ModuleNotFoundError: No module named 'lldb.embedded_interpreter'

[iamanonymouscs]

lldb is already the newest version (1:15.0-55~20220216125911.2).

$ lldb --version
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'lldb.embedded_interpreter'
lldb version 15.0.0

[llvmbot]

@llvm/issue-subscribers-lldb

[JDevlieghere]

We'll need a little bit more information. What platform are you on? How did you install lldb?

[iamanonymouscs]

I am running lldb in Ubuntu 22.04 LTS. Following is the platform information:

$ uname -a
Linux ea22053d0460 5.10.104-linuxkit #1 SMP Thu Mar 17 17:08:06 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

I installed the development branch of lldb following this website (LLVM Ubuntu nightly packages): https://apt.llvm.org/

[iamanonymouscs]

We'll need a little bit more information. What platform are you on? How did you install lldb?

I think it is worthy to note that my ubuntu is running inside a container.

[nlsandler]

I see the same behavior in LLDB 14 on Ubuntu 20.04 (not running in a container), installed with
bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"

[tgfrerer]

I had the same situation as @nlsandler - following the steps outlined in this bug report on launchpad.net: https://bugs.launchpad.net/ubuntu/+source/llvm-defaults/+bug/1972855 solved it for me.

It appears that the issue is down to a mismatch in python paths.

[michael-swan]

I suspect OP's issue is the same as mine. lldb -P returns /usr/lib/lib/python3.8/site-packages for LLDB builds from deb http://apt.llvm.org/focal/ llvm-toolchain-focal-14 repos. It should instead return /usr/lib/llvm-14/lib/python3.8/site-packages which is where these Python dependencies are installed. Any ideas where this mistake originates?

[fonqL]

Same here. Win10 wsl2. After updating Ubuntu from 20.04 to 22.04, I found lldb still kept version 10 so I ran apt-get -u dist-upgrade and upgraded again. lldb turned to version 14.0.0 now but came with this problem.

[amordo]

Thanks for the link, @tgfrerer
tldr: lldb -P prints destination, which doesn't exist; do mkdir -p /usr/lib/local/lib/python3.10 && ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages /usr/lib/local/lib/python3.10/dist-packages
maybe your llvm-14 dir is located/named different🙂

[jason-kane]

with ubuntu 22.04 and swift 5.7 I had to:

apt install python3-lldb-14
ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

before "swift repl" would work without errors.

[junaire]

with ubuntu 22.04 and swift 5.7 I had to:

apt install python3-lldb-14
ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

before "swift repl" would work without errors.

I'm on ubuntu22, installed lldb by apt. this works for me. Thanks!

[unlsycn]

with ubuntu 22.04 and swift 5.7 I had to:

apt install python3-lldb-14
ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

before "swift repl" would work without errors.

works for me on WSL2. thx!

[miguno]

Same here on WSL2 with Ubuntu 22.04 with latest updates applied, lldb installed via apt.

 $ lldb --version
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'lldb.embedded_interpreter'
lldb version 14.0.0

 $ lldb -P
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'lldb.embedded_interpreter'
/usr/lib/local/lib/python3.10/dist-packages
 $ ls -l /usr/lib/local/lib/python3.10/dist-packages
ls: cannot access '/usr/lib/local/lib/python3.10/dist-packages': No such file or directory

Workaround fix, thanks to #55575 (comment):

$ sudo ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

[albertlarsan68]

If you aren't admin, you can work around this by setting your PYTHONPATH env variable to /usr/lib/llvm-14/lib/python3.10/dist-packages.

[castaway-]

Same here with Ubuntu v22.10 / lldb v15.0.6 ;)

lldb -P would give me:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'lldb.embedded_interpreter'
/usr/lib/local/lib/python3.10/dist-packages

Workaround using proper path for lldb v15
sudo ln -s /usr/lib/llvm-15/lib/python3.10/dist-packages/lldb /usr/lib/local/lib/python3.10/dist-packages/lldb

the correct path should use "llvm-xx" instead of "local", that was the only diff
Thanks for the temporary fix !

[Selyss]

ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

worked for me on WSL2, thanks!

[fwqaaq]

sudo ln -s /usr/lib/llvm-14/lib/python3.10/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

Thanks, and add sudo for this command.

[loop-evgeny]

The workaround works, but it would be great to fix this finally. This has been open for over a year and has wasted time for a lot of people.

[JetForMe]

I just installed Swift 5.9 on Debian 12 (on a RPi Pico) and ran into this issue running the Swift REPL. Eventually I found this issue. I tried the above command to link the bits, but now I get this:

$ swift repl
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/lldb/__init__.py", line 952, in <module>
    eArgTypeReproducerProvider = _lldb.eArgTypeReproducerProvider
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module '_lldb' has no attribute 'eArgTypeReproducerProvider'
Welcome to Swift version 5.9.1 (swift-5.9.1-RELEASE).
Type :help for assistance.
  1>  

UTA: This is with lldb-15 and python3-lldb-15.

[DavidSpickett]

That type was removed in 70599d7, which was first present in lldb 16.

I can't tell who's throwing that error, could be a mismatch between the version swift expects to find and the installed library version.

[JinjieZhao]

export PYTHONPATH=/lib/llvm-14/lib/python3.10/dist-packages:$PYTHONPATH
it works.

[createyourpersonalaccount]

There's a bug report on Debian 12. You can append

export PYTHONPATH="/usr/lib/llvm-14/lib/python3.11/dist-packages/:$PYTHONPATH"

to your ~/.bashrc and the error will go away.

[loop-evgeny]

Even with the workaround, this is quite annoying when trying to automate LLDB installation, because the LLDB version and Python versions differ between Ubuntu versions, so you have to script detecting the installed versions somehow.

Is this something LLDB developers can fix or is it a packaging issue?

[GitMensch]

Both...

You can commonly work around this by switching to the LLDB version that does not have that module any more

sudo apt install lldb-16
sudo update-alternatives --install /usr/bin/lldb lldb /usr/bin/lldb-16 50

fixed that for me on newer systems and if that version isn't available (older systems)

sudo apt install lldb-15
sudo update-alternatives --install /usr/bin/lldb lldb /usr/bin/lldb-15 50
export PYTHONPATH="/usr/lib/llvm-15/lib/python3.10/dist-packages/:$PYTHONPATH"
echo 'export PYTHONPATH="/usr/lib/llvm-15/lib/python3.10/dist-packages/:$PYTHONPATH"' >> ~/.bashrc