[crash] Fix crashes on python interpreter < 3.9 (#8163) (#8165)

github-actions[bot] · Pierre-Sassoulas · web-flow · commit 40f67116e484 · 2023-02-02T10:49:57.000+01:00
Closes #8161 Co-authored-by: Marc Schmitzer <marc@solute.de> (cherry picked from commit 4689b19) Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>
diff --git a/doc/whatsnew/fragments/8161.bugfix b/doc/whatsnew/fragments/8161.bugfix
@@ -0,0 +1,3 @@
+Fix a crash happening for python interpreter < 3.9 following a failed typing update.
+
+Closes #8161
diff --git a/pylint/checkers/imports.py b/pylint/checkers/imports.py
@@ -176,7 +176,7 @@ def _make_tree_defs(mod_files_list: ItemsView[str, set[str]]) -> _ImportTree:
             assert isinstance(node[0], dict)
             node = node[0].setdefault(prefix, ({}, []))  # type: ignore[arg-type,assignment]
         assert isinstance(node[1], list)
-        node[1] += files
+        node[1].extend(files)
     return tree_defs
 
 

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+Fix a crash happening for python interpreter < 3.9 following a failed typing update.`
	`2`	`+`
	`3`	`+Closes #8161`