introduce unhandled liquid exception

check arity

lib/liquid/block_body.rb

@@ -93,10 +93,10 @@ module Liquid
         rescue MemoryError => e
           raise e
         rescue UndefinedVariable, UndefinedDropMethod, UndefinedFilter => e
-          context.handle_error(e, token.line_number)
+          context.handle_error(e, token.line_number, token.raw)
           output << nil
         rescue ::StandardError => e
-          output << context.handle_error(e, token.line_number)
+          output << context.handle_error(e, token.line_number, token.raw)
         end
       end
 

lib/liquid/context.rb

@@ -73,7 +73,7 @@ module Liquid
       @interrupts.pop
     end
 
-    def handle_error(e, line_number = nil)
+    def handle_error(e, line_number = nil, raw_token = nil)
       if e.is_a?(Liquid::Error)
         e.template_name ||= template_name
         e.line_number ||= line_number
@@ -82,7 +82,9 @@ module Liquid
       output = nil
 
       if exception_handler
-        result = exception_handler.call(e)
+        args = [e]
+        args << { line_number: line_number, raw_token: raw_token } if exception_handler.arity == 2
+        result = exception_handler.call(*args)
         case result
         when Exception
           e = result