When linking a program that consists of a FS from the following code the call to glLinkProgram crashes with a NULL pointer exception:
#version 450
uniform int umsch;//umschalten
layout(binding = 0) uniform sampler2D FarbTextur;
in vec2 ausgTexKoord;
layout(location = 0) out vec4 Helligkeit;
void main( void ){
float test_ft;
float asdf;
do {
if( ausgTexKoord.x < 0.0f || ausgTexKoord.y < 0.0f )
test_ft = 1.0;
} while(false);
if(umsch == 1){
test_ft = asdf;
}
Helligkeit = vec4(test_ft);
test_ft = texture( FarbTextur, ausgTexKoord ).x;
}
The code looks pretty random and that's because it is. I have tried to remove as much from it while still triggering the exception and that's what I end up with.
Note that both, the VS and the FS compile without problems and I check that by calling glGetShaderiv with the GL_COMPILE_STATUS argument. Also attaching the compiled Shaders to the program works fine. But when I call glLinkProgram on said program the (C++) application crashes with a NULL pointer exception.
I have tested on an RX 480 with the latest drivers. It says Driver Packaging Version is 16.50.2011-161223a-310015C and OpenGL Driver version 6.14.10.13464 and my OS is Windows 7 64 bit.
I have attached a zip file with a Visual C++ 2010 project and the following relevant files:
- Quelle1.cpp
- Shader/test.frag
- Shader/test.vert
Can someone confirm this behaviour?
