SQLite shared cache READONLY error

#include "sqlite3.h"

#include <stdio.h>

void init_db()
{
  sqlite3* db;
  sqlite3_open_v2("test.db", &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0);
  sqlite3_exec(db, "CREATE TABLE test (a INTEGER);", 0, 0, 0);
  sqlite3_close(db);
}

void handle_result(const char* tag, int result)
{
  if (result != SQLITE_OK)
    printf("%s - %d\n", tag, result);
}

void insert(sqlite3* db)
{
  int result = sqlite3_exec(db, "INSERT INTO test VALUES (42);", 0, 0, 0);
  handle_result("insert", result);
}

void select(sqlite3* db)
{
  int result = sqlite3_exec(db, "SELECT * FROM test;", 0, 0, 0);
  handle_result("select", result);
}

int main()
{
  sqlite3_enable_shared_cache(1);
  init_db();

  sqlite3* dbRead;
  sqlite3_open_v2("test.db", &dbRead, SQLITE_OPEN_READONLY, 0);

  sqlite3* dbWrite;
  sqlite3_open_v2("test.db", &dbWrite, SQLITE_OPEN_READWRITE, 0);

  select(dbRead);
  insert(dbWrite);

  sqlite3_close(dbRead);
  sqlite3_close(dbWrite);
}