use invokelatest in libuv getaddrinfo callback

Author: stevengj

base/socket.jl

@@ -584,18 +584,18 @@ function uv_getaddrinfocb(req::Ptr{Void}, status::Cint, addrinfo::Ptr{Void})
     cb = unsafe_pointer_to_objref(data)::Function
     pop!(callback_dict,cb) # using pop forces an error if cb not in callback_dict
     if status != 0 || addrinfo == C_NULL
-        cb(UVError("uv_getaddrinfocb received an unexpected status code", status))
+        invokelatest(cb, UVError("uv_getaddrinfocb received an unexpected status code", status))
     else
         freeaddrinfo = addrinfo
         while addrinfo != C_NULL
             sockaddr = ccall(:jl_sockaddr_from_addrinfo, Ptr{Void}, (Ptr{Void},), addrinfo)
             if ccall(:jl_sockaddr_is_ip4, Int32, (Ptr{Void},), sockaddr) == 1
-                cb(IPv4(ntoh(ccall(:jl_sockaddr_host4, UInt32, (Ptr{Void},), sockaddr))))
+                invokelatest(cb, IPv4(ntoh(ccall(:jl_sockaddr_host4, UInt32, (Ptr{Void},), sockaddr))))
                 break
             #elseif ccall(:jl_sockaddr_is_ip6, Int32, (Ptr{Void},), sockaddr) == 1
             #    host = Array{UInt128}(1)
             #    scope_id = ccall(:jl_sockaddr_host6, UInt32, (Ptr{Void}, Ptr{UInt128}), sockaddr, host)
-            #    cb(IPv6(ntoh(host[1])))
+            #    invokelatest(cb, IPv6(ntoh(host[1])))
             #    break
             end
             addrinfo = ccall(:jl_next_from_addrinfo, Ptr{Void}, (Ptr{Void},), addrinfo)