Scenegraph/Graph example: error when trying to launch the example

tasundqv@IT-D-2VFR5W1:~/tmp/qt5/5.1.1-rc1/gcc/examples/quick/scenegraph/graph$ ./graph 
QOpenGLShader::compile(Fragment): 0:59(1): error: syntax error, unexpected INTCONSTANT, expecting $end

*** Problematic Fragment shader source code ***
#define lowp
#define mediump
#define highp


uniform sampler2D texture;
uniform lowp float qt_Opacity;
uniform lowp vec4 color;

varying highp vec2 vTexCoord;
varying lowp vec2 vShadeCoord;

#define PI 3.14159265359

void main()
{
    lowp float shade = texture2D(texture, vTexCoord).r * 0.05 - length(vec2(0.5, 0.4) - vShadeCoord) * 0.3;
    lowp vec4 c = vec4(color.xyz + shade, color.w);
    gl_FragColor = c * qt_Opacity;
}
5Graph 
***
QSGSimpleMaterialShader does not implement 'uniform lowp float qt_Opacity' in its fragment shader
Aborted (core dumped)