ID 274679 - Blinkscript example for rolling a Kernel has an error in line 90

Problem summary
Blinkscript example for rolling a Kernel has an error in line 90

Customer reported version
nuke.10.0v5

Customer reported platform
centos6

Steps to reproduce
1. Open Nuke
2. Read in footage
3. Create Blinkscript node
4. Copy and paste the example code in the following link (https://www.thefoundry.co.uk/products/nuke/developers/105/blinkreference/image_rolling_kernels.html#rolling_kernel_example) into the Kernel Source
5. Save the Kernel File
6. Recompile
7. In Kernel Parameters turn off 'Use GPU if able'
8. View Blinkscript node
Result: Horizontal lines across the image 

Workaround
Modify line 90 from:
sum += src(radius) - src(radius - 1);

to:
sum += src(radius) - src(-radius - 1);

Reproduced by support
10.5v3 - OSX 10.11.6

Expected behaviour
Example to work without issue

Actual behaviour
Horizontal lines appeared across the image