Fatal error: Uncaught Error: [] operator not supported for strings

[psdtohtmlguru]

Hi guys, while using bbPress plugin i have found a issue. I've seen that it was fixed a couple of months ago, but i'm not sure if it was 100% fixed.

This is the error:
Fatal error: Uncaught Error: [] operator not supported for strings in /Applications/MAMP/htdocs/wp-content/plugins/bbpress/includes/forums/functions.php:1800 Stack trace: #0 /Applications/MAMP/htdocs/wp-includes/class-wp-hook.php(298): bbp_pre_get_posts_normalize_forum_visibility(Object(WP_Query)) #1 /Applications/MAMP/htdocs/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(, Array) #2 /Applications/MAMP/htdocs/wp-includes/plugin.php(515): WP_Hook->do_action(Array) #3 /Applications/MAMP/htdocs/wp-includes/class-wp-query.php(1681): do_action_ref_array('pre_get_posts', Array) #4 /Applications/MAMP/htdocs/wp-includes/class-wp-query.php(3238): WP_Query->get_posts() #5 /Applications/MAMP/htdocs/wp-includes/class-wp.php(617): WP_Query->query(Array) #6 /Applications/MAMP/htdocs/wp-includes/class-wp.php(735): WP->query_posts() #7 /Applications/MAMP/htdocswp-includes/functions in /Applications/MAMP/htdocs/wp-content/plugins/bbpress/includes/forums/functions.php on line 1800

The error appears when accessing the Forums CPT on dashboard.

Theme used: Twenty Seventeen
No other plugins

Setup:
macOS
PHP7.1.1

The problem is not on PHP 7.0.15

[netweb]

Hi @psdtohtmlguru, welcome to Trac and thanks for the report :)

This has already fixed in [6135], see #3031.

[psdtohtmlguru]

@netweb I know about that ticket, but i'm using the version bbPress v2.5.12 and i still got the issue.

[netweb]

@psdtohtmlguru It will ship as part of bbPress 2.6, this should be very soon :)

[uscore713]

Could you please give us some idea of when this fix will be released? As it stands now, v2.5.12 is essentially unusable with PHP 7.1.

Would it be possible to provide a code snippet we could use to fix our installation in the meantime?