fix

Author: CarloLucibello

GNNGraphs/test/test_utils.jl

@@ -1,6 +1,12 @@
 using ChainRulesTestUtils, FiniteDifferences, Zygote, Adapt, CUDA
 CUDA.allowscalar(false)
 
+# Using this until https://github.com/JuliaDiff/FiniteDifferences.jl/issues/188 is fixed
+function FiniteDifferences.to_vec(x::Integer)
+    Integer_from_vec(v) = x
+    return Int[x], Integer_from_vec
+end
+
 function ngradient(f, x...)
     fdm = central_fdm(5, 1)
     return FiniteDifferences.grad(fdm, f, x...)