Thread.spawn does not accept !void functions

[leroycep]

const std = @import("std");

fn run(_arg: u8) !void {
    const x = try std.testing.allocator.create(u8);
    defer std.testing.allocator.destroy(x);
}

pub fn main() !void {
    const thread_handle = try std.Thread.spawn(@as(u8, 0), run);
    thread_handle.wait();
}

When compiled, results in the following error:

$ zig build-exe thread_test.zig
Semantic Analysis [492/778] /home/leroycep/sources/github.com/ziglang/zig/build/lib/zig/std/thread.zig:212:29: error: expected return type of startFn to be 'u8', 'noreturn', 'void', or '!void'
                    else => @compileError("expected return type of startFn to be 'u8', 'noreturn', 'void', or '!void'"),
                            ^