Repro steps:
1) Open the project
2) Select VisualizeReceiver.shader
3) Compile it only on OpenGLCore and make sure it's not skipping unused shader_features
4) Notice the errors in console:

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Shader compiler: internal error compiling shader snippet type=0 platform=15: Protocol error - failed to read correct magic number
Shader compiler: internal error compiling shader snippet type=0 platform=15: Protocol error - failed to read correct magic number
UnityEditor.DockArea:OnGUI()
Shader error in 'FastShadowReceiver/Projector/Visualize Receiver': Internal error communicating with the shader compiler process
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Reproduced in: 5.4.0b4; 5.3.2p1;5.2.3p2