Logged In: YES 
user_id=849994

I'm afraid that this cannot be fixed.

In normal execution, the variable "parm1" is stored by the
compiler in the "fast locals" (that are referenced by index
into a list) for the function that is used to build the
class, which means that it is not in the dict of "normal
locals" (that are referenced by their name in the dict) that
is returned at the end.

If you set a trace function, on each call to the trace
function the "fast locals" are merged into the "normal
locals" in order to give the trace function full control
over the execution frame. This means that after the trace
function has been executed for the class' frame, the locals
will contain "parm1" which will then show up as an attribute
of that class.

Martin, do you you have an additional opinion?