[BUG] bad warning about variable not used in IF ELSE statement

[gohierf]

Describe the bug A variable is considered not used if defined with VAR statement in both IF and ELSE clause.

To Reproduce Steps to reproduce the behavior:

1. Paste example code
2. Wait for diagnostic to finish
3. Observe warning about variable not used in IF block.

If possible, add some example source code like:

*** Keywords ***
My Keyword
    [Documentation]    Unused variable error and collapsing error
    [Arguments]    ${arg}
    IF    $arg == 1
        VAR    ${my var}    foo
    ELSE
        VAR    ${my var}    bar
    END
    RETURN    ${my var}

Expected behavior No warning.

Screenshots/ Videos

Logs NA

Desktop (please complete the following information):

• VS Code Version 1.92.0
• RobotCode Version 0.84.0
• OS: Windows
• Python Version 3.11
• RobotFramework Version 7.0
• robocop 5.0.4
• robotidy 4.11.0

Additional context I get a warning if the same variable is defined in an ELSE IF bloc.

I get the same warning if the variable is used in a keyword rather than RETURN statement.

[gohierf]

On a similar topic, I get "variable not used" for counter in this case:

*** Test Cases ***
My Test
    VAR    ${counter}    ${0}
    WHILE    True    limit=2s
        Log To Console    ${counter}
        VAR    ${counter}    ${counter+1}
    END