bug fix

src/snn_utils.jl

@@ -422,12 +422,15 @@ function neuroplasticity!(n::outputNeuron, firedNeurons::Vector,
     # add new synaptic connection to neuron
     for (i, connIndex) in enumerate(zeroWeightConnIndex)
         newConn::Int64 = 0
-        try
+        if length(nFiredPool) != 0
             newConn = popfirst!(nFiredPool)
-        catch
+        elseif length(nNonFiredPool) != 0
             newConn = popfirst!(nNonFiredPool)
+        else
+            # skip
         end
 
+        if newConn != 0
             """ conn that is being replaced has to go into nNonFiredPool so nNonFiredPool isn't empty
             """
             push!(nNonFiredPool, n.subscriptionList[connIndex])
@@ -436,6 +439,7 @@ function neuroplasticity!(n::outputNeuron, firedNeurons::Vector,
             n.synapticStrength[connIndex] = synapticStrength[i]
         end
     end
+end