Ubuntu 14.04 and graphics card Intel HD 4600 Graphics
Broken: (example: 2.77a abf6f08
Short description of error
The bug deals with the RGB Curves suppressing the lens flare AFTER the Alpha Over node.
The concept in the node tree is to color correct the ship object which is off screen at this time. Based on the RGB Curves location in the node tree the expectation is that the color correction would be limited to the ship object. However if you un-mute the RGB Curves node You will see that it also gets applied to the image coming in from the Add node. I have observed this behaviour also in the Brightness/Contrast node. That however does not seem to show up in this composite tree if I put the Brightness/Contrast node in the tree in place of the RGB Curves.
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps