Assignment to arary member in packed struct will not happen

[iacore]

Zig Version

0.10.0-dev.1919+5da0e0355

Steps to Reproduce

Array assignment sometimes doesn't happen.

const std = @import("std");

const Memory = packed struct {
    mouse: u48, // try changing this to u32
    framebuffer: [4]u8,
};

var m: Memory = undefined;
pub fn main() void {
    m.framebuffer[0] = 13;
    std.debug.print("{}", .{m});
}

Expected Behavior

Memory{ .mouse = 13, .framebuffer = { 13, 0, 0, 0 } }

Actual Behavior

Memory{ .mouse = 13, .framebuffer = { 0, 0, 0, 0 } }

[iacore]

Related: #10185

[Vexu]

Arrays are no longer allowed in packed structs.