src/misc/json.c: In function ‘json_parse_string’:
src/misc/json.c:119:31: error: pointer ‘r’ used after ‘free’ [-Werror=use-after-free]
  119 |                   *failp = (a - r) + start;
      |                            ~~~^~~~
src/misc/json.c:117:19: note: call to ‘free’ here
  117 |                   free(r);
      |                   ^~~~~~~
cc1: all warnings being treated as errors
make: *** [Makefile:643: /home/gary/tvheadend/src/tvheadend-4.2.8/build.linux/src/misc/json.o] Error 1
==> ERROR: A failure occurred in build().
    Aborting...