bug#62823: 29.0.60; Fixing a small leak in tree-sitter search functions

[Yuan Fu]

> On Apr 13, 2023, at 11:45 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Thu, 13 Apr 2023 15:48:43 -0700
>> 
>> When we switch to using cursors instead of nodes [1] in treesit.c for
>> search functions, we introduced a small leak: the search functions
>> allows the user to pass a predicate function, which can signal. And
>> because we are now using cursors, which needs to be freed, everytime the
>> predicate function signals, the cursor is leaked.
>> 
>> I pushed a fix to master (a5eb9f6ad4e), the change is relatively
>> straightforward so I hope we can pick it into the next pretest.
> 
> Thanks, but this kind of bugs should be fixed on the release branch to
> begin with (I've backported it now).  If you are unsure on which
> branch to install such changes, please ask before installing.

Oops. I’ll do that the next time.

Yuan