Issues with recognizing directory renaming

[immersinn]

Description

What steps will reproduce the problem?

1.Probably a weird corner case that involves me doing things that are very contrary to best practices. Renaming directories on the fly and then trying to move forward / backward in the File Explorer history caused the error. Also noticed issues with properly refreshing directory contents, etc.

What is the expected output? What do you see instead?

Please provide any additional information below

File "/home/immersinn/.virtualenvs/networks/lib/python3.5/site-packages/spyder/widgets/explorer.py", line 1132, in chdir
os.chdir(directory)
FileNotFoundError: [Errno 2] No such file or directory: '/home/immersinn/gits/networks/learning-path'

Traceback (most recent call last):
File "/home/immersinn/.virtualenvs/networks/lib/python3.5/site-packages/spyder/widgets/explorer.py", line 1097, in go_to_previous_directory
self.chdir(browsing_history=True)
File "/home/immersinn/.virtualenvs/networks/lib/python3.5/site-packages/spyder/widgets/explorer.py", line 1135, in chdir
except PermissionError:
UnboundLocalError: local variable 'PermissionError' referenced before assignment

Version and main components

• Spyder Version: 3.2.2
• Python Version: 3.5.2
• Qt Versions: 5.9.1, PyQt5 5.9 on Linux

Dependencies

pyflakes >=0.6.0 :  1.6.0 (OK)
pycodestyle >=2.3:  2.3.1 (OK)
pygments >=2.0   :  2.2.0 (OK)
pandas >=0.13.1  :  None (NOK)
numpy >=1.7      :  1.13.1 (OK)
sphinx >=0.6.6   :  1.6.3 (OK)
rope >=0.9.4     :  0.10.7 (OK)
jedi >=0.9.0     :  0.10.2 (OK)
psutil >=0.3     :  5.3.0 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
sympy >=0.7.3    :  None (NOK)
cython >=0.21    :  0.26.1 (OK)
qtconsole >=4.2.0:  4.3.1 (OK)
IPython >=4.0    :  6.1.0 (OK)
pylint >=0.25    :  1.7.2 (OK)

[ccordoba12]

Thanks for reporting. We'll take a look at this after we release 3.2.3

[ccordoba12]

@dalthviz, please work on this one.