Compiler crash when generated struct includes field of generated type from fn containing undeclared identifier

[tgschultz]

const std = @import("std");
const math = std.math;

pub fn Gen(comptime val: u32) type
{
    const UType = @IntType(false, math.ceil(val));

    const S = struct
    {
        code_len: UType,
    };
    return S;
}

test "Crash"
{
    const G = Gen(8);
}

I haven't been able to minimize the circumstances further than the above. As you can see, math.ceil is passed an incorrect type and should produce an error message communicating that. For some reason, this specific construction instead causes a compiler crash.

[tgschultz]

A more minimal example:

fn Undeclared() type
{
    return T;
}

fn Gen() type
{
    const X = Undeclared();
    return struct
    {
        x: X,
    };
}

test "undeclared identifier"
{
    const S = Gen();
}