`@memcpy` aliasing isnt checked at comptime

[xdBronch]

Zig Version

0.14.0-dev.1887+008acd054

Steps to Reproduce and Observed Behavior

pub fn main() !void {
    comptime {
        var buffer = [2]u8{ 1, 2 } ** 5;
        var len: usize = 5;
        _ = &len;
        @memcpy(buffer[0..len], buffer[4 .. 4 + len]);
    }
}

just taking the test case for memcpy aliasing but wrap it in a comptime block gives no compile error

Expected Behavior

compile error, safety checks should be an error at comptime

[xdBronch]

fixed by #22631