Bug#1005171: aegisub: Select overlaps option cause runtime error bad argument #1 to 'ipairs' (table expected, got userdata)

[user]

Package: aegisub
Version: 3.2.2+dfsg-6+b1
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

* What led up to the situation?

Triggering action from Aegisub menu.

* What exactly did you do (or not do) that was effective (or
ineffective)?

I have loaded this subtitle file
https://mega.nz/file/1pcxyCJb#K5kiXHwCMalfX7gKj9XvbC6cGFp7rzQd4mMWV0IXqzQ
though further error shows also for any other .srt subtitles i have tried.
Automation -> Select overlaps

* What was the outcome of this action?

Lua reported a runtime error:
File "/usr/share/aegisub/automation/autoload/select-overlaps.moon", line 34
<anonymous function at lines 22-49>
File "<C function>", line -1
?
bad argument #1 to 'ipairs' (table expected, got userdata)


-- System Information:
Debian Release: 11.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500,
'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-11-amd64 (SMP w/16 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages aegisub depends on:
ii libasound2 1.2.4-1.1
ii libass9 1:0.15.0-2
ii libboost-chrono1.74.0 1.74.0-9
ii libboost-filesystem1.74.0 1.74.0-9
ii libboost-locale1.74.0 1.74.0-9
ii libboost-regex1.74.0 [libboost-regex1.74.0-icu67] 1.74.0-9
ii libboost-thread1.74.0 1.74.0-9
ii libc6 2.31-13+deb11u2
ii libffms2-4 2.23-4
ii libfftw3-double3 3.3.8-2
ii libfontconfig1 2.13.1-4.2
ii libgcc-s1 10.2.1-6
ii libgl1 1.3.2-1
ii libhunspell-1.7-0 1.7.0-3
ii libicu67 67.1-7
ii libluajit-5.1-2 2.1.0~beta3+dfsg-5.3
ii libpulse0 14.2-2
ii libstdc++6 10.2.1-6
ii libwxbase3.0-0v5 3.0.5.1+dfsg-2
ii libwxgtk3.0-gtk3-0v5 3.0.5.1+dfsg-2
ii zlib1g 1:1.2.11.dfsg-2

aegisub recommends no packages.

Versions of packages aegisub suggests:
ii aegisub-l10n 3.2.2+dfsg-6