[libvirt] question about virConnectGetAllDomainStats and virTypedParameter

I'm try to implement virConnectGetAllDomainStats for php binding api, but have one issue with VIR_TYPED_PARAM_STRING: code part: retval = virConnectGetAllDomainStats(conn->conn, stats, &retstats, flags); for (i=0; i < retval; i++) { zval *arr2; ALLOC_INIT_ZVAL(arr2); array_init(arr2); for (j = 0; j < retstats[i]->nparams; j++) { params = retstats[i]->params[j]; switch (params.type) { case VIR_TYPED_PARAM_INT: add_assoc_long(arr2, params.field, params.value.i); case VIR_TYPED_PARAM_UINT: add_assoc_long(arr2, params.field, params.value.ui); case VIR_TYPED_PARAM_LLONG: add_assoc_long(arr2, params.field, params.value.l); case VIR_TYPED_PARAM_ULLONG: add_assoc_long(arr2, params.field, params.value.ul); case VIR_TYPED_PARAM_DOUBLE: add_assoc_double(arr2, params.field, params.value.d); case VIR_TYPED_PARAM_BOOLEAN: add_assoc_bool(arr2, params.field, params.value.b); case VIR_TYPED_PARAM_STRING: add_assoc_string_ex(arr2, params.field, strlen(params.field)+1, strdup(params.value.s), strlen(params.value.s)+1); // SEGFAULT HAPPENING } } gdb shows: return_value_used=<optimized out>) at libvirt-php.c:2505 arr2 = 0x7ffff7fd72b8 conn = <optimized out> zconn = 0x7ffff7fd7140 retval = <optimized out> flags = <optimized out> stats = <optimized out> name = <optimized out> i = <optimized out> j = <optimized out> params = {field = "state.state", '\000' <repeats 68 times>, type = 1, value = {i = 5, ui = 5, l = 5, ul = 5, d = 2.4703282292062327e-323, b = 5 '\005', s = 0x5 <Address 0x5 out of bounds>}} retstats = 0x101d870 What i'm doing wrong? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru