Created attachment 93994 [details]
screenshot

http://www.ozone3d.net/gpu_caps_viewer/

GPU Caps Viewer has several OpenGL demos. one of the demo is GL 2.1 - Vertex Displacement Mapping, which is used run fine with Mesa 10 stable but now regressed in mesa master.

the program can be run by wine.

All the demos emitting the following in the terminal:

Mesa 10.2.0-devel implementation error: meta program compile failed:
0:6(12): error: value of type vec3 cannot be assigned to variable of type vec4

source:
attribute vec2 position;
attribute vec3 textureCoords;
varying vec4 texCoords;
void main()
{
   texCoords = textureCoords;
   gl_Position = vec4(position, 0.0, 1.0);
}


Please report at https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa

attached image showing black dots(glitch) in the rendering

Tested On:

Ubuntu 13.10
Linux 3.12 (both 32 and 64 bit)
X.Org X Server 1.14.5
xf86-video-intel 2.99.905
Mesa-git 18caef953f2de134077bfa6e46f8616f68ff1b1b

Hardware: Intel GMA 4500 MHD (device id 2a42)