Update: bug is caused by a newline in the hdr_entry.value for the Content-Length header field (i.e. the value contains the numerical value with a surplus trailing newline). Around line 937 in src/modules/proxy/proxy_ftp.c, this code propagates the trailing newline to the "size" variable (from ftp_getrc_msg), which is later copied to the header value field: else if (i == 213) { /* Size command ok */ size = resp;
Quick & dirty fix: Add: if (size[strlen(size)-1]=='\n') size[strlen(size)-1]='\0'; (at the following line).