diff --git a/doc/bugs/test_fail_on_windows__58___permission_denied_/comment_1_9f46a99e5f570de2313a5521b58640b3._comment b/doc/bugs/test_fail_on_windows__58___permission_denied_/comment_1_9f46a99e5f570de2313a5521b58640b3._comment
new file mode 100644
index 0000000000..7c9f574816
--- /dev/null
+++ b/doc/bugs/test_fail_on_windows__58___permission_denied_/comment_1_9f46a99e5f570de2313a5521b58640b3._comment
@@ -0,0 +1,78 @@
+[[!comment format=mdwn
+ username="jkniiv@b330fc3a602d36a37a67b2a2d99d4bed3bb653cb"
+ nickname="jkniiv"
+ avatar="http://cdn.libravatar.org/avatar/419f2eee8b0c37256488fabcc2737ff2"
+ subject="comment 1"
+ date="2021-08-31T20:47:24Z"
+ content="""
+At my end I ran the `readonly` test with the `--keep-failures` flags and found out the following:
+
+[[!format sh \"\"\"
+jkniiv@AINESIS MINGW64 /c/annx
+$ ./git-annex test -p \"Unit Tests v8 adjusted unlocked branch.readonly\" --keep-failures
+Tests
+  Unit Tests v8 adjusted unlocked branch
+    readonly: Init Tests
+  init: OK (4.00s)
+  add:  OK (5.78s)
+
+All 2 tests passed (9.77s)
+** Preserving repo for failure analysis in .t\tmprepo1
+** Preserving repo for failure analysis in .t\tmprepo0
+FAIL (16.98s)
+      .\\Test\\Framework.hs:57:
+      drop vs readonly repo failed (transcript follows)
+      drop foo
+      failed
+      git-annex: .git\annex\objects\6cd\e82\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77: DeleteFile \"\\\\?\\C:\\annx\\.t\\tmprepo1\\.git\\annex\\objects\\6cd\\e82\\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77\\SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77\": permission denied (Käyttö estetty.)
+      drop: 1 failed
+
+1 out of 1 tests failed (26.78s)
+  (Failures above could be due to a bug in git-annex, or an incompatibility
+   with utilities, such as git, installed on this system.)
+
+jkniiv@AINESIS MINGW64 /c/annx
+$ cd .t/tmprepo1
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ ls -ld .git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+drwxr-xr-x 1 jkniiv 197121 0 Aug 31 23:08 .git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ ls -ld .git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+-r--r--r-- 1 jkniiv 197121 20 Aug 31 23:08 .git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ chmod -Rv +w .git/annex/objects
+mode of '.git/annex/objects' retained as 0755 (rwxr-xr-x)
+mode of '.git/annex/objects/6cd' retained as 0755 (rwxr-xr-x)
+mode of '.git/annex/objects/6cd/e82' retained as 0755 (rwxr-xr-x)
+mode of '.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77' retained as 0755 (rwxr-xr-x)
+mode of '.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77' changed from 0444 (r--r--r--) to 0644 (rw-r--r--)
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ ../../git-annex drop foo
+drop foo ok
+(recording state in git...)
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ ls -ld ../tmprepo0/.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+drwxr-xr-x 1 jkniiv 197121 0 Aug 31 23:15 ../tmprepo0/.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/
+
+jkniiv@AINESIS MINGW64 /c/annx/.t/tmprepo1 (adjusted/master(unlocked))
+$ ls -ld ../tmprepo0/.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+-r--r--r-- 1 jkniiv 197121 20 Aug 31 23:07 ../tmprepo0/.git/annex/objects/6cd/e82/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77/SHA256E-s20--e394a389d787383843decc5d3d99b6d184ffa5fddeec23b911f9ee7fc8b9ea77
+
+\"\"\"]]
+
+So it looks like the readonly status of the annex object got copied between r1 (`tmprepo0`) and r2
+(`temprepo1`) at the point of `get` and that prevented the removal of the file during `drop`.
+
+(Btw. I found out that in Msys2/MinGW what is represented as the POSIX readonly mode bits seems
+to be really represented by the readonly file attribute and not as readonly permissions/ACLs
+on the file. At least that seems to be the default setting. Cygwin on the other hand defaults
+to mapping mode bits to ACLs in a rather complex fashion. All of this are just some details
+that lie behind what calling out to an external `chmod` binary entails on Windows both above
+in my Git Bash session and in git-annex' unit test `test_readonly`.)
+
+"""]]