Hello/Hi,

While I was making a new scene with POVRay, I found (by sheer luck) something
weird, with the following scene:

#version 3.7;

global_settings{ assumed_gamma 1.0 }

background{ color srgb 1 }

camera{
    location < 1, 1, -2 >
    look_at <0, 0.5, 0>
}

light_source{ < 1, 2, -3 > * 1000000 color srgb 1 }

#box{< 0, 0, 0>, < 1, 7/47, 1 > pigment{ color srgb < 1, 1, 0> } }

//End of file

In this .pov file you can notice there's that '#box' keyword that doesn't
prevent the POVRay parser from making a new image (I can see a yellow box in a
white background). Before I report that bug , I wondrered if there was a
preprocessor keyword in the Scene Description Language which name is box, but I
didn't find anything in google or qwant. The above scene has been tested with
povray 3.7.0.8 unofficial and povray 3.8.0 alpha unofficial both compiled with
g++-9.2.0. The end line type of the scene file is CRLF and working renders were
done with "Lubuntu 19.10 eoan ermine".

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