Major - P3 To illustrate the case, it is sufficient to pass an empty BSON as a command to mongoc_client_command_simple():
src/mongoc/mongoc-cluster.c:183 mongoc_cluster_run_command_internal(): precondition failed: command_name Aborted
When something is appended to the command, the issue is gone. See the example below:
#include <stdio.h> #include <mongoc.h> int main() { mongoc_client_t *client; bson_t command, reply; bson_error_t error; bool status; mongoc_init(); client = mongoc_client_new("mongodb://127.0.0.1"); BSON_ASSERT(client); bson_init(&command); // BSON_APPEND_BOOL(&command, "a", 1); // Issue is gone when uncommented status = mongoc_client_command_simple(client, "test", &command, 0, &reply, &error); if (!status) printf("Error: %s\n", error.message); bson_destroy(&command); bson_destroy(&reply); mongoc_client_destroy(client); mongoc_cleanup(); return 0; }