Mysterious CTD on method call.

When this method gets called:

void CduLineItem::ClearItem()
{
    m_Text = L"";

    return; // Inserted for debuging

    //m_isBoxed = false;
    //m_TextSize.Width = 0;
    //m_TextSize.Height = 0;
}

It crashes on the attempt to set m_Text.

This is the header:

#pragma once

#include <string>
#include <windows.h>
#include <gdiplus.h>

using namespace std;
using namespace Gdiplus;

class CduLineItem
{
public:
            CduLineItem();
    void ClearItem();
    void SetAlignment(StringAlignment align);
    StringFormat GetAlignment();
    void SetColor(SolidBrush* brush);
    SolidBrush* GetColorPtr();
    void SetFont(Font* font);
    Font* GetFontPtr();

    wstring m_Text; // Text
    RectF m_RectF; // Rect

private:
    bool m_isBoxed; // Display with box
    SizeF m_TextSize; // Size to box
    Font *m_pFont; // Font
    StringFormat m_StrFormat; // Alignment
    SolidBrush *m_pColor; // Color
};

And I am mystified as to why this is causing a crash. If I just return
without doing anything in the function it doesn't crash.