glfwGetFrameBufferSize crashes program with access violation - c++

Question

I've been tryna write a renderer using BGFX, and I've set up a method to get the window width, and height - from my window class that wraps GLFWwindow*;
Here is window.h:
#ifndef WINDOW_H
#define WINDOW_H
#include <types.h>
#include <string>
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
class RenderWindow {
public:
bool Init(u16 _width, u16 _height, std::string _title);
bool IsCloseRequested() const;
void* GetNativeWindow();
u16 GetHeight();
u16 GetWidth();
void Refresh() const;
GLFWwindow* GlfwWindowPointer = nullptr;
};
#endif
And here is window.cpp
#include "window.h"
#ifdef _WIN32
#define GLFW_EXPOSE_NATIVE_WIN32
#elif __APPLE__
#define GLFW_EXPOSE_NATIVE_COCOA
#endif
#include <GLFW/glfw3native.h>
#include <iostream>
#include <cstdlib>
bool RenderWindow::Init(u16 _width, u16 _height, std::string _title) {
glfwInit();
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
this->GlfwWindowPointer = glfwCreateWindow(_width, _height, _title.c_str(), nullptr, nullptr);
if(this->GlfwWindowPointer == nullptr) {
std::cout << "[OS] [Window] [FATAL] Window creation failed, exiting" << std::endl;
std::exit(10);
}
return true;
}
bool RenderWindow::IsCloseRequested() const {
return glfwWindowShouldClose(this->GlfwWindowPointer);
}
void RenderWindow::Refresh() const {
glfwPollEvents();
}
u16 RenderWindow::GetHeight() {
int w = 0, h = 0;
glfwGetFramebufferSize(&(*GlfwWindowPointer), &w, &h); // ERROR HAPPENS HERE
return h;
}
u16 RenderWindow::GetWidth() {
int w = 0, h = 0;
glfwGetFramebufferSize(&(*GlfwWindowPointer), &w, &h); // ERROR HAPPENS HERE TOO
return w;
}
void* RenderWindow::GetNativeWindow() {
#ifdef _WIN32
return glfwGetWin32Window(this->GlfwWindowPointer);
#elif __APPLE__
return glfwGetCocoaWindow(this->GlfwWindowPointer);
#endif
}
The thing is, whenever I call these methods - the program crashes in vs debugger with the message:
Exception thrown: read access violation.
window was 0xF242340000.
Of course, the address changes every time - but you get the point. Without calling these two functions, my window works effortlessly. I even got bgfx to clear the screen to purple. Please help me.