Missing AA0139 when assigning a compound text

[NKarolak]

1. Describe the bug
Rule AA0139 Possible overflow assigning 'Text' to 'Code[10]' does not fire when assigning a compound text to code.

2. To Reproduce

procedure MyTest()
var
    Code10: Code[10];
    Text: Text;
begin
    Code10 := Text; // fires AA0139
    Code10 := Code10 + Text; // no AA0139
end;

3. Expected behavior
Rule AA0139 should fire on
Code10 := Code10 + Text;

4. Actual behavior
Rule AA0139 is not triggered.

5. Versions:

• AL Language: v14.2.1249978