Repository: spyder-ide/spyder

Issue:
IndexError in Code Analysis prevents Spyder from getting launched
<!--- **PLEASE READ:** When submitting here, please ensure you've completed the following checklist and checked the boxes to confirm. Issue reports without it may be closed. Thanks! --->

### Issue Report Checklist

* [ ] Searched the [issues page](https://github.com/spyder-ide/spyder/issues?q=is%3Aissue) for similar reports
* [ ] Read the relevant sections of the [Spyder Troubleshooting Guide](https://github.com/spyder-ide/spyder/wiki/Troubleshooting-Guide-and-FAQ) and followed its advice
* [ ] Reproduced the issue after updating with ``conda update spyder`` (or ``pip``, if not using Anaconda)
* [ ] Could not reproduce inside ``jupyter qtconsole`` (if console-related)
* [ ] Tried basic troubleshooting (if a bug/error)
    * [ ] Restarted Spyder
    * [ ] Reset preferences with ``spyder --reset``
    * [ ] Reinstalled the latest version of [Anaconda](https://www.anaconda.com/download/)
    * [ ] Tried the other applicable steps from the Troubleshooting Guide
* [ ] Completed the **Problem Description**, **Steps to Reproduce** and **Version** sections below


## Problem Description
On launching Spyder, I get error as mentioned below:



### What steps reproduce the problem?

1. launch Spyder
2. 
3. 

### What is the expected output? What do you see instead?
Spyder IDE not getting launched


### Paste Traceback/Error Below (if applicable)
<!--- Copy from error dialog or View > Panes > Internal Console --->

```python-traceback

Traceback (most recent call last):
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\Scripts\spyder-script.py", line 10, in 
sys.exit(main())
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\app\start.py", line 205, in main
mainwindow.main()
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\app\mainwindow.py", line 3763, in main
mainwindow = run_spyder(app, options, args)
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\app\mainwindow.py", line 3638, in run_spyder
main.setup()
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\app\mainwindow.py", line 984, in setup
plugin = module.PLUGIN_CLASS(self)
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\plugins\pylint\plugin.py", line 56, in __init__
self.pylint = PylintWidget(self, max_entries=max_entries,
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\plugins\pylint\widgets\pylintgui.py", line 252, in __init__
self.set_filename(f)
File "C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\plugins\pylint\widgets\pylintgui.py", line 279, in set_filename
self.curr_filenames.pop(index)
IndexError: pop index out of range
```


## Versions
<!--- You can get this information from Help > About Spyder...
or (if Spyder won't launch) the "conda list" command
from the Anaconda Prompt/Terminal/command line. --->

* Spyder version: 
* Python version: 
* Qt version: 
* PyQt version: 
* Operating System name/version: 
As I am unable to launch Spyder, please let me know how to get these details.

### Dependencies
<!--- Please go to the menu entry Help > Dependencies,
press the Copy to clipboard button and paste below --->

```
As I am unable to launch Spyder, please let me know how to get these details.
```
```NOTE: Today I upgraded Spyder and few other modules. Since then there is this issue.```


Discussion:
Hi @dasdebashish17, thanks for the report.

Could you provide the missing information?

```
Spyder version:
Python version:
Qt version:
PyQt version:
Operating System name/version:
```

you can open the Anaconda Prompt and type

```
conda info
conda list
```

And paste the output here as text. 

Cheers!
Log from conda info is mentioned below:
```
     active environment : base
    active env location : C:\Users\uidn7351\AppData\Local\Continuum\anaconda3
            shell level : 1
       user config file : C:\Users\uidn7351\.condarc
 populated config files : C:\Users\uidn7351\.condarc
          conda version : 4.8.3
    conda-build version : 3.18.11
         python version : 3.8.3.final.0
       virtual packages :
       base environment : C:\Users\uidn7351\AppData\Local\Continuum\anaconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\pkgs
                          C:\Users\uidn7351\.conda\pkgs
                          C:\Users\uidn7351\AppData\Local\conda\conda\pkgs
       envs directories : C:\Users\uidn7351\AppData\Local\Continuum\anaconda3\envs
                          C:\Users\uidn7351\.conda\envs
                          C:\Users\uidn7351\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.8.3 requests/2.24.0 CPython/3.8.3 Windows/10 Windows/10.0.17763
          administrator : False
             netrc file : None
           offline mode : False
```

Log from conda list is mentioned below:

<details>
```
# packages in environment at C:\Users\uidn7351\AppData\Local\Continuum\anaconda3:
#
# Name                    Version                   Build  Channel
2to3                      1.0                      pypi_0    pypi
_anaconda_depends         2020.02                  py38_0
_ipyw_jlab_nb_ext_conf    0.1.0                    py38_0
aenum                     2.2.3                    pypi_0    pypi
alabaster                 0.7.12                     py_0
altair                    3.2.0                    pypi_0    pypi
anaconda                  custom                   py38_1
anaconda-client           1.7.2                    py38_0
anaconda-navigator        1.9.12                   py38_0
anaconda-project          0.8.4                      py_0
argh                      0.26.2                   py38_0
asn1crypto                1.3.0                    py38_0
astroid                   2.3.3                    py38_0
astropy                   4.0.1.post1      py38he774522_1
atomicwrites              1.4.0                      py_0
attrs                     19.3.0                     py_0
autopep8                  1.5.3                      py_0
babel                     2.8.0                      py_0
backcall                  0.2.0                      py_0
backports                 1.0                        py_2
backports.functools_lru_cache 1.6.1                      py_0
backports.shutil_get_terminal_size 1.0.0                    py38_2
backports.tempfile        1.0                        py_1
backports.weakref         1.0.post1                  py_1
bcrypt                    3.1.7            py38he774522_1
beautifulsoup4            4.9.1                    py38_0
bincopy                   16.0.0                   pypi_0    pypi
bitarray                  1.4.0            py38he774522_0
bitstruct                 8.10.0                   pypi_0    pypi
bkcharts                  0.2                      py38_0
blas                      1.0                         mkl
bleach                    3.1.5                      py_0
blosc                     1.19.0               h7bd577a_0
bokeh                     2.1.1                    py38_0
boto                      2.49.0                   py38_0
bottleneck                1.3.2            py38h2a96729_1
brotlipy                  0.7.0           py38he774522_1000
bzip2                     1.0.8                he774522_0
ca-certificates           2020.6.24                     0
cachetools                3.1.1                    pypi_0    pypi
cantools                  34.0.0                   pypi_0    pypi
certifi                   2020.6.20                py38_0
cffi                      1.14.0           py38h7a1dbc1_0
chardet                   3.0.4                 py38_1003
click                     7.1.2                      py_0
cloudpickle               1.5.0                      py_0
clyent                    1.2.2                    py38_1
cobs                      1.1.3                    pypi_0    pypi
colorama                  0.4.3                      py_0
comtypes                  1.1.7                 py38_1001
conda                     4.8.3                    py38_0
conda-build               3.18.11                  py38_1
conda-env                 2.6.0                         1
conda-package-handling    1.6.1            py38h62dcd97_0
conda-verify              3.4.2                      py_1
console_shortcut          0.1.1                         3
contextlib2               0.6.0.post1                py_0
cryptography              2.9.2            py38h7a1dbc1_0
curl                      7.71.1               h2a8f88b_1
cycler                    0.10.0                   py38_0
cython                    0.29.21          py38ha925a31_0
cytoolz                   0.10.1           py38he774522_0
dask                      2.20.0                     py_0
dask-core                 2.20.0                     py_0
decorator                 4.4.2                      py_0
defusedxml                0.6.0                      py_0
diff-match-patch          20200713                   py_0
diskcache                 4.1.0                    pypi_0    pypi
distributed               2.20.0                   py38_0
docutils                  0.16                     py38_1
entrypoints               0.3                      py38_0
et_xmlfile                1.0.1                   py_1001
fastcache                 1.1.0            py38he774522_0
filelock                  3.0.12                     py_0
flake8                    3.8.3                      py_0
flask                     1.1.2                      py_0
freetype                  2.10.2               hd328e21_0
fsspec                    0.7.4                      py_0
future                    0.18.2                   py38_1
get_terminal_size         1.0.0                h38e98db_0
gevent                    20.6.2           py38he774522_0
glob2                     0.7                        py_0
gmpy2                     2.0.8            py38h7edee0f_3
google                    2.0.3                    pypi_0    pypi
google-api-python-client  1.7.11                   pypi_0    pypi
google-auth               1.8.2                    pypi_0    pypi
google-auth-httplib2      0.0.3                    pypi_0    pypi
greenlet                  0.4.16           py38he774522_0
h5py                      2.10.0           py38h5e291fa_0
hdf5                      1.10.4               h7ebc959_0
heapdict                  1.0.1                      py_0
html5lib                  1.1                        py_0
httplib2                  0.14.0                   pypi_0    pypi
humanfriendly             4.18                     pypi_0    pypi
hypothesis                5.18.3                     py_0
icc_rt                    2019.0.0             h0cc432a_1
icu                       58.2                 ha925a31_3
idna                      2.10                       py_0
imageio                   2.9.0                      py_0
imagesize                 1.2.0                      py_0
importlib-metadata        1.7.0                    py38_0
importlib_metadata        1.7.0                         0
intel-openmp              2020.1                      216
intervaltree              3.0.2                      py_1
ipykernel                 5.3.2            py38h5ca1d4c_0
ipython                   7.16.1           py38h5ca1d4c_0
ipython_genutils          0.2.0                    py38_0
ipywidgets                7.5.1                      py_0
iso8601                   0.1.12                   pypi_0    pypi
isort                     4.3.21                   py38_0
itsdangerous              1.1.0                      py_0
jdcal                     1.4.1                      py_0
jedi                      0.17.1                   py38_0
jinja2                    2.11.2                     py_0
joblib                    0.16.0                     py_0
jpeg                      9b                   hb83a4c4_2
json5                     0.9.5                      py_0
jsonschema                3.2.0                    py38_0
jupyter                   1.0.0                    py38_7
jupyter_client            6.1.6                      py_0
jupyter_console           6.1.0                      py_0
jupyter_core              4.6.3                    py38_0
jupyterlab                2.1.5                      py_0
jupyterlab_server         1.2.0                      py_0
keyring                   21.2.1                   py38_0
kiwisolver                1.2.0            py38h74a9793_0
krb5                      1.18.2               hc04afaa_0
lazy-object-proxy         1.5.0            py38he774522_0
libarchive                3.4.2                h5e25573_0
libcurl                   7.71.1               h2a8f88b_1
libiconv                  1.15                 h1df5818_7
liblief                   0.10.1               ha925a31_0
libllvm9                  9.0.1                h21ff451_0
libpng                    1.6.37               h2a8f88b_0
libsodium                 1.0.18               h62dcd97_0
libspatialindex           1.9.3                h33f27b4_0
libssh2                   1.9.0                h7a1dbc1_1
libtiff                   4.1.0                h56a325e_1
libxml2                   2.9.10               h464c3ec_1
libxslt                   1.1.34               he774522_0
llvmlite                  0.33.0           py38ha925a31_0
locket                    0.2.0                    py38_1
lxml                      4.5.2            py38h1350720_0
lz4-c                     1.9.2                h62dcd97_0
lzo                       2.10                 he774522_2
m2w64-gcc-libgfortran     5.3.0                         6
m2w64-gcc-libs            5.3.0                         7
m2w64-gcc-libs-core       5.3.0                         7
m2w64-gmp                 6.1.0                         2
m2w64-libwinpthread-git   5.0.0.4634.697f757               2
markdown                  3.2.2                    pypi_0    pypi
markupsafe                1.1.1            py38he774522_0
matplotlib                3.2.2                         0
matplotlib-base           3.2.2            py38h64f37c6_0
mccabe                    0.6.1                    py38_1
menuinst                  1.4.16           py38he774522_1
mistune                   0.8.4           py38he774522_1000
mkl                       2020.1                      216
mkl-service               2.3.0            py38hb782905_0
mkl_fft                   1.1.0            py38h45dec08_0
mkl_random                1.1.1            py38h47e9c7a_0
mock                      4.0.2                      py_0
more-itertools            8.4.0                      py_0
mpc                       1.1.0                h7edee0f_1
mpfr                      4.0.2                h62dcd97_1
mpir                      3.0.0                hec2e145_1
mpldatacursor             0.7.1                    pypi_0    pypi
mpmath                    1.1.0                    py38_0
msgpack-python            1.0.0            py38h74a9793_1
msys2-conda-epoch         20160418                      1
multipledispatch          0.6.0                    py38_0
navigator-updater         0.2.1                    py38_0
nbconvert                 5.6.1                    py38_0
nbformat                  5.0.7                      py_0
networkx                  2.4                        py_1
nltk                      3.5                        py_0
nose                      1.3.7                    py38_2
notebook                  6.0.3                    py38_0
numba                     0.50.1           py38h47e9c7a_0
numexpr                   2.7.1            py38h25d0782_0
numpy                     1.18.5           py38h6530119_0
numpy-base                1.18.5           py38hc3f5095_0
numpydoc                  1.1.0                      py_0
olefile                   0.46                       py_0
opencv-python             4.1.0.25                 pypi_0    pypi
openpyxl                  3.0.4                      py_0
openssl                   1.1.1g               he774522_0
packaging                 20.4                       py_0
pandas                    1.0.5            py38h47e9c7a_0
pandoc                    2.10                          0
pandocfilters             1.4.2                    py38_1
paramiko                  2.7.1                      py_0
parso                     0.7.0                      py_0
partd                     1.1.0                      py_0
path                      13.1.0                   py38_0
path.py                   12.4.0                        0
pathlib2                  2.3.5                    py38_0
pathtools                 0.1.2                      py_1
patsy                     0.5.1                    py38_0
pep8                      1.7.1                    py38_0
pexpect                   4.8.0                    py38_0
pickleshare               0.7.5                 py38_1000
pillow                    7.2.0            py38hcc1f983_0
pip                       20.1.1                   py38_1
pkginfo                   1.5.0.1                  py38_0
pluggy                    0.13.1                   py38_0
ply                       3.11                     py38_0
powershell_shortcut       0.0.1                         2
prometheus_client         0.8.0                      py_0
prompt-toolkit            3.0.5                      py_0
prompt_toolkit            3.0.5                         0
protobuf                  3.11.1                   pypi_0    pypi
psutil                    5.7.0            py38he774522_0
py                        1.9.0                      py_0
py-lief                   0.10.1           py38ha925a31_0
pyasn1                    0.4.8                    pypi_0    pypi
pyasn1-modules            0.2.7                    pypi_0    pypi
pycco                     0.6.0                    pypi_0    pypi
pycodestyle               2.6.0                      py_0
pycosat                   0.6.3            py38he774522_0
pycparser                 2.20                       py_2
pycurl                    7.43.0.5         py38h7a1dbc1_0
pydocstyle                5.0.2                      py_0
pyflakes                  2.2.0                      py_0
pygments                  2.6.1                      py_0
pyinstaller               3.6                      pypi_0    pypi
pylint                    2.4.4                    py38_0
pynacl                    1.4.0            py38h62dcd97_1
pyodbc                    4.0.30           py38ha925a31_0
pyopenssl                 19.1.0                     py_1
pyparsing                 2.4.7                      py_0
pyqt                      5.9.2            py38ha925a31_4
pyqtgraph                 0.10.0                   pypi_0    pypi
pyreadline                2.1                      py38_1
pyrsistent                0.16.0           py38he774522_0
pyserial                  3.4                      pypi_0    pypi
pysocks                   1.7.1                    py38_0
pystache                  0.5.4                    pypi_0    pypi
pytables                  3.6.1            py38ha5be198_0
pytest                    5.4.3                    py38_0
pytest-arraydiff          0.2              py38h39e3cac_0
pytest-astropy            0.8.0                      py_0
pytest-astropy-header     0.1.2                      py_0
pytest-doctestplus        0.7.0                      py_0
pytest-openfiles          0.5.0                      py_0
pytest-remotedata         0.3.2                    py38_0
python                    3.8.3                he1778fa_2
python-can                3.3.3                    pypi_0    pypi
python-dateutil           2.8.1                      py_0
python-jsonrpc-server     0.3.4                      py_1
python-language-server    0.34.1                   py38_0
python-libarchive-c       2.9                        py_0
pytz                      2020.1                     py_0
pywavelets                1.1.1            py38he774522_0
pywin32                   227              py38he774522_1
pywin32-ctypes            0.2.0                    pypi_0    pypi
pywinpty                  0.5.7                    py38_0
pyyaml                    5.3.1            py38he774522_1
pyzmq                     19.0.1           py38ha925a31_1
qdarkstyle                2.8.1                      py_0
qt                        5.9.7            vc14h73c81de_0
qtawesome                 0.7.2                      py_0
qtconsole                 4.7.5                      py_0
qtpy                      1.9.0                      py_0
regex                     2020.6.8         py38he774522_0
requests                  2.24.0                     py_0
rope                      0.17.0                     py_0
rsa                       4.0                      pypi_0    pypi
rtree                     0.9.4            py38h21ff451_1
ruamel_yaml               0.15.87          py38he774522_1
scikit-image              0.16.2           py38h47e9c7a_0
scikit-learn              0.23.1           py38h25d0782_0
scipy                     1.5.0            py38h9439919_0
seaborn                   0.10.1                     py_0
send2trash                1.5.0                    py38_0
serial                    0.0.97                   pypi_0    pypi
setuptools                41.2.0                   pypi_0    pypi
simplegeneric             0.8.1                    py38_2
singledispatch            3.4.0.3                  py38_0
sip                       4.19.13          py38ha925a31_0
six                       1.15.0                     py_0
smartypants               2.0.1                    pypi_0    pypi
snappy                    1.1.8                h33f27b4_0
snowballstemmer           2.0.0                      py_0
sortedcollections         1.2.1                      py_0
sortedcontainers          2.2.2                      py_0
soupsieve                 2.0.1                      py_0
sphinx                    3.1.2                      py_0
sphinxcontrib             1.0                      py38_1
sphinxcontrib-applehelp   1.0.2                      py_0
sphinxcontrib-devhelp     1.0.2                      py_0
sphinxcontrib-htmlhelp    1.0.3                      py_0
sphinxcontrib-jsmath      1.0.1                      py_0
sphinxcontrib-qthelp      1.0.3                      py_0
sphinxcontrib-serializinghtml 1.1.4                      py_0
sphinxcontrib-websupport  1.2.3                      py_0
spyder                    4.1.4                    py38_0
spyder-kernels            1.9.2                    py38_0
sqlalchemy                1.3.18           py38he774522_0
sqlite                    3.32.3               h2a8f88b_0
statsmodels               0.11.1           py38he774522_0
sympy                     1.6.1                    py38_0
tbb                       2020.0               h74a9793_0
tblib                     1.6.0                      py_0
terminado                 0.8.3                    py38_0
testpath                  0.4.4                      py_0
textparser                0.23.0                   pypi_0    pypi
threadpoolctl             2.1.0              pyh5ca1d4c_0
tk                        8.6.10               he774522_0
toml                      0.10.1                     py_0
toolz                     0.10.0                     py_0
tornado                   6.0.4            py38he774522_1
tqdm                      4.47.0                     py_0
traitlets                 4.3.3                    py38_0
typing_extensions         3.7.4.2                    py_0
ujson                     1.35             py38he774522_0
unicodecsv                0.14.1                   py38_0
uritemplate               3.0.0                    pypi_0    pypi
urllib3                   1.25.9                     py_0
vc                        14.1                 h0510ff6_4
vega-datasets             0.7.0                    pypi_0    pypi
vs2015_runtime            14.16.27012          hf0eaf9b_3
watchdog                  0.10.3                   py38_0
wcwidth                   0.2.5                      py_0
webencodings              0.5.1                    py38_1
werkzeug                  1.0.1                      py_0
wheel                     0.34.2                   py38_0
widgetsnbextension        3.5.1                    py38_0
win_inet_pton             1.1.0                    py38_0
win_unicode_console       0.5                      py38_0
wincertstore              0.2                      py38_0
windows-curses            2.1.0                    pypi_0    pypi
winpty                    0.4.3                         4
wrapt                     1.12.1           py38he774522_1
xlrd                      1.2.0                      py_0
xlsxwriter                1.2.9                      py_0
xlwings                   0.19.5                   py38_0
xlwt                      1.3.0                    py38_0
xmltodict                 0.12.0                     py_0
xz                        5.2.5                h62dcd97_0
yaml                      0.2.5                he774522_0
yapf                      0.30.0                     py_0
zeromq                    4.3.2                ha925a31_2
zict                      2.0.0                      py_0
zipp                      3.1.0                      py_0
zlib                      1.2.11               h62dcd97_4
zope                      1.0                      py38_1
zope.event                4.4                      py38_0
zope.interface            4.7.1            py38he774522_0
zstd                      1.4.5                ha9fde0e_0
```
</details>
Hello Team,

I tried reinstalling, again the same issue. 
Steps followed:

- Uninstall Anaconda
- Install latest Python 3.7 64-bit 
- Launch Spyder (it works)
- Run `conda update anaconda`
- Run `conda install spyder=4.1.4`. Spyder no longer works

Error displayed when Spyder launched from Anaconda Environment is mentioned below:
`ARB::createContext: wglCreateContextAttribsARB() failed (GL error code: 0x0) for format: QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize -1, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize -1, samples -1, swapBehavior QSurfaceFormat::SwapBehavior(DefaultSwapBehavior), swapInterval 1, profile  QSurfaceFormat::OpenGLContextProfile(NoProfile)), shared context: 0x0 (The operation completed successfully.)<br>GDI::createContext: wglCreateContext failed. (The operation completed successfully.)<br>Unable to create a GL Context.<br>`

If I try to run my python code via Qt prompt using command `runfile('MyFile.py', wdir='MyDir')`, it says `runfile`  not found. However, I am able to run my script using command `%run "MyFile.py"`

Regards,
Debashish
Hi,

Awaiting your reply.

Thanks & Regards,
Debashish
Hi team, I have the same `IndexError: pop index out of range` error. If I can help with providing any additional information, feel free to reach out.

Downgrading spyder to 4.1.3 solves the error.
Same problem here. 

spyder 4.1.4
python 3.8.3
qt 5.9.7
pyqt 5.9.2
Same problem 4.1.4 did work for a while then would not start giving similar error message.
Downgrading to 4.1.3 works perfectly.
To all people that have posted here: please close Spyder, open the Anaconda Prompt, run there

    spyder --reset

and try again.
`spyder --reset` worked for me.

Before running that command, I made a backup of my .spyder-py3 folder to copy the old files back and see what might have caused the problem. Initially it seemed as if the `pylint.results` file might have been the culprit, but now I can't reproduce it. Maybe someone could try to simply delete that file and see if that solves things.
> Initially it seemed as if the pylint.results

Yes. that's the culprit.
Same problem: `spyder --reset` worked
I can confirm that only deleting the `pylint.results` file solves the error so there is no need for the `spyder --reset` command in case someone wants to keep their preferences.
@steff456, please take a look at this one to prevent it from happening (it's a very serious bug).
My problem is that I reverted back to Spyder 4.1.3.
My Anaconda will not allow any upgrade to 4.1.4 so that I can try the suggested workarounds.
It tells me there is an upgrade available but when run it just finishes without upgrading to 4.1.4.


Resolving patch:
diff --git a/spyder/plugins/pylint/widgets/pylintgui.py b/spyder/plugins/pylint/widgets/pylintgui.py
--- a/spyder/plugins/pylint/widgets/pylintgui.py
+++ b/spyder/plugins/pylint/widgets/pylintgui.py
@@ -274,9 +274,12 @@ def set_filename(self, filename):
             self.curr_filenames.insert(0, filename)
             self.filecombo.setCurrentIndex(0)
         else:
-            index = self.filecombo.findText(filename)
-            self.filecombo.removeItem(index)
-            self.curr_filenames.pop(index)
+            try:
+                index = self.filecombo.findText(filename)
+                self.filecombo.removeItem(index)
+                self.curr_filenames.pop(index)
+            except IndexError:
+                self.curr_filenames.remove(filename)
             self.filecombo.insertItem(0, filename)
             self.curr_filenames.insert(0, filename)
             self.filecombo.setCurrentIndex(0)


Test patch: