DMD can implicitly convert class pointer to the bool. Is it bug or terrible feature?

[ilya-stromberg]

On Sunday, 24 November 2013 at 14:16:39 UTC, bearophile wrote:
> Maxim Fomin:
>
>> This is neither bug not a terribale feature.
>
> I think the implicit question of ilya-stromberg was: how much 
> bug-prone is this language feature?

Yes, exactly. I personally was VERY surprised. My code example 
from real life:

class Foo
{
}

class Bar
{
	Foo f;
	
	void bar()
	{
		//variable was wrongly commented here
		//bool f = true;
		
		if(f)
		{
			//Oops!
		}
	}
}