Add test for current pyproject issuesinvalid-toml-config

1 files changed, 12 insertions, 3 deletions

diff --git a/pylint/utils/linterstats.py b/pylint/utils/linterstats.py
index f46054455..212aa6dc0 100644
--- a/pylint/utils/linterstats.py
+++ b/pylint/utils/linterstats.py
@@ -285,9 +285,18 @@ class LinterStats:
         increase: int,
     ) -> None:
         """Increase the message type count of an individual message type of a module"""
-        self.by_module[modname][type_name] = (
-            self.by_module[modname][type_name] + increase
-        )
+        if self.by_module.get(modname, None) is None:
+            self.by_module[modname] = ModuleStats(
+                convention=0,
+                error=0,
+                fatal=0,
+                info=0,
+                refactor=0,
+                statement=0,
+                warning=0,
+            )
+        module_stat = self.by_module[modname][type_name]
+        self.by_module[modname][type_name] = module_stat + increase
 
     def reset_message_count(self) -> None:
         """Resets the message type count of the stats object"""