ICE: "non-Scalar ConstValue encountered in super_relate_consts" with const generics

[Aaron1011]

The following code:

#![feature(const_generics)]
struct NoMatch;

fn foo<const T: NoMatch>() -> bool {
    return true
}

fn main() {
    foo::<{NoMatch}>();
}

Produces an ICE:

error: internal compiler error: src/librustc/ty/relate.rs:598: non-Scalar ConstValue encountered in super_relate_consts Const { ty: NoMatch, val: ByRef { align: Align { pow2: 0 }, offset: Size { raw: 0 }, alloc: Allocation { bytes: [], relocations: Relocations(SortedMap { data: [] }), undef_mask: UndefMask { blocks: [], len: Size { raw: 0 } }, align: Align { pow2: 0 }, mutability: Immutable, extra: () } } } Const { ty: NoMatch, val: ByRef { align: Align { pow2: 0 }, offset: Size { raw: 0 }, alloc: Allocation { bytes: [], relocations: Relocations(SortedMap { data: [] }), undef_mask: UndefMask { blocks: [], len: Size { raw: 0 } }, align: Align { pow2: 0 }, mutability: Immutable, extra: () } } }