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Normals in Cycles contain NaN
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System Information
Windows 10
GeForce GTX 850M

Blender Version
Broken: 2.79 aa844ad676d (2018-09-12)
Worked: 2.79b

There are NaN normals in the newest version as shown in the attached image. The top image normals is 2.79b, the one at the bottom is from the broken version. The NaN normals are circled in red.

Exact steps for others to reproduce the error
Extract the zip file and render the blend file with the working and broken versions.

An OpenEXR folder with the rendered normals for both versions is also provided. "Master" is the broken and "Stable" is the working one.