intrinsics.type_core_type does not return the underyling type of a bit set

[slayyden]

Context

Odin: dev-2026-08:8412dc37a
OS: macOS Tahoe 26.6.2 (build 25G83, kernel 25.6.0)
CPU: Apple M4 Pro
RAM: 24576 MiB
Backend: LLVM 22.1.8

Expected Behavior

Consider the following program:

package main
import "base:intrinsics"
import "core:fmt"

BitSet :: bit_set[0..<1; u32]

main :: proc() {
	fmt.println(typeid_of(BitSet))
	fmt.println(typeid_of(intrinsics.type_core_type(BitSet)))
}

This should print

bit_set[0..=0; u32]
u32

Current Behavior

It prints

bit_set[0..=0; u32]
bit_set[0..=0; u32]

[blob1807]

There's base:intrinsics.type_bit_set_underlying_type() for that.

[slayyden]

This still contradicts the documentation for type_core_type.

Returns the type without any distinct indirection and the underlying integer type for an enum or bit_set e.g. Foo :: distinct int, type_core_type(Foo) == int, or Bar :: enum u8 {A}, type_core_type(Bar) == u8, or Baz :: bit_set[Bar; u32], type_core_type(Baz) == u32