if kernel died because of memory, jupyter lab is stuck

[karthikeyann]

Problem:

If the kernel died in jupyter-lab, it does not show any warning or error. It is just stuck.
But when I use jupyter notebook, I get the following error properly

Kernel Restarting
The kernel appears to have died. It will restart automatically.

Jupyter lab does not give any warning or message; the cell appears to be in running state.

Method to reproduce:

Allocate very large numpy array more than the memory of the machine.

[jasongrout]

We may need to bump this to Future to handle in the work in #4724.

[jasongrout]

Closing as a duplicate of #4273 - let's move the conversation over there.