refactor: use placebos instead of non-existent attributes

Details of the problem and thought process:
https://nedbatchelder.com/blog/202302/late_initialization_with_mypy.html

1 files changed, 6 insertions, 2 deletions

diff --git a/coverage/debug.py b/coverage/debug.py
index 12233959..d56a66bb 100644
--- a/coverage/debug.py
+++ b/coverage/debug.py
@@ -105,9 +105,13 @@ class DebugControlString(DebugControl):
         return cast(str, self.raw_output.getvalue())        # type: ignore
 
 
-class NoDebugging:
+class NoDebugging(DebugControl):
     """A replacement for DebugControl that will never try to do anything."""
-    def should(self, option: str) -> bool:      # pylint: disable=unused-argument
+    def __init__(self) -> None:
+        # pylint: disable=super-init-not-called
+        ...
+
+    def should(self, option: str) -> bool:
         """Should we write debug messages?  Never."""
         return False