Program exited with code -11 when calling

[Anthony]

On Wednesday, 1 July 2020 at 05:47:16 UTC, Anthony wrote:
> On Wednesday, 1 July 2020 at 05:33:48 UTC, H. S. Teoh wrote:
>> On Wed, Jul 01, 2020 at 05:04:28AM +0000, Anthony via 
>> Digitalmars-d-learn wrote: [...]
>>> auto str_utf8 = str.toUTF8();
>>> bson_error_t error
>>> 
>>> auto bson = bson_new_from_json(cast(const 
>>> uint8_t*)str_utf8.ptr, -1,
>>> &error);
>>> 
>>> 
>>> I get a "Program exited with code -11" message.
>>> Does anyone know what I'm doing wrong?
>>
>> D strings are generally not null-terminated (except for 
>> literals). Before passing them to a C function you need to add 
>> a trailing null. Try using std.conv.toStringz instead of 
>> casting the pointer yourself.
>>
>>
>> T
>
> Thanks H. S. Teoh.
> Hmm, still same result though.
>
>
>     import std.string;
>
>     auto str = toStringz("{\"a\":1}");
>
>     bson_error_t error;
>
>     bson_new_from_json(str, -1, &error);
>
>
>
>
>     extern(C) {
>         ...
>         bson_t* bson_new_from_json(const char* data, long len, 
> bson_error_t* error);
>     }

Noob mistake:
I declared an array that should be of fixed size.

     struct bson_error_t {
         ....
         char[] message;
     };

Should be:

     struct bson_error_t {
         ....
         char[504] message;
     };

:/