msg.data, calldataload, calldatasize not available in constructor but no error in compiler

[3esmit]

Description

constructor() is a different type of method, which dont have calldata.

When using msg.data on constructor, or equivalents in Yul, the result would be null. Although, no errors are presented by compiler.

contract A  {

    event Log(bytes data, uint size);
    bytes public b;
    uint public size;
    constructor (uint256 value) 
    {
        uint s;
        assembly {
            s := calldatasize()
        }
        emit Log(msg.data, s);
        b = msg.data;
        size = s;
    }
}

Logs:

[
	{
		"from": "0x8207D032322052AfB9Bf1463aF87fd0c0097EDDE",
		"topic": "0x2c3af94f3304a9c884c0e74503327fb15ee45c874e155fd13b4d1f9ba9fb8857",
		"event": "Log",
		"args": {
			"0": "0x",
			"1": "0",
			"data": "0x",
			"size": "0"
		}
	}
]