Fix double-edge issue when passes the same rest args twice

lib/typeprof/core/env/method.rb

@@ -50,7 +50,7 @@ def get_rest_args(genv, start_rest, end_rest)
           a_arg.each_type do |ty|
             ty = ty.base_type(genv)
             if ty.is_a?(Type::Instance) && ty.mod == genv.mod_ary && ty.args[0]
-              vtxs << ty.args[0]
+              vtxs << ty.args[0].new_vertex(genv, self)
             else
               "???"
             end

lib/typeprof/core/graph/vertex.rb

@@ -141,6 +141,7 @@ def initialize(origin)
       when AST::Node
       when RBS::AST::Declarations::Base
       when ValueEntity
+      when ActualArguments
       else
         raise "unknown class: #{ origin.class }"
       end

scenario/args/splat-twice.rb

@@ -0,0 +1,18 @@
+## update
+class Foo
+  def gen
+    [1]
+  end
+
+  def check
+    ary = []
+    ary.append(*gen)
+    ary.append(*gen)
+  end
+end
+
+## assert
+class Foo
+  def gen: -> [Integer]
+  def check: -> Array[Integer]
+end