Fix tmp_path crash when skipping from fixture

src/_pytest/tmpdir.py

@@ -5,11 +5,15 @@ import sys
 import tempfile
 from pathlib import Path
 from shutil import rmtree
+from typing import Dict
 from typing import Generator
 from typing import Optional
 from typing import TYPE_CHECKING
 from typing import Union
 
+from _pytest.nodes import Item
+from _pytest.stash import StashKey
+
 if TYPE_CHECKING:
     from typing_extensions import Literal
 
@@ -33,6 +37,8 @@ from _pytest.fixtures import fixture
 from _pytest.fixtures import FixtureRequest
 from _pytest.monkeypatch import MonkeyPatch
 
+tmppath_result_key = StashKey[Dict[str, bool]]()
+
 
 @final
 @attr.s(init=False)
@@ -273,11 +279,16 @@ def tmp_path(
     # Remove the tmpdir if the policy is "failed" and the test passed.
     tmp_path_factory: TempPathFactory = request.session.config._tmp_path_factory  # type: ignore
     policy = tmp_path_factory._retention_policy
-    if policy == "failed" and request.node._tmp_path_result_call.passed:
+    result_dict = request.node.stash[tmppath_result_key]
+
+    # "call" might be skipped so check if it exists first
+    if "call" not in result_dict or (policy == "failed" and result_dict["call"]):
         # We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
         # permissions, etc, in which case we ignore it.
         rmtree(path, ignore_errors=True)
 
+    del request.node.stash[tmppath_result_key]
+
     # remove dead symlink
     basetemp = tmp_path_factory._basetemp
     if basetemp is None:
@@ -306,7 +317,11 @@ def pytest_sessionfinish(session, exitstatus: Union[int, ExitCode]):
 
 
 @hookimpl(tryfirst=True, hookwrapper=True)
-def pytest_runtest_makereport(item, call):
+def pytest_runtest_makereport(item: Item, call):
     outcome = yield
     result = outcome.get_result()
-    setattr(item, "_tmp_path_result_" + result.when, result)
+
+    if tmppath_result_key not in item.stash:
+        item.stash[tmppath_result_key] = {result.when: result.passed}
+    else:
+        item.stash[tmppath_result_key][result.when] = result.passed

testing/test_tmpdir.py

@@ -12,6 +12,7 @@ import attr
 import pytest
 from _pytest import pathlib
 from _pytest.config import Config
+from _pytest.config import ExitCode
 from _pytest.monkeypatch import MonkeyPatch
 from _pytest.pathlib import cleanup_numbered_dir
 from _pytest.pathlib import create_cleanup_lock
@@ -139,6 +140,24 @@ class TestConfigTmpPath:
             # Check the base dir itself is gone
             assert len(list(base_dir)) == 0
 
+    # issue #10502
+    def test_delete_dir_when_skipped_from_fixture(self, pytester: Pytester) -> None:
+        p = pytester.makepyfile(
+            """
+            import pytest
+
+            @pytest.fixture
+            def fixt(tmp_path):
+                pytest.skip()
+
+            def test_fixt(fixt):
+                pass
+        """
+        )
+
+        reprec = pytester.inline_run(p)
+        assert reprec.ret == ExitCode.OK
+
 
 testdata = [
     ("mypath", True),