Windows binary crashes: ATR bytes are not JSON serializable

[SenteQuentinADACRB]

Environment

• OS: Windows
• eID reader: [reader model]
• Belgian eID middleware version: [version]
• Downloaded package: eidreader-1.0.9.zip

Steps to reproduce

1. Install eidreader.exe and register the beid:// URL protocol.
2. Ensure the handler points to the actual executable:
   C:\eidreader\eidreader\eidreader.exe
3. Insert a Belgian eID card into the reader.
4. Trigger the beid:// handler from the browser using the "Read eID card" action.

Actual result

eidreader.exe starts, detects the reader/card, then crashes with:

Failed to execute script 'eidreader' due to unhandled exception:
Object of type bytes is not JSON serializable

Traceback (most recent call last):
  File "eidreader.py", line 300, in <module>
  File "eidreader.py", line 259, in main
  File "json\__init__.py", line 235, in dumps
  File "json\encoder.py", line 202, in encode
  File "json\encoder.py", line 263, in iterencode
  File "json\encoder.py", line 182, in default
TypeError: Object of type bytes is not JSON serializable
when serializing dict item 'ATR'

[labomatik]

This is a regression in 1.0.9, introduced by commit c72aabf ("New command-line option --verbose", 2026-04-01), which added a else branch to the label dispatch in eid2dict():

      else:                                                                                                                                     
          logger.debug("Unknown label %r", label)                                                                                               
          data[label] = value      # <- raw bytes  

Before that commit, labels matching none of _utf8 / _ascii / _binary / _blob were simply not stored — which was the explicit purpose of commit 589f684 (PR #9, 2022-08-17), titled "Fix - Object of type bytes is not JSON serializable / Ignore Eid elements which are not defined in any array".

[lsaffre]

Thanks for your research, @labomatik !

Haha, 4 hours ago (when you wrote this comment) I had finally managed to visit a friend with a Belgian id card where I could reproduce the problem and fix it. Seems that my own Belgian id card is defect, that's why I hadn't seen this problem before. I'm not sure whether the problem was introduced together with the -v command-line option, I'd rather say that some recent Python version has become more strict regarding byte-code encoding.
Anyway, the problem is fixed with version 1.0.10, which I pushed to the GitLab repository and released to PyPI.
Yes, sorry, I moved this repository from GitHub to GitLab some time ago but forgot to update the README file. I have now added a note to the README file about the move and will soon archive this repository.