Variant products do not appear after Dolibarr 18.04 to 19.0. update

[umigun]

Hello, I upgraded from 18.0.4 to 19.0.0 due to some bug fixes.
And unfortunately it was an interesting mistake.
I use variant products with variables. and only the main product appears on the listing page
Anyone with an idea for a solution.
I think this is a BUG

[jonbendtsen]

Is the variant module enabled?

(mine is not because I do not use this functionality)

[umigun]

Of course, if the options are not activated, this menu will not appear.

Screenshot

[umigun]

I replaced the list.php files of the closest version. and the problem was solved. but this is clearly a “BUG”
The error is caused by expressions and variables in list.php. as seen in the picture below.

[jonbendtsen]

@umigun

Of course, if the options are not activated, this menu will not appear.

Screenshot by Lightshot

Okay, I didn’t know because I don’t use that functionality

[jonbendtsen]

@umigun

I replaced the list.php files of the closest version. and the problem was solved. but this is clearly a “BUG”
The error is caused by expressions and variables in list.php. as seen in the picture below.

which version were they from? and does it make sense to submit a Pull Request on github?