C++ gsoap memory leaks in my computer

Question

I use gsoap client in C++ program, but it has memory leaks when calling the defined functions many times. The main codes are:

for(int i=0;i<1000000;i++){
    struct soap* s = soap_new();
    char* run;
    soap_call_ns__run(s,url,NULL,"123",&run);
    soap_destroy(s);
    soap_end(s);
    soap_done(s);
    soap_free(s);
}

when running, the memory will rise up; I run this on Win7 system; I try it on ubuntu 16.10 and it seems there's no memory leaks.

Can anyone try it and help me ?