fixup! debug: test_basic/StubSession

Author: blueyed

testing/test_assertrewrite.py

@@ -1264,7 +1264,9 @@ class StubSession:
 
             def isinitpath(self, p: "py.path.local") -> bool:
                 ret = p in self._initialpaths
-                print("StubSession.isinitpath:", p, self._initialpaths, "=>", ret)
+                print("StubSession.isinitpath:", p, type(p), self._initialpaths, "=>", ret)
+                print(os.fspath(p))
+                __import__("traceback").print_stack(file=sys.stdout)
                 return ret
 
         def spy_find_spec(name, path):
@@ -1297,6 +1299,7 @@ def fix(): return 1
         self.initial_paths.add(foobar_path)
         print("foobar_path", foobar_path, hash(foobar_path))
         print("hashes", [hash(x) for x in self.initial_paths])
+        print("fspaths", [os.fspath(x) for x in self.initial_paths])
         assert foobar_path in self.initial_paths
 
         # # conftest files should always be rewritten