Hi, Richard,
Clicking on the warning itself reveals:
line 27134 of sqlite3.c:
if( MAX(e2,0)+(i64)precision+(i64)width > etBUFSIZE - 15 ){
Clicking on "Expanding this definition of MAX":
line 218 of /usr/include/sys/param.h (MacOS 10.13):
#define MAX(a,b) (((a)>(b))?(a):(b))
Clicking on the line: "Other definition of MAX":
line 13457 of sqlite3.c:
# define MAX(A,B) ((A)>(B)?(A):(B))