unused variable in if else block: scoping issue?

[stucash]

It is not necessarily an issue but I wanted to raise it to you first before I ask it on SO as it might well be a plugin specific question.

if I have:

if (x == 1){
    a = 1
}else{
    a = 2
} 

the "a" in else block was marked as unused variable.

I understand R doesn't enforce scope on curly brackets, this means the a is available even outside the if statement. So why is the "a" in else statement an unused variable?

Note that I will have used "a" after this if else block.

[holgerbrandl]

No need to ask on SO, it's clearly a plugin issue. You're totally right about R scoping rules. The usage tracer in the plugin is simply not yet clever enough to "escape" the curly bracket else scope.

Though, I wonder why it does not fail in the same manner for the if scope...