gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
"""@glsl_fragment_shader.to_cstring)
-glIsShader fragment_shader
+glCompileShader fragment_shader
assert fragment_shader.is_compiled else print "Fragment shader compilation failed with: {glGetShaderInfoLog(fragment_shader)}"
assert glGetError == gl_NO_ERROR