coercing enum to union emits broken LLVM module

[EgorkaZ]

Zig Version

0.14.1

Steps to Reproduce and Observed Output

run zig init, replace src/main.zig contents with this and run zig build

const std = @import("std");

pub fn main() !void {
    std.debug.print("wont compile {}\n", .{Enum.parse("kekeke")});
}

const Enum = enum {
    a,
    b,

    fn parse(method_str: []const u8) TricksterUnion {
        return std.meta.stringToEnum(Enum, method_str).?;
    }
};

const TricksterUnion = union(Enum) { a, b };

the only error (without any stack trace or anything)

error: Intrinsic has incorrect argument type!
ptr @llvm.memcpy.p0.i1.i64
LLVM ERROR: Broken module found, compilation aborted!

Expected Output

Compiled executable

[mlugg]

Reproduces on master with the LLVM backend. Works as expected when using the self-hosted x86_64 backend.

(This is valid code: you can coerce a runtime-known enum value to a union backed by that enum if all of the fields are void.)

[EgorkaZ]

Oh, okay. Changed issue description then