Isolate the smallest size that fails on merge sort.
Isolate the smallest size that fails on merge sort.

--HG--
extra : convert_revision : svn%3A83215879-3e5a-4751-8c9d-778f44bb06a5/trunk%40781

thvasilo/thrust,arnabgho/thrust,marksantos/thrust,egaburov/thrust,xiongzhanblake/thrust,sarvex/thrust,zeryx/thrust,arnabgho/thrust,zeryx/thrust,thvasilo/thrust,raygit/thrust,GrimDerp/thrust,dachziegel/thrust,jaredhoberock/thrust,zhenglaizhang/thrust,thrust/thrust,xiongzhanblake/thrust_src,sdalton1/thrust,jaredhoberock/thrust,egaburov/thrust,thvasilo/thrust,mohamed-ali/thrust,jaredhoberock/thrust,jaredhoberock/thrust,andrewcorrigan/thrust-multi-permutation-iterator,zeryx/thrust,marksantos/thrust,zhenglaizhang/thrust,dachziegel/thrust,jaredhoberock/thrust,marksantos/thrust,raygit/thrust,mohamed-ali/thrust,mohamed-ali/thrust,egaburov/thrust,raygit/thrust,andrewcorrigan/thrust-multi-permutation-iterator,thrust/thrust,arnabgho/thrust,GrimDerp/thrust,sdalton1/thrust,xiongzhanblake/thrust,zhenglaizhang/thrust,xiongzhanblake/thrust_src,xiongzhanblake/thrust,Ricardo666666/thrust,sarvex/thrust,thrust/thrust,thrust/thrust,sdalton1/thrust,Ricardo666666/thrust,dachziegel/thrust,GrimDerp/thrust,Ricardo666666/thrust,xiongzhanblake/thrust_src,sarvex/thrust,thrust/thrust,andrewcorrigan/thrust-multi-permutation-iterator