"my" variable $x masks earlier declaration in same scope at test.pl line 9 (#1) (W misc) A "my" or "our" variable has been redeclared in the current scope or statement, effectively eliminating all access to the previous instance.  This is almost always a typographical error.  Note that the earlier variable will still exist until the end of the scope or until all closure referents to it are destroyed.

Found = in conditional, should be == at test.pl line 9 (#2)
    (W syntax) You said

        if ($foo = 123)

    when you meant

        if ($foo == 123)

    (or something like that).