Fix a crash in parallel mode when the module's filepath is not set

Close #3564

Author: PCManticore

ChangeLog

@@ -4,6 +4,7 @@ Pylint's ChangeLog
 
 What's New in Pylint 2.6.0?
 ===========================
+
 Release date: TBA
 
 * bad-continuation and bad-whitespace have been removed, black or another formatter can help you with this better than Pylint
@@ -34,6 +35,10 @@ Release date: TBA
 
 * Fix `pre-commit` config that could lead to undetected duplicate lines of code
 
+* Fix a crash in parallel mode when the module's filepath is not set
+
+  Close #3564
+
 
 What's New in Pylint 2.5.4?
 ===========================
@@ -42,6 +47,10 @@ What's New in Pylint 2.5.4?
 
   Close #3690
 
+* Fix a crash in parallel mode when the module's filepath is not set
+
+  Close #3564
+
 
 What's New in Pylint 2.5.3?
 ===========================

pylint/lint/check_parallel.py

@@ -71,6 +71,7 @@ def _worker_check_single_file(file_item):
     msgs = [_get_new_args(m) for m in _worker_linter.reporter.messages]
     return (
         _worker_linter.current_name,
+        filepath,
         _worker_linter.file_state.base_name,
         msgs,
         _worker_linter.stats,
@@ -98,11 +99,16 @@ def check_parallel(linter, jobs, files, arguments=None):
 
         all_stats = []
 
-        for module, base_name, messages, stats, msg_status in pool.imap_unordered(
-            _worker_check_single_file, files
-        ):
+        for (
+            module,
+            file_path,
+            base_name,
+            messages,
+            stats,
+            msg_status,
+        ) in pool.imap_unordered(_worker_check_single_file, files):
             linter.file_state.base_name = base_name
-            linter.set_current_module(module)
+            linter.set_current_module(module, file_path)
             for msg in messages:
                 msg = Message(*msg)
                 linter.reporter.handle_message(msg)

tests/regrtest_data/regression_missing_init_3564/subdirectory/file.py

@@ -791,3 +791,11 @@ def test_duplicate_code_raw_strings(self):
             [path, "--disable=all", "--enable=duplicate-code"],
             expected_output=expected_output,
         )
+
+    def test_regression_parallel_mode_without_filepath(self):
+        # Test that parallel mode properly passes filepath
+        # https://github.com/PyCQA/pylint/issues/3564
+        path = join(
+            HERE, "regrtest_data", "regression_missing_init_3564", "subdirectory/"
+        )
+        self._test_output([path, "-j2"], expected_output="No such file or directory")