Fix #5451: Produce a score of 0 for fatal errors

ChangeLog

@@ -38,6 +38,11 @@ Release date: TBA
 * The ``PyLinter`` class will now be initialiazed with a ``TextReporter``
   as its reporter if none is provided.
 
+* Fatal errors now emit a score of 0.0 regardless if the linted module
+  contained any statements.
+
+  Closes #5451
+
 * Fix false positive - Allow unpacking of ``self`` in a subclass of ``typing.NamedTuple``.
 
   Closes #5312

doc/whatsnew/2.13.rst

@@ -59,5 +59,10 @@ Other Changes
 
   Closes #5065
 
-* The ``PyLinter`` class will now be initialiazed with a ``TextReporter``
+* Fatal errors now emit a score of 0.0 regardless if the linted module
+  contained any statements.
+
+  Closes #5451
+
+* The ``PyLinter`` class will now be initialized with a ``TextReporter``
   as its reporter if none is provided.

pylint/lint/pylinter.py

@@ -764,7 +764,7 @@ def enable_fail_on_messages(self):
                         self.enable(msg.msgid)
                         self.fail_on_symbols.append(msg.symbol)
                     elif msg.msgid[0] in fail_on_cats:
-                        # message starts with a cateogry value, flag (but do not enable) it
+                        # message starts with a category value, flag (but do not enable) it
                         self.fail_on_symbols.append(msg.symbol)
 
     def any_fail_on_issues(self):
@@ -1326,6 +1326,8 @@ def _report_evaluation(self):
         except Exception as ex:  # pylint: disable=broad-except
             msg = f"An exception occurred while rating: {ex}"
         else:
+            if self.stats.by_msg.get("fatal", 0):
+                note = 0.0
             self.stats.global_note = note
             msg = f"Your code has been rated at {note:.2f}/10"
             if previous_stats:

tests/test_self.py

@@ -1154,6 +1154,14 @@ def test_fail_on_exit_code(self, args, expected):
         # and errors that are generated they don't affect the exit code.
         self._runtest([path, "--fail-under=-10"] + args, code=expected)
 
+    def test_one_module_fatal_error(self):
+        """
+        Fatal errors in one of several modules linted still exits non-zero.
+        """
+        valid_path = join(HERE, "conftest.py")
+        invalid_path = join(HERE, "garbagePath.py")
+        self._runtest([valid_path, invalid_path], code=1)
+
     @pytest.mark.parametrize(
         "args, expected",
         [