One Day Working for a Bug

This morning a bug was reported to me. I tried to find what cause it, and till this afternoon I found it.

The bug was caused by a static varient in a member function. It stay on FALSE from the last call. But I want it to be TRUE the latest calling.

The varient was declared like this:

static BOOL bNoClear = TRUE;

It looks like that it will be TRUE after running across this line if you are careless.  So I was confused by this.