NullReferenceException when trying to default-initialize array argument

[yeputons]

The following code saved to x.ci:

public static class Test
{
    public static void Run(int[]# arr = new int[10]) {
    }
}

produces the following error when running cito x.ci -o x.py compiled from 5e518d3:

Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
   at Foxoft.Ci.GenBase.Visit(CiPrefixExpr expr, CiPriority parent) in F:\cito\GenBase.cs:line 840
   at Foxoft.Ci.GenPySwift.Visit(CiPrefixExpr expr, CiPriority parent) in F:\cito\GenPySwift.cs:line 112
   at Foxoft.Ci.GenPy.Visit(CiPrefixExpr expr, CiPriority parent) in F:\cito\GenPy.cs:line 254
   at Foxoft.Ci.CiPrefixExpr.Accept(CiVisitor visitor, CiPriority parent) in F:\cito\CiTree.cs:line 435
   at Foxoft.Ci.GenBase.WriteCoercedInternal(CiType type, CiExpr expr, CiPriority parent) in F:\cito\GenBase.cs:line 612
   at Foxoft.Ci.GenBase.WriteCoerced(CiType type, CiExpr expr, CiPriority parent) in F:\cito\GenBase.cs:line 633
   at Foxoft.Ci.GenBase.WriteCoercedExpr(CiType type, CiExpr expr) in F:\cito\GenBase.cs:line 754
   at Foxoft.Ci.GenBase.WriteVarInit(CiNamedValue def) in F:\cito\GenBase.cs:line 765
   at Foxoft.Ci.GenBase.WriteParameters(CiMethod method, Boolean first, Boolean defaultArguments) in F:\cito\GenBase.cs:line 1340
   at Foxoft.Ci.GenPy.Write(CiMethod method) in F:\cito\GenPy.cs:line 1075
   at Foxoft.Ci.GenPy.Write(CiClass klass) in F:\cito\GenPy.cs:line 1118
   at Foxoft.Ci.GenPy.Write(CiProgram program) in F:\cito\GenPy.cs:line 1158
   at Foxoft.Ci.CiTo.Main(String[] args) in F:\cito\CiTo.cs:line 155

Context: I was trying to see how Python's mutable default arguments are handled.

[pfusik]

Error checking is citos weak point. :)