I can no longer assign char[M][N] types into a std::vector on gcc 4.9

I was using gcc 4.8 until I upgraded Ubuntu, now I have gcc-4.9.1-16. Code which used to compile without warnings and run fine now no longer compiles.

static const unsigned WIDTH = 16;
static const unsigned VSCALE = 1;
static const unsigned HEIGHT = WIDTH / VSCALE;
static const unsigned FOOTER = 2;

typedef char Row [WIDTH + 1];
typedef Row World [HEIGHT - FOOTER];

std :: vector <World> m_levels;

World levels [] =
{
    {
        "                ",
        "                ",
        "                ",
        "                ",
        "                ",
        "  ###      ###  ",
        "                ",
        "1122112211221122",
        " 33003300330033 ",
        "1122112211221122",
        " 33003300330033 ",
        "                ",
        "                ",
        "                "
    },
    {
        "       44       ",
        "     555 55     ",
        "    66    66    ",
        "  777      777  ",
        " 66          66 ",
        "  777      777  ",
        "    66#  #66    ",
        "  777 #  # 777  ",
        " 66   #  #   66 ",
        "  777 #  # 777  ",
        "    66#  #66    ",
        "     555 55     ",
        "       44       ",
        "                "
    }
};

// The next line is line 68
m_levels .assign (std :: begin (levels), std :: end (levels));

The final line errors with

.../foo.cpp:68:62: required from here /usr/include/c++/4.9/bits/stl_algobase.h:373:4: error: static assertion failed: type is not assignable

.../foo.cpp:68:62: required from here /usr/include/c++/4.9/bits/stl_construct.h:75:7: error: parenthesized initializer in array new [-fpermissive]

The compile options have not changed, they are -W -Wall -Wextra -Werror -pedantic --std=c++0x as far as I can tell only gcc has changed.

Why does this code no longer compile?