I use libcurl for FTP works and it works fine but if left idle for some time it just crashes. Here is the backtrace which despite reading it for some time I cannot make sense of what is wrong. The trace does not show where in my functions crash originates and so am left orphan here by debugger. I use threads if that add value Compiler is GCC 4.7 on Linux
0 0x00007fff8e09b524 addbyter /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 914
1 0x00007fff8e09a32f dprintf_formatf /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 572
2 0x00007fff8e09b5a4 curl_mvsnprintf /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 932
3 0x00007fff8e089510 Curl_failf /home/stefano/Desktop/myproject/curl-7.33.0/lib/sendf.c 152
4 0x00007fff8e07dbf4 Curl_resolv_timeout /home/stefano/Desktop/myproject/curl-7.33.0/lib/hostip.c 618
5 0x00007fff78012bf8 ??
6 0x000000c300000016 ??
7 0x00007fff8e0d3604 ??
8 0x0000000000000002 ??
9 0x00000000001b7740 ??
10 0x0000000000000000 ??
UPDATE 1 Run it again under debugger and met a crash at the line
FILE *fd;
fd = fopen(files[i].c_str(), "rb"); //<---here goes the crash!
files[i].c_str() is supposed to give const* char from wxString The new BT is
0 0x00007fff8e08952a Curl_failf /home/stefano/Desktop/myproject/curl-7.33.0/lib/sendf.c 154
1 0x00007fff8e07dbf4 Curl_resolv_timeout /home/stefano/Desktop/myproject/curl-7.33.0/lib/hostip.c 618
2 0x00007fff780158c8 ??
3 0x00000000001b7730 ??
4 0x00007fff78009808 ??
5 0x00007fff78015e79 ??
6 0x00007fff78009808 ??
7 0x00007fff8c8a04a0 ??
8 0x00007fff8e0c84ca ftp_multi_statemach /home/stefano/Desktop/myproject/curl-7.33.0/lib/ftp.c 3113