RuntimeError when interrupting kernel

[peleonard]

Description

What steps will reproduce the problem?

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

Please provide any additional information below

File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/plugins/projects.py", line 181, in
triggered=lambda v, path=project: self.open_project(path=path))
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/plugins/projects.py", line 270, in open_project
self.restart_consoles()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/plugins/projects.py", line 388, in restart_consoles
self.main.ipyconsole.restart()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/plugins/ipythonconsole.py", line 1335, in restart
self.close_client(client=client, force=True)
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/plugins/ipythonconsole.py", line 1253, in close_client
client.stop_button_click_handler()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/widgets/ipythonconsole/client.py", line 237, in stop_button_click_handler
self.interrupt_kernel()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/spyder/widgets/ipythonconsole/client.py", line 393, in interrupt_kernel
self.shellwidget.request_interrupt_kernel()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/qtconsole/frontend_widget.py", line 345, in request_interrupt_kernel
self.interrupt_kernel()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/qtconsole/frontend_widget.py", line 638, in interrupt_kernel
self.kernel_manager.interrupt_kernel()
File "/Users/LZQ/anaconda3/lib/python3.6/site-packages/jupyter_client/manager.py", line 408, in interrupt_kernel
raise RuntimeError("Cannot interrupt kernel. No kernel is running!")
RuntimeError: Cannot interrupt kernel. No kernel is running!

Version and main components

• Spyder Version: 3.2.4
• Python Version: 3.6.3
• Qt Versions: 5.6.2, PyQt5 5.6 on Darwin

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  :  0.20.3 (OK)
numpy >=1.7      :  1.13.3 (OK)
sphinx >=0.6.6   :  1.6.3 (OK)
rope >=0.9.4     :  0.10.5 (OK)
jedi >=0.9.0     :  0.10.2 (OK)
psutil >=0.3     :  5.4.0 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
sympy >=0.7.3    :  1.1.1 (OK)
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    :  1.7.4 (OK)

[ccordoba12]

@dalthviz, please catch the RuntimeError around self.shellwidget.request_interrupt_kernel() and pass.