Allocator.realloc can't handle 0-size types

[thejoshwolfe]

const std = @import("std");
test "asdf" {
    var list1 = std.ArrayList(u1).init(std.testing.allocator);
    defer list1.deinit();
    try list1.append(0); // works fine

    var list0 = std.ArrayList(u0).init(std.testing.allocator);
    defer list0.deinit();
    try list0.append(0); // compile error
}

./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/mem.zig:165:37: error: alignment must be >= 1
        break :t Error![]align(Slice.alignment) Slice.child;
                                    ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/mem.zig:163:69: note: called from here
    pub fn realloc(self: *Allocator, old_mem: var, new_n: usize) t: {
                                                                    ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/array_list.zig:200:71: note: called from here
        pub fn ensureCapacity(self: *Self, new_capacity: usize) !void {
                                                                      ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/mem.zig:165:24: note: referenced here
        break :t Error![]align(Slice.alignment) Slice.child;
                       ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/mem.zig:163:69: note: referenced here
    pub fn realloc(self: *Allocator, old_mem: var, new_n: usize) t: {
                                                                    ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/array_list.zig:209:58: note: referenced here
            const new_memory = try self.allocator.realloc(self.allocatedSlice(), better_capacity);
                                                         ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/array_list.zig:225:13: note: referenced here
            try self.ensureCapacity(newlen);
            ^
./zig-linux-x86_64-0.5.0+dbc00e242/lib/zig/std/array_list.zig:110:34: note: referenced here
            const new_item_ptr = try self.addOne();
                                 ^
./test.zig:9:5: note: referenced here
    try list0.append(0);
    ^

[sibkit]

for what?