WorkingDir of subdir of a volume mount is not found by Python's os.getcwd()

[adamkerz]

• I have tried with the latest version of my channel (Stable or Edge)
• I have uploaded Diagnostics
• Diagnostics ID: BCFAE496-38CD-4C65-874D-E51FB949BA6B/20200205045509

Expected behavior

Running python -c "import os; os.getcwd()" should succeed

Actual behavior

Traceback (most recent call last):
  File "<string>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory

Same problem when running os.getcwd() from within a script.

Information

I am running docker desktop 2.2.0.0 (42247), engine 19.03.5
It is not present in docker desktop 2.1.0.3, engine 19.03.2
Windows: 1909 (18363.628), not virtualised

Steps to reproduce the behavior

Dockerfile

FROM python:3.6.8-stretch
WORKDIR /my_dir/working

Run in cmd:

set CWD_BUG_DIR=C:\cwd_1_bug\my_dir
mkdir %CWD_BUG_DIR%
mkdir %CWD_BUG_DIR%\working

docker build --no-cache -t docker_cwd_bug .
# bug
docker run -it -v %CWD_BUG_DIR%:/my_dir docker_cwd_bug python -c "import os; os.getcwd()"
# ok - mounting the actual working dir appears to avoid the issue
docker run -it -v %CWD_BUG_DIR%\working:/my_dir/working docker_cwd_bug python -c "import os; os.getcwd()"

[mat007]

I think this might be a variant of #5550 ?

[mat007]

I wasn’t able to reproduce it by the way, does it occur every time for you?
Also I’m running this new private which fixes some related issues, would you mind trying it as well?
It’s https://download-stage.docker.com/win/stable/42579/Docker%20Desktop%20Installer.exe

[adamkerz]

Yep, every time. OK, I'll have a go of the private version tomorrow.

[vchirikov]

@mat007 thanks, the issue with fs is fixed.

---

edited:
Not completely, sometimes it was repeated again. I will downgrade docker..

[AlJohri]

I briefly experienced this same error in Docker for Mac 2.2.0.0. I discovered it when random things with Python's pathlib were failing such as running .resolve() or .stem. The root cause was that python's os.getcwd() was returning file not found error. I'm using vscode with a docker container which mounts the current file system directory.

Closing vscode and starting again somehow resolved the error for now?

[adamkerz]

This appears to be fixed for me in v2.2.0.3 (42716) - thank you very much all devs!

[docker-robott]

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