Syntax with curly braces is deprecated in lessc.php

[xillibit]

Steps to reproduce the issue

When a component use the library /libraries/vendor/leafo/lessphp/lessc.inc.php on Php 7.4.x, there are this kind of errors :

Deprecated: Array and string offset access syntax with curly braces is deprecated in [APACHE2.4.X-DATA-PATH]/libraries/vendor/leafo/lessphp/lessc.inc.php on line 749

Deprecated: Array and string offset access syntax with curly braces is deprecated in [APACHE2.4.X-DATA-PATH]/libraries/vendor/leafo/lessphp/lessc.inc.php on line 1860

Deprecated: Array and string offset access syntax with curly braces is deprecated in [APACHE2.4.X-DATA-PATH]/libraries/vendor/leafo/lessphp/lessc.inc.php on line 2519

Deprecated: Array and string offset access syntax with curly braces is deprecated in [APACHE2.4.X-DATA-PATH]/libraries/vendor/leafo/lessphp/lessc.inc.php on line 2573

Expected result

No errors

Actual result

Errors showed above

System information (as much as possible)

Php 7.4.x
Joomla! 3.9 and 3.10

Additional comments

[brianteeman]

This is a vendor supplied library and we are using the latest release. So it can't be solved in Joomla but would have to be solved upstream.

[ReLater]

Just BTW...
leafo/lessphp is dead since years. leafo/lessphp#543
oyejorge/less.php , too. oyejorge/less.php#371

[ReLater]

Addition: And the issue reported here is not the only one concerning leafo/lessphp. There are many many others.

[xillibit]

so in this case i close this issue