A timeout might probably happen at Kernel startup (and restart)

[davidcl]

The kernel startup looks rather slow and some stderr messages are printed. This seems to indicate that a timeout is happening behind the scene which slow down the kernel starting phase.

The stderr is:

[MetaKernelApp] ERROR | Can't load 'E:\nosave\scoop\apps\miniconda3\current\lib\site-packages\metakernel\magics\shell_magic.py': error: <pexpect.popen_spawn.PopenSpawn object at 0x0000016F4AC820E0>
searcher: searcher_re:
    0: re.compile('>')
<pexpect.popen_spawn.PopenSpawn object at 0x0000016F4AC820E0>
searcher: searcher_re:
    0: re.compile('>')

[davidcl]

It looks related to the ShellMagic powershell implementation. On replwrap.py setprompt(..), there is an expect on prompt_regex before enforcing the specific prompt. When the user modified its prompt on the $PROFILE, the expect timeout !