arangodb/lib/valgrind.supp

{
   ignore errors caused by realloc(PTR,0)
   Memcheck:Leak
   fun:malloc
   fun:realloc
   fun:ev_realloc
   ...
}

{
   Protcol Buffers
   Memcheck:Leak
   ...
   fun:_ZN6google8protobuf14DescriptorPool24InternalAddGeneratedFileEPKvi
   ...
}