growth_factor    6311 src/fileio.c   	    verify (BUF_BYTES_MAX <= EMACS_INT_MAX / growth_factor);
growth_factor    6319 src/fileio.c   		&& (growth_factor * (BUF_Z (b) - BUF_BEG (b))
growth_factor    6320 src/fileio.c   		    < (growth_factor - 1) * XFIXNUM (BVAR (b, save_length)))