BUG: Removed references to nullptr.
BUG: Removed references to nullptr.

Former-commit-id: fd92f15b4e7154c812358b1693e7e9100fa1f288
3upperm2n/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,gtcasl/gpuocelot,3upperm2n/gpuocelot,gtcasl/gpuocelot,gtcasl/gpuocelot