`Range` is not a lang item

[bjorn3]

rust/src/libcore/ops/range.rs

Lines 79 to 89 in c0955a3

	#[doc(alias = "..")]
	#[derive(Clone, PartialEq, Eq, Hash)] // not Copy -- see #27186
	#[stable(feature = "rust1", since = "1.0.0")]
	pub struct Range<Idx> {
	/// The lower bound of the range (inclusive).
	#[stable(feature = "rust1", since = "1.0.0")]
	pub start: Idx,
	/// The upper bound of the range (exclusive).
	#[stable(feature = "rust1", since = "1.0.0")]
	pub end: Idx,
	}

Rustc always lowers it to ::ops::Range.

rust/src/librustc/hir/lowering.rs

Lines 3781 to 3809 in caed80b

	ExprKind::Range(ref e1, ref e2, lims) => {
	use syntax::ast::RangeLimits::*;
	let path = match (e1, e2, lims) {
	(&None, &None, HalfOpen) => "RangeFull",
	(&Some(..), &None, HalfOpen) => "RangeFrom",
	(&None, &Some(..), HalfOpen) => "RangeTo",
	(&Some(..), &Some(..), HalfOpen) => "Range",
	(&None, &Some(..), Closed) => "RangeToInclusive",
	(&Some(..), &Some(..), Closed) => unreachable!(),
	(_, &None, Closed) => self.diagnostic()
	.span_fatal(e.span, "inclusive range with no end")
	.raise(),
	};
	let fields = e1.iter()
	.map(|e| ("start", e))
	.chain(e2.iter().map(|e| ("end", e)))
	.map(|(s, e)| {
	let expr = P(self.lower_expr(&e));
	let ident = Ident::new(Symbol::intern(s), e.span);
	self.field(ident, expr, e.span)
	})
	.collect::<P<[hir::Field]>>();
	let is_unit = fields.is_empty();
	let struct_path = iter::once("ops")
	.chain(iter::once(path))
	.collect::<Vec<_>>();

Found some more lowerings like this

rust/src/librustc/hir/lowering.rs

Line 4207 in caed80b

let path = &["ops", "Try", "into_result"];

rust/src/librustc/hir/lowering.rs

Line 4809 in caed80b

let path = &["ops", "Try", method];

rust/src/librustc/hir/lowering.rs

Line 3774 in caed80b

let ty_path = P(self.std_path(e.span, &["ops", "RangeInclusive"], None, false));

They should probably be a lang item.

[durka]

Related to #20541.

[Mark-Simulacrum]

This is still the case today, though is a bit harder to grep for as rustc uses symbols now for the elements, e.g.,

rust/src/librustc_ast_lowering/expr.rs

Line 850 in 3014f23

&[sym::ops, sym::RangeInclusive],

[davidtwco]

Closing, fixed by #75145.