gistfile1.py

from pdb import set_trace


def wrap1(name):
    print('wrap 1: {}'.format(str(locals())))
    def inner():  ## no reference to name in inner function
        set_trace()
    inner()

def wrap2(name):
    print('wrap 2: {}'.format(str(locals())))
    def inner():  ## reference to name before set_trace()
        name
        set_trace()
    inner()

def wrap3(name):
    print('wrap 3: {}'.format(str(locals())))
    def inner():  ## reference to name after set_trace(), same as wrap2()
        set_trace()
        name
    inner()

wrap1('this is broken')
wrap2('this works')
wrap3('this works too')


""" OUTPUT:
fk-mbp:workspace fabian$ python pdb_bug.py 
wrap 1: {'name': 'this is broken'}
--Return--
> /Users/fabian/workspace/pdb_bug.py(7)inner()->None
-> set_trace()
(Pdb) name
*** NameError: name 'name' is not defined

(Pdb) c
wrap 2: {'name': 'this works'}
--Return--
> /Users/fabian/workspace/pdb_bug.py(14)inner()->None
-> set_trace()
(Pdb) name
'this works'

(Pdb) c
wrap 3: {'name': 'this works too'}
> /Users/fabian/workspace/pdb_bug.py(21)inner()
-> name
(Pdb) name
'this works too'

(Pdb) c
fk-mbp:workspace fabian$

"""