Building failure on MacOS 11.3.1 with Connect engine

CONNECT engine:

/git/10.2/storage/connect/jsonudf.cpp:5946:19: error: address of array 'g->Message' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]

                PUSH_WARNING(g->Message ? g->Message : "Unexpected error");

                             ~~~^~~~~~~ ~

/git/10.2/storage/connect/jsonudf.cpp:24:86: note: expanded from macro 'PUSH_WARNING'

#define PUSH_WARNING(M) push_warning(current_thd, Sql_condition::WARN_LEVEL_WARN, 0, M)

                                                                                     ^

/git/10.2/storage/connect/jsonudf.cpp:6074:10: error: address of array 'g->Message' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]

                if (g->Message)

                ~~  ~~~^~~~~~~

/git/10.2/storage/connect/jsonudf.cpp:6010:7: error: variable 'fout' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]

                if (!(fin = global_fopen(g, msgid, fn, "rt")))

                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/git/10.2/storage/connect/jsonudf.cpp:6068:7: note: uninitialized use occurs here

                if (fout) fclose(fout);

                    ^~~~

/git/10.2/storage/connect/jsonudf.cpp:6010:3: note: remove the 'if' if its condition is always false

                if (!(fin = global_fopen(g, msgid, fn, "rt")))

                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/git/10.2/storage/connect/jsonudf.cpp:6007:13: note: initialize the variable 'fout' to silence this warning

                FILE *fout;

                          ^

                           = NULL

3 errors generated.

make[2]: *** [storage/connect/CMakeFiles/connect.dir/jsonudf.cpp.o] Error 1

make[1]: *** [storage/connect/CMakeFiles/connect.dir/all] Error 2