Gentoo's Bugzilla –
Attachment 558160 Details for
Bug 673440=media-libs/osl-1.9.9[partio,abi_x86_32] - .../work/OpenShadingLanguage-Release-1.9.9/src/liboslexec/pointcloud.cpp:386:5: error: static assertion failed: Only will work if Partio ParticleIndex is the size of a size_t