QImage::fill() causes a SIGSEGV for images with format QImage::Format_RGB32

The following two lines of code cause a SIGSEGV:

QImage Image(QSize(1280, 960), QImage::Format_RGB32);
Image.fill(4);

Reproducible: always
The code works fine on Qt 4.6.3

The attachements contain a stacktrace and the variables in qt_memfill32_sse2() at the time of the SIGSEGV. The instruction pointer points to the following line:
const __m128i value128 = _mm_set_epi32(value, value, value, value);
The error does not occur if I use QImage::Format_Indexed8