compilation failure in CONNECT

storage/connect/tabfmt.cpp:419:24: error: '%.3d' directive writing between 3 and 10 bytes into a region of size 5 [-Werror=format-overflow=]
  419 |       sprintf(buf, "COL%.3d", i+1);

storage/connect/tabfmt.cpp

@@ -93,7 +93,7 @@ PQRYRES CSVColumns(PGLOBAL g, PCSZ dp, PTOS topt, bool info)
 	char    sep, q;
 	int     rc, mxr;
 	bool    hdr;
-  char   *p, *colname[MAXCOL], dechar, buf[8];
+  char   *p, *colname[MAXCOL], dechar, buf[16];
   int     i, imax, hmax, n, nerr, phase, blank, digit, dec, type;
   int     ncol = sizeof(buftyp) / sizeof(int);
   int     num_read = 0, num_max = 10000000;     // Statistics