const std = @import("std");

pub fn main() void {
    var u = &User{ .id = 2 };
    u.id = 54;
}

const User = struct { id: i32 };

The above code gives me the following error, the variable is declared using the var modifier yet it says cannot assign to constant.

main.zig:5:6: error: cannot assign to constant
    u.id = 54;
    ~^~~
referenced by:
    callMain: /opt/homebrew/Cellar/zig/0.12.0/lib/zig/std/start.zig:501:17
    callMainWithArgs: /opt/homebrew/Cellar/zig/0.12.0/lib/zig/std/start.zig:469:12
    remaining reference traces hidden; use '-freference-trace' to see all reference traces