Building with GCC 9.1.1, I see these: ``` src/test/test_addr.c: In function ‘test_addr_parse’: src/test/test_addr.c:1167:1: note: variable tracking size limit exceeded with ‘-fvar-tracking-assignments’, retrying without 1167 | test_addr_parse(void *arg) | ^~~~~~~~~~~~~~~ ``` This seems to be new in 0.4.2.