How to reproduce the bug ?

  Step 1: create a C source file
/************* a.c ********************/
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <stdio.h>
#include <assert.h>

int main() {
    EGLint major, minor;
    EGLDisplay disp;
    disp = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    assert(disp != EGL_NO_DISPLAY);    
    EGLBoolean b = eglInitialize(disp, &major, &minor);
    assert(b != EGL_FALSE);
    EGLConfig config;
    EGLint numConfigs;
    EGLint attribs[] = {
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
        EGL_RED_SIZE, 1,         
        EGL_GREEN_SIZE, 1,       
        EGL_BLUE_SIZE, 1,        
        EGL_NONE                 
    };
    b = eglChooseConfig(disp, attribs, &config, 1, &numConfigs);
    assert(b != EGL_FALSE);
    assert(numConfigs > 0);
    return 0;
}

  Step 2: compile it and run it
   gcc a.c -lEGL -lGLESv2 -Wall
   ./a.out
  We will see the error message:
    a.out: a.c:25: main: Assertion `numConfigs > 0' failed.

What should be the correct output ?
  No error.

Environment:
Linux 3.2.0-24-generic x86_64
Ubuntu 12.04 64 bit latest
Mesa 8.1-devel (git-529476b) latest code from git
Intel Sandybridge Mobile Graphic card