Fix UnicodeDecodeError.object inferred as str instead of bytes (#…

…2358) (#2373) (cherry picked from commit 73afab5) Co-authored-by: JulianJvn <[email protected]>
pylint-dev · Feb 4, 2024 · 3e16c95 · 3e16c95
1 parent 80a556d
commit 3e16c95
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Showing 3 changed files with 9 additions and 3 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -13,6 +13,11 @@ What's New in astroid 3.0.3?
 ============================
 Release date: TBA
 
+
+* Fix type of ``UnicodeDecodeError.object`` inferred as ``str`` instead of ``bytes``.
+
+  Closes pylint-dev/pylint#9342
+
 * Fix ``no-member`` false positives for ``args`` and ``kwargs`` on ``ParamSpec`` under Python 3.12.
 
   Closes pylint-dev/pylint#9401

diff --git a/astroid/interpreter/objectmodel.py b/astroid/interpreter/objectmodel.py
@@ -818,7 +818,7 @@ def attr_path(self):
 class UnicodeDecodeErrorInstanceModel(ExceptionInstanceModel):
     @property
     def attr_object(self):
-        return node_classes.Const("")
+        return node_classes.Const(b"")
 
 
 BUILTIN_EXCEPTIONS = {

diff --git a/tests/test_object_model.py b/tests/test_object_model.py
@@ -742,13 +742,14 @@ def test_oserror(self) -> None:
     def test_unicodedecodeerror(self) -> None:
         code = """
         try:
-            raise UnicodeDecodeError("utf-8", "blob", 0, 1, "reason")
+            raise UnicodeDecodeError("utf-8", b"blob", 0, 1, "reason")
         except UnicodeDecodeError as error:
-            error.object[:1] #@
+            error.object #@
         """
         node = builder.extract_node(code)
         inferred = next(node.infer())
         assert isinstance(inferred, astroid.Const)
+        assert inferred.value == b""
 
     def test_import_error(self) -> None:
         ast_nodes = builder.extract_node(