Crash when any host or cluster is given

[oddnoc]

Invoking i2cssh crashes with RuntimeError: There is no current event loop in thread 'MainThread'. when invoked with 1 or more host arguments. This happens with or without my .i2csshrc and even on a fresh install of homebrew and only i2cssh installed.

My config

1. Include your ~/.i2csshrc (if you have one) -- no file
2. i2cssh qis (where qis is a cluster in .i2cssh) or i2cssh -m user@host1.example.org -m user@host2.example.org when there is no .i2cssh)

Expected behavior
An iTerm2 tab should be created with one pane per host.

Stack trace

Traceback (most recent call last):
File "/opt/homebrew/bin/i2cssh", line 7, in
sys.exit(main())
~~~~^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/i2cssh/main.py", line 6, in main
app(prog_name="i2cssh")
~~~^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1157, in call
return self.main(*args, **kwargs)
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1078, in main
rv = self.invoke(ctx)
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/i2cssh/lib.py", line 303, in app
iterm2.run_until_complete(
~~~~~~~~~~~~~~~~~~~~~~~~~^
exec_in_iterm(groups, cmdline_opts, global_opts, current_path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 507, in run_until_complete
return Connection().run_until_complete(coro, retry, debug)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 155, in run_until_complete
return self.run(False, coro, retry, debug)
~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 220, in run
loop = asyncio.get_event_loop()
File "/opt/homebrew/Cellar/python@3.14/3.14.2/Frameworks/Python.framework/Versions/3.14/lib/python3.14/asyncio/events.py", line 715, in get_event_loop
raise RuntimeError('There is no current event loop in thread %r.'
% threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'MainThread'.

[wouterdebie]

This looks like a bug in the iterm2 library. Only guess is that this particular version isn't compatible with Python 3.14. can you try with Python 3.12?

…

On Wed, Dec 17, 2025, 17:23 Fred Condo ***@***.***> wrote: *oddnoc* created an issue (wouterdebie/i2cssh#148) <#148> Invoking i2cssh crashes with RuntimeError: There is no current event loop in thread 'MainThread'. when invoked with 1 or more host arguments. This happens with or without my .i2csshrc and even on a fresh install of homebrew and only i2cssh installed. *My config* 1. Include your ~/.i2csshrc (if you have one) -- no file 2. i2cssh qis (where qis is a cluster in .i2cssh) or i2cssh -m ***@***.*** -m ***@***.*** when there is no .i2cssh) *Expected behavior* An iTerm2 tab should be created with one pane per host. *Stack trace* Traceback (most recent call last): File "/opt/homebrew/bin/i2cssh", line 7, in sys.exit(main()) ~~~~^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/i2cssh/main.py", line 6, in main app(prog_name="i2cssh") ~~~^^^^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1157, in *call* return self.main(*args, **kwargs) ~~~~~~~~~^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1078, in main rv = self.invoke(ctx) File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 1434, in invoke return ctx.invoke(self.callback, **ctx.params) ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/click/core.py", line 783, in invoke return __callback(*args, **kwargs) File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/i2cssh/lib.py", line 303, in app iterm2.run_until_complete( ~~~~~~~~~~~~~~~~~~~~~~~~~^ exec_in_iterm(groups, cmdline_opts, global_opts, current_path) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 507, in run_until_complete return Connection().run_until_complete(coro, retry, debug) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 155, in run_until_complete return self.run(False, coro, retry, debug) ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/i2cssh/0.2.1/libexec/lib/python3.14/site-packages/iterm2/connection.py", line 220, in run loop = asyncio.get_event_loop() File ***@***.***/3.14.2/Frameworks/Python.framework/Versions/3.14/lib/python3.14/asyncio/events.py", line 715, in get_event_loop raise RuntimeError('There is no current event loop in thread %r.' % threading.current_thread().name) RuntimeError: There is no current event loop in thread 'MainThread'. — Reply to this email directly, view it on GitHub <#148>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABKABTJLR7QE3CWA3OHWCL4CHQX3AVCNFSM6AAAAACPLYVTHSVHI2DSMVQWIX3LMV43ASLTON2WKOZTG42DAOBRHA4DCNY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[oddnoc]

Thanks for your reply!

Pardon my naïveté when it comes to python and homebrew internals. I changed the shebang line of /opt/homebrew/bin/i2cssh to #!/usr/bin/env python3.12 (after installing python@3.12) and now receive this error:

Traceback (most recent call last):
  File "/opt/homebrew/bin/i2cssh", line 4, in <module>
    from i2cssh.main import main
ModuleNotFoundError: No module named 'i2cssh'

[wouterdebie]

This is because you'd need to install i2cssh into the python 3.12 environment. I can have a look later for an actual fix.

…

On Thu, Dec 18, 2025 at 12:00 PM Fred Condo ***@***.***> wrote: *oddnoc* left a comment (wouterdebie/i2cssh#148) <#148 (comment)> Thanks for your reply! Pardon my naïveté when it comes to python and homebrew internals. I changed the shebang line of /opt/homebrew/bin/i2cssh to #!/usr/bin/env python3.12 (after installing ***@***.***) and now receive this error: Traceback (most recent call last): File "/opt/homebrew/bin/i2cssh", line 4, in <module> from i2cssh.main import main ModuleNotFoundError: No module named 'i2cssh' — Reply to this email directly, view it on GitHub <#148 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABKABSAFQZDJJE6GJ4SJRT4CLTUHAVCNFSM6AAAAACPLYVTHSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMNZRGQ3DCMJYGA> . You are receiving this because you commented.Message ID: ***@***.***>

[oddnoc]

What I have done is revert my homebrew from a backup and then pinned python (happens to be 3.13), as well as i2cssh, which now works. Now I can update other formulae without breaking i2cssh again. Thanks for looking into it!

[wouterdebie]

Glad it worked!

…

On Thu, Dec 18, 2025 at 1:02 PM Fred Condo ***@***.***> wrote: *oddnoc* left a comment (wouterdebie/i2cssh#148) <#148 (comment)> What I have done is revert my homebrew from a backup and then pinned python (happens to be 3.13), as well as i2cssh, which now works. Now I can update other formulae without breaking i2cssh again. Thanks for looking into it! — Reply to this email directly, view it on GitHub <#148 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABKABSMAIKIRO76SEQCYAL4CL25DAVCNFSM6AAAAACPLYVTHSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMNZRG44DQOBTGU> . You are receiving this because you commented.Message ID: ***@***.***>

[Tolsi]

Any fix for everyone?

[damientkk]

I am unable to go the brew backup route as did user oddnoc. Can you advise I can "install i2cssh into the python 3.12 environment" in the meantime.