don't do gradients for cyclic code

2016-06-07 14:29:49 +01:00 · 2016-06-07 14:29:49 +01:00 · 3b38b8696d
commit 3b38b8696d
parent d5b3b156ae
1 changed files with 1 additions and 0 deletions
--- a/src/compiler/diff.jl
+++ b/src/compiler/diff.jl
@ -14,6 +14,7 @@ function ∇v(v::Vertex, Δ)
 end

 function invert(v::IVertex, Δ, out = d())
+  @assert !iscyclic(v)
  if isconstant(v)
    @assert !haskey(out, value(v))
    out[value(v)] = il(Δ)