[crash] Fix crashes on python interpreter < 3.9

Closes pylint-dev#8161
Pierre-Sassoulas · Feb 2, 2023 · d991cf5 · d991cf5
1 parent 5c0084b
commit d991cf5
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diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
@@ -601,3 +601,4 @@ under this name, or we did not manage to find their commits in the history.
 - Thomas Snowden: fix missing-docstring for inner functions
 - Wolfgang Grafen
 - Yannick Brehon
+- Marc Schmitzer (MarcSchmitzer): #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