There is no current event loop in thread 'MainThread'.

[Norvon]

Traceback (most recent call last):
File "/Users/mine/.local/bin/idb", line 7, in
sys.exit(main())
~~~~^^
File "/Users/mine/.local/pipx/venvs/fb-idb/lib/python3.14/site-packages/idb/cli/main.py", line 353, in main
loop = asyncio.get_event_loop()
File "/opt/homebrew/Cellar/python@3.14/3.14.0_1/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'.

[eelco2k]

Python Version	get_event_loop() Behavior
≤ 3.9	Auto-creates event loop if missing
≥ 3.10	Raises RuntimeError if no loop exists

so workaround would be to use version 3.9

[eelco2k]

or update your main.py:

search for the def main function and change it to:

def main(cmd_input: Optional[List[str]] = None) -> int:
    return asyncio.run(gen_main(cmd_input))

[romanr]

$ pipx install fb-idb

installed package fb-idb 1.1.7, installed using Python 3.14.2
These apps are now globally available
- idb

$ idb

Traceback (most recent call last):
....
/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'.

While I was able to make it work by installing 3.9, but it's temporary solution as it wil cease to exist in 2026-10:

brew install python@3.9

==> Fetching downloads for: python@3.9
Warning: python@3.9 has been deprecated because it is deprecated upstream! It will be disabled on 2026-10-15.

pipx install --python /opt/homebrew/bin/python3.9 fb-idb

[friederbluemle]

Here is the one-line change that fixed it for my locally running Python 3.14.2 installation:

In idb/cli/main.py:

 def main(cmd_input: Optional[List[str]] = None) -> int:
-    loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
     try:
         return loop.run_until_complete(gen_main(cmd_input))
     finally:

[Norvon]

python3 -m venv .venv

def main(cmd_input: Optional[List[str]] = None) -> int:
    try:
        loop = asyncio.get_event_loop()
    except RuntimeError:
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
    try:
        return loop.run_until_complete(gen_main(cmd_input))
    finally:
        loop.close()

[zetlen]

I don't know that this really is completed! It's still a bug!