranteed) -> Self {
// SAFETY: This is never called when `Self` is not `SymbolName<'tcx>`.
// FIXME: Represent the above fact in the trait system somehow.
unsafe {
std::mem::transmute::<ty::SymbolName<'tcx>, ty::SymbolName<'_>>(ty::SymbolName::new(
tcx, "<error>",
))
}
}
}
impl<'tcx> FromCycleError<'tcx> for ty::Binder<'_, ty::FnSig<'_>> {
fn from_cycle_error(tcx: TyCtxt<'tcx>, cycle_error: CycleError, guar: ErrorGuaranteed) -> Self {
let err = Ty::new_error(tcx, guar);