X-Git-Url: http://nitlanguage.org

diff --git a/src/semantize/typing.nit b/src/semantize/typing.nit
index 932256f..1d694e6 100644
--- a/src/semantize/typing.nit
+++ b/src/semantize/typing.nit
@@ -266,8 +266,13 @@ private class TypeVisitor
 
 		#debug("recv: {recvtype} (aka {unsafe_type})")
 		if recvtype isa MNullType then
-			self.error(node, "Error: Method '{name}' call on 'null'.")
-			return null
+			# `null` only accepts some methods of object.
+			if name == "==" or name == "!=" or name == "is_same_instance" then
+				unsafe_type = mmodule.object_type.as_nullable
+			else
+				self.error(node, "Error: Method '{name}' call on 'null'.")
+				return null
+			end
 		end
 
 		var mproperty = self.try_get_mproperty_by_name2(node, unsafe_type, name)