aurman: aurman fails to run on Raspberry Pi 2

Description

I wanted to update my Archlinux on my Raspberry Pi 2 like I used to do every one or two weeks. After the latest update using aurman (in which aurman itself was updated also from 2.14 to 2.16) I ran into this issue. Apparently this issue only appears on my Raspberry Pi 2 armv7h platform. On x86_64 the error did not appear.

Expected Behavior

aurman --version should return 2.16-1 or anything similar

Current Behavior

This is what I got:

2018-07-04 23:10:34,521 - wrappers - expac - ERROR - expac query -Q %v - for targets ['aurman-git', 'aurman'] failed
2018-07-04 23:10:34,523 - main - main - ERROR - 
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/aurman/main.py", line 835, in main
    process(argv[1:])
  File "/usr/lib/python3.6/site-packages/aurman/main.py", line 345, in process
    show_version()
  File "/usr/lib/python3.6/site-packages/aurman/main.py", line 85, in show_version
    aurman_note(expac("-Q", ["v"], ["aurman-git", "aurman"])[0])
  File "/usr/lib/python3.6/site-packages/aurman/wrappers.py", line 69, in expac
    raise InvalidInput("expac query {} for targets {} failed".format(query_stringified, targets))
aurman.own_exceptions.InvalidInput: expac query -Q %v - for targets ['aurman-git', 'aurman'] failed

Possible Solution

Sorry, I wouldn’t know, seems related to platform.

Version of aurman you are using

Latest package on AUR (2.16-1)

Steps to Reproduce

1. aurman --version or -V
2. Also tried aurman -Syu with similar result:

2018-07-04 23:20:40,564 - wrappers - expac - ERROR - expac query -Q '%n?!%v?!%D?!%H?!%o?!%P?!%T?!%e?!%G?!%w' - for targets ['faad2', 'bash', ...........] failed

1. Tried updating expac-git manually from AUR --> no change in behaviour
2. Tried replacing expac-git by expac from stable --> no change in behaviour

Read the README

Yes, I did!

Running linux distribution

Linux RPIarch 4.14.52-1-ARCH #1 SMP Thu Jun 28 00:45:47 UTC 2018 armv7l GNU/Linux