[Bug Report] Unexpected token: <EOF> at line 1, column 1

[afknst]

Describe the bug
One day I suddenly got "HTTP 500: Internal server error. Please try again later." from the HOME and LIBRARY pages.
And from terminal log:
[ERROR] 2022/04/18 13:35:39 | Unexpected token: <EOF> at line 1, column 1

Then I tried to upgrade (from v0.26.0 to v0.26.2), to delete the database and regenerate, to recompile de docker image, nothing worked.
I was thinking that a file in my library may be damaged. But the scanner works fine, I got the error only when I access the main page. So I don't know.

To Reproduce
I don't know.

Expected behavior
Functioning normally.

Environment (please complete the following information):

• OS: docker / arm32v7
• Browser chrome
• Mango Version 0.26.0, 0.26.1, 0.26.2

Docker (if you are running Mango in a Docker container)
It's not a problem of docker.

Additional context

[afknst]

Searched a bit and I think this may be a problem of crystal json parser.
It works well after deleting all generated json files.
Please, stop managing reading process by the creepy json files. You have a sql database to do that.

Solution, in the library, run
find . -type f -name '*.json' -exec rm {} \;

Btw you'll lose all your reading process if you do this.
I did it since I don't know which json file is damaged and I was too lazy to find out.

[KandyWrong]

For anyone who stumbles across this same problem and doesn't want to go through a bazillion JSON files to find the broken one, here's a quick work-around.

First, install jsonlint-php with:
sudo apt install jsonlint-php

(substitute the package manager for whatever distro you're using)

Then run this command inside your manga directory:
find . -name \*.json -print0 | xargs -0I {} jsonlint-php -q '{}'

I stole all this from https://superuser.com/a/699897

You might be able to repair the broken JSON. I just deleted it and mango regenerated it.