BUG #18770: The function 'packGraph ' causes a memory leak.

The following bug has been logged on the website:

Bug reference:      18770
Logged by:          fengyao
Email address:      2365868844@qq.com
PostgreSQL version: 17.2
Operating system:   linux
Description:

Hello, 

In line 1965 of the trgm_regexp.c file

1965:    arcs = (TrgmPackArcInfo *)
1966:        palloc(sizeof(TrgmPackArcInfo) * trgmNFA->arcsCount);

The memory requested 'arcs' was not freed.

Have a good day!