How to debug regression test binary pg_regress in postgreSQL?

I tried to debug pg_regress in postgreSQL using lldb on mac. However, when I run pg_regress using lldb, the test failed and reported: "failed to wait for subprocesses: Interrupted system call"

I customized a test schedule file which only has one test SQL. When I execute make check, the regression test passed.

Below is the output when debugging with lldb through Clion:

============== removing existing temp instance        ==============
============== creating temporary instance            ==============
============== initializing database system           ==============
============== starting postmaster                    ==============
running on port 60848 with PID 16262
============== creating database "regression"         ==============
CREATE DATABASE
ALTER DATABASE
============== running regression test queries        ==============
test some_test               ... failed to wait for subprocesses: Interrupted system call

Process finished with exit code 2

Expected result should be

============== removing existing temp instance        ==============
============== creating temporary instance            ==============
============== initializing database system           ==============
============== starting postmaster                    ==============
running on port 60848 with PID 16262
============== creating database "regression"         ==============
CREATE DATABASE
ALTER DATABASE
============== running regression test queries        ==============
test some_test               ... ok