1759547 - MozillaBuild 4.0pre0: moz-phab install-certificate "lost sys.stderr"

Status: RESOLVED WORKSFORME

(Firefox Build System :: MozillaBuild, defect)

Description

[Mitchell Hentges [:mhentges] 🦀]

$ moz-phab install-certificate
Starting up..
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RuntimeError: input(): lost sys.stderr
Run moz-phab again with '--trace' to show debugging output

Comment 1

[Mitchell Hentges [:mhentges] 🦀]

I've narrowed this down to the following minimal repro:

1. Install Windows-native Python
2. In powershell: pip3 install mozphab==1.0.0
3. Edit C:\Users\<user>AppData\Local\Programs\Python\Python39\Lib\site-packages\mozphab, delete everything except mozphab.py
4. Replace mozphab.py with the following contents:

try:
    input(":) ?")
except Exception as e:
    print(e)

5. In MozillaBuild 4.0pre0, run moz-phab. You'll get the following output:

$ moz-phab
input(): lost sys.stderr

Note that running python3 'C:\Users\<user>AppData\Local\Programs\Python\Python39\Lib\site-packages\mozphab\mozphab.py' directly does work.
I'm guessing this has to do with the way Python generates .exe files in Scripts\.

Comment 2

[Mitchell Hentges [:mhentges] 🦀]

This is because my Windows Python installation was using pip==22.0.3, which is affected by this bug.
Updating pip (python -m pip install --upgrade pip) then re-installing mozphab (python -m pip install --ignore-installed mozphab) resolved the issue.