Pydantic JSON Validation Failure on 06.01.2025

[tPkl]

Which ISO version are you using?

2025-06-01

The installation log

[2025-06-28 05:38:26] - DEBUG - Hardware model detected: Dell Inc. Inspiron 7506 2n1; UEFI mode: True
[2025-06-28 05:38:26] - DEBUG - Processor model detected: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
[2025-06-28 05:38:26] - DEBUG - Memory statistics: 14605996 available out of 16090592 total installed
[2025-06-28 05:38:26] - DEBUG - Could not detect virtual system: ['/usr/bin/systemd-detect-virt'] exited with abnormal exit code [1]: none

[2025-06-28 05:38:26] - DEBUG - System is not running in a VM: ['/usr/bin/systemd-detect-virt'] exited with abnormal exit code [1]: none

[2025-06-28 05:38:26] - DEBUG - Virtualization detected: None; is VM: False
[2025-06-28 05:38:26] - DEBUG - Graphics devices detected: dict_keys(['Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] (rev 01)', 'Intel Corporation DG1 [Iris Xe MAX Graphics] (rev 01)'])
[2025-06-28 05:38:26] - ERROR - Traceback (most recent call last):
  File "/usr/lib/python3.13/site-packages/archinstall/__init__.py", line 103, in run_as_a_module
    rc = main()
  File "/usr/lib/python3.13/site-packages/archinstall/__init__.py", line 81, in main
    _log_sys_info()
    ~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/archinstall/__init__.py", line 35, in _log_sys_info
    debug(f'Disk states before installing:\n{disk_layouts()}')
                                             ~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/archinstall/lib/disk/utils.py", line 105, in disk_layouts
    lsblk_output = get_lsblk_output()
  File "/usr/lib/python3.13/site-packages/archinstall/lib/disk/utils.py", line 65, in get_lsblk_output
    return _fetch_lsblk_info()
  File "/usr/lib/python3.13/site-packages/archinstall/lib/disk/utils.py", line 44, in _fetch_lsblk_info
    return LsblkOutput.model_validate_json(output)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/usr/lib/python3.13/site-packages/pydantic/main.py", line 746, in model_validate_json
    return cls.__pydantic_validator__.validate_json(
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        json_data, strict=strict, context=context, by_alias=by_alias, by_name=by_name
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
pydantic_core._pydantic_core.ValidationError: 1 validation error for LsblkOutput
blockdevices.3.children.0.type
  Input should be a valid string [type=string_type, input_value=None, input_type=NoneType]
    For further information visit https://errors.pydantic.dev/2.11/v/string_type

[2025-06-28 05:38:26] - WARNING - Archinstall experienced the above error. If you think this is a bug, please report it to
https://github.com/archlinux/archinstall and include the log file "/var/log/archinstall/install.log".

Hint: To extract the log from a live ISO 
curl -F'file=@/var/log/archinstall/install.log' https://0x0.st

describe the problem

Description of the issue

Newbie here. Tried to use archinstall on a recently wiped Dell laptop. I've tried using multiple different ISO images for arch, and I used Rufus to burn the image on a 32gb USB drive (tried both MBR and GPT, DD image and ISO). Running archinstall leads to the above error seen. I tried to use pacman -Sy archinstall and updated the version to 3.0.8, but I still get the same error. I tried to run pacman -Syu but didn't have enough space on the live environment for the updates.

Here is my lsblk -J -O output, since I saw a similar issue where they provided this. I don't know how to read it: https://0x0.st/8l7G.json

Please provide me with the steps I should take to get past this python error, whether I need to tweak my boot image or some other command I'm not familiar with. Thanks!

[svartkanin]

This should be fixed in master #3633