Issue #8833: tarfile created hard link entries with a size

field != 0 by mistake. The associated testcase did not
expose this bug because it was broken too.

1 files changed, 5 insertions, 1 deletions

diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index 52d6ab3a88..0d58cdacff 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -662,10 +662,14 @@ class WriteTest(WriteTestBase):
         if hasattr(os, "link"):
             link = os.path.join(TEMPDIR, "link")
             target = os.path.join(TEMPDIR, "link_target")
-            open(target, "wb").close()
+            fobj = open(target, "wb")
+            fobj.write("aaa")
+            fobj.close()
             os.link(target, link)
             try:
                 tar = tarfile.open(tmpname, self.mode)
+                # Record the link target in the inodes list.
+                tar.gettarinfo(target)
                 tarinfo = tar.gettarinfo(link)
                 self.assertEqual(tarinfo.size, 0)
             finally: