Fix a crash when processing templates with variable arguments (#1641)

src/Generator/Passes/MatchParamNamesWithInstantiatedFromPass.cs

@@ -1,4 +1,5 @@
 using CppSharp.AST;
+using System;
 
 namespace CppSharp.Passes
 {
@@ -18,8 +19,8 @@ namespace CppSharp.Passes
                 (function.Namespace is ClassTemplateSpecialization specialization &&
                  specialization.SpecializationKind == TemplateSpecializationKind.ExplicitSpecialization))
                 return false;
-
+            int parameters = Math.Min(function.Parameters.Count, function.InstantiatedFrom.Parameters.Count);
-            for (int i = 0; i < function.Parameters.Count; i++)
+            for (int i = 0; i < parameters; i++)
                 function.InstantiatedFrom.Parameters[i].Name = function.Parameters[i].Name;
 
             return true;

tests/CSharp/CSharpTemplates.h

@@ -842,3 +842,12 @@ private:
 
 class SpecializationOfClassWithNonTypeTemplateArgument : public ClassWithNonTypeTemplateArgument<0>
 { };
+template<std::size_t N>
+class DLL_API FloatArrayF
+{
+public:
+    template<typename... V, class = typename std::enable_if_t<sizeof...(V) == N>>
+    FloatArrayF(V... x)  { }
+
+};
+const FloatArrayF<6> I6{ 1., 1., 1., 0., 0., 0. };