Reversing the order of two in-contract functions causes two different error messages

[haoyang9804]

Description

The following test program causes a Member "func27" not found or not visible after argument-dependent lookup in contract contract19.

contract contract19 {
  mapping(int64 => mapping(int64 => int64)) internal mapping37;
  function func26() external view {
    this.func27(mapping37);
  }
  function func27(mapping(int64 => mapping(int64 => int64)) memory mapping28) external view {

  }
}

The following test program switches the order of func26 and func27, and it triggers Types containing (nested) mappings can only be parameters or return variables of internal or library functions.

contract contract19 {
  mapping(int64 => mapping(int64 => int64)) internal mapping37;
  function func27(mapping(int64 => mapping(int64 => int64)) memory mapping28) external view {

  }
  function func26() external view {
    this.func27(mapping37);
  }
}

I think the second error message is correct.

Environment

• Compiler version: 0.8.28