Make split() deterministic across architectures

Author: penelopeysm

Project.toml

@@ -1,7 +1,7 @@
 name = "AdvancedPS"
 uuid = "576499cb-2369-40b2-a588-c64705576edc"
 authors = ["TuringLang"]
-version = "0.6"
+version = "0.6.1"
 
 [deps]
 AbstractMCMC = "80f14c24-f653-4e6a-9b94-39d6b0f70001"

src/rng.jl

@@ -36,8 +36,10 @@ Base.rand(rng::TracedRNG, ::Type{T}) where {T} = Base.rand(rng.rng, T)
 Split `key` into `n` new keys
 """
 function split(key::Integer, n::Integer=1)
-    T = typeof(key) # Make sure the type of `key` is consistent on W32 and W64 systems.
-    return T[hash(key, i) for i in UInt(1):UInt(n)]
+    T = typeof(key)
+    inner_rng = Random.MersenneTwister(key)
+    retval = rand(inner_rng, T, n)
+    return retval
 end
 
 """