Fix #6362 (deepcopy broken for SharedArrays)

base/sharedarray.jl

@@ -120,6 +120,14 @@ convert(::Type{SharedArray}, A::Array) = (S = SharedArray(eltype(A), size(A)); c
 convert{T}(::Type{SharedArray{T}}, A::Array) = (S = SharedArray(T, size(A)); copy!(S, A))
 convert{TS,TA,N}(::Type{SharedArray{TS,N}}, A::Array{TA,N}) = (S = SharedArray(TS, size(A)); copy!(S, A))
 
+function deepcopy_internal(S::SharedArray, stackdict::ObjectIdDict)
+    haskey(stackdict, S) && return stackdict[S]
+    # Note: copy can be used here because SharedArrays are restricted to isbits types
+    R = copy(S)
+    stackdict[S] = R
+    return R
+end
+
 function range_1dim(S::SharedArray, pidx)
     l = length(S)
     nw = length(S.pids)

test/parallel.jl

@@ -87,6 +87,16 @@ for p in procs(d)
     @test d[idxl] == p 
 end
 
+# issue #6362
+d = Base.shmem_rand(dims)
+s = copy(sdata(d))
+ds = deepcopy(d)
+@test ds == d
+remotecall_fetch(findfirst(id->(id != myid()), procs(ds)), setindex!, ds, 1.0, 1:10)
+@test ds != d
+@test s == d
+
+
 # SharedArray as an array
 # Since the data in d will depend on the nprocs, just test that these operations work
 a = d[1:5]