[INSTRM-1071] matplotlib error caused plotTool to crash

Mon, 21 Dec 2020 11:27:11 +0000

Hitting Return after changing the name of a curve caused a plotTool crash (that is usually OK to do):

QXcbClipboard: SelectionRequest too old
QXcbClipboard: SelectionRequest too old
Traceback (most recent call last):
  File "/software/mhs/products/Linux64/ics_sps_engineering_plotData/1.1.8/python/sps_engineering_plotData/navigationtoolbar.py", line 40, in edit_parameters
    NavigationToolbar2QT.edit_parameters(self)
  File "/software/conda/envs/anaconda_2019.07/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 783, in edit_parameters
    figureoptions.figure_edit(ax, self)
  File "/software/conda/envs/anaconda_2019.07/lib/python3.7/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 264, in figure_edit
    apply_callback(data)
  File "/software/conda/envs/anaconda_2019.07/lib/python3.7/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 207, in apply_callback
    axes.xaxis.set_units(xunits)
  File "/software/conda/envs/anaconda_2019.07/lib/python3.7/site-packages/matplotlib/axis.py", line 1574, in set_units
    self.callbacks.process('units')
  File "/software/conda/envs/anaconda_2019.07/lib/python3.7/site-packages/matplotlib/cbook/__init__.py", line 212, in process
    for cid, ref in list(self.callbacks.get(s, {}).items()):
RuntimeError: dictionary changed size during iteration
Aborted

This crashed the entire app, which was monitoring three cold cryostats.

I'll note that before that, there were many of those QXcbClipboard errors:

(anaconda_2019.07) pfs@tron:~$ grep '^QXcbClipboard: SelectionRequest too old' nohup.out | wc
19921912 79687648 796876480

No idea whether/if that is related.

PFS-JIRA

[INSTRM-1071] matplotlib error caused plotTool to crash