Fix corrupted output for backslash-continued imports with trailing semicolons

isort/parse.py

@@ -218,6 +218,19 @@ def _get_next_line() -> tuple[str, str | None]:
                     ):
                         nested_comments[stripped_line] = extra_line.comment
 
+            # If a semicolon was introduced by a backslash-continued line (i.e., the
+            # original statement had no semicolon but the merged import_string does),
+            # treat the entire multi-line construct as non-import code and output as-is.
+            # This mirrors what skip_line() does for single-line semicolons.
+            # Note: statement_index was set to `index` *after* its increment at the top
+            # of the outer while loop, so statement_index - 1 is the index of the first
+            # line of this statement in in_lines.
+            import_string_code = import_string.split("#")[0]
+            statement_code = statement.split("#")[0]
+            if ";" in import_string_code and ";" not in statement_code:
+                out_lines.extend(in_lines[statement_index - 1 : index])
+                continue
+
             if type_of_import == "from":
                 import_string = normalize_from_import_string(import_string)
                 if "import " not in import_string:

tests/unit/test_regressions.py

@@ -1985,3 +1985,16 @@ def test_comment_on_opening_line_of_aliased_import_does_not_move():
         isort.code(short_line, profile="black")
         == "from mod import attr as alias  # type: ignore[attr-defined]  # My comment\n"
     )
+
+
+def test_semicolon_after_backslash_continuation_not_corrupted():
+    """Ensure isort doesn't corrupt imports when a backslash-continued line ends with a
+    semicolon followed by additional code, e.g.:
+
+        from os import \\
+            name; print(name)
+
+    See: https://github.com/PyCQA/isort/issues/2417
+    """
+    test_input = "from os import \\\n    name; print(name)\n"
+    assert isort.code(test_input) == test_input