To reproduce:
1. Open attached project

Actual: CopyCPUParticleToNewParticle shader doesn't compile and errors are thrown in console:

Compute Shader compiler: internal error compiling shader platform=14: Protocol error - failed to read correct magic number

Compute Shader compiler: internal error compiling shader platform=15: Protocol error - failed to read correct magic number

Shader error in 'CopyCPUParticleToNewParticle.compute': Internal error communicating with the compute shader compiler process

Reproducible: 5.5.1p2, 5.6.0b8

Workaround: To activate the workaround just change the #if 0 to 1 in the compute shader at the top of the text file.