AL0157 with ControlAddIn type variable BC21

[oscarfernandezkurago]

1. Describe the bug
From version 21.0.40246.0 we´re getting an AL0157 error when declaring a variable of type ControlAddIn, that code has compiled well for the last two years until now.

2. To Reproduce
Create a variable of type ControlAddIn inside a codeunit.

3. Expected behavior
Compile without errors.

4. Actual behavior
AL0157 compiler error.

5. Versions:

• AL Language: v10.0.608152
• Visual Studio Code: 1.67.2
• Business Central: Platform 21.0.40964.0 + Application 21.0.41052.0

[EmilDamsbo]

@oscarfernandezkurago Would you be able to explain why this is a problem? We previously allowed this, yes, but unfortunately declaring a variable of type ControlAddIn would lead to issues. Specifically, when the codeunit was being run the runtime would instantly throw an error. If you are able to please provide a sample codeunit which does not break upon usage, we would be able to further investigate,

[oscarfernandezkurago]

Thanks for answering so fast. Is this restriction new in BC21? I guess so because in BC20 was working, If I understand it right, in BC21 has never worked in runtime but the compiler was allowing it until version 21.0.40246.0.

[EmilDamsbo]

The compiler restriction is new in BC21, but the runtime issue has been around before the compiler disallowed this (which is the reason we decided to disallow it).

[oscarfernandezkurago]

Thank you.

[EmilDamsbo]

Due to more and more reports like this one and #7055 we are reversing to not providing a compiler error for this.