Since we have already added the `invite_as` field to models, we can now
replace usage of `invite_as_admin` properly with its equivalent `invite_as
== PreregistrationUser.INVITE_AS['REALM_ADMIN']`.
Hence, also removed now redundant `invite_as`.
Note that a pretty common use case for this is a realm admin sending this to
everyone after an import from HipChat or Slack. So this adds the realm_name
to the title (so that there is something they might recognize) and kept the
wording generic enough to accommodate the user not having clicked anything
to get this email.
Also strengthens the tests a bit to better test the complicated template
logic.
This checks if push_notification_enabled() is set to false in
handle_push_notification and adds an early return statement.
This is a significant performance optimization for our unit tests
because the push notifications code path does a number of database
queries, and this migration means we don't end up doing those queries
the hundreds of times we send PMs or mentions in our tests where we're
not trying to test the push notifications functionality.
This should also have a small message sending scalability improvement
for any Zulip servers without push notifications enabled.
Tweaked by tabbott to fix a few small issues.
Fixes#10895.
Apparently, Django's get_current_site function (used, e.g., in
django-two-factor to look up the domain to use in QR codes) first
tries to use the Sites framework, and if unavailable, does the right
thing (namely, using request.get_host()).
We don't use the Sites framework for anything in Zulip, so the correct
fix is to just remove it.
Fixes#11014.
This styles the avatar and username that show when the registering
user is importing their settings from an existing Zulip account.
Tweaked by tabbott to fix the test/linter failures, a bit of styling,
and tag strings for translation.
This adds a function that sends provided email to all administrators
of a realm, but in a single email. As a result, send_email now takes
arguments to_user_ids and to_emails instead of to_user_id and
to_email.
We adjust other APIs to match, but note that send_future_email does
not yet support the multiple recipients model for good reasons.
Tweaked by tabbott to modify `manage.py deliver_email` to handle
backwards-compatibily for any ScheduledEmail objects already in the
database.
Fixes#10896.
This is largely inspired by requests from people not liking the
Google's new emojiset. A lot of people were requesting to revert
back to old blobs emojiset so we are re-enabling this feature
after making relevant infrastructure changes for supporting google's
old blob emojiset and re-adding support for twitter emojiset.
Fixes: #10158.
Also use name for selecting form in casper tests
as form with action=new is present in both /new
and /accounts/new/send_confirm/ which breaks
test in CircleCI as
waitWhileVisible('form[action^="/new/"]) never stops
waiting.
The function being tested here was kind of an
emergency response to some spam attacks. It
works for a pretty specific set of circumstances,
so it requires a lot of setup.
We may eliminate this function as we improve
our realm "plan types", and if that happens, we
can either eliminate this test or repurpose it.
We have code to prevent newbies on open realms
from inviting users. This is mostly intended
to hinder spammers. This commit just adds some
test coverage.
This uses the recently introduced active_mobile_push_notification
flag; messages that have had a mobile push notification sent will have
a removal push notification sent as soon as they are marked as read.
Note that this feature is behind a setting,
SEND_REMOVE_PUSH_NOTIFICATIONS, since the notification format is not
supported by the mobile apps yet, and we want to give a grace period
before we start sending notifications that appear as (null) to
clients. But the tracking logic to maintain the set of message IDs
with an active push notification runs unconditionally.
This is designed with at-least-once semantics; so mobile clients need
to handle the possibility that they receive duplicat requests to
remove a push notification.
We reuse the existing missedmessage_mobile_notifications queue
processor for the work, to avoid materially impacting the latency of
marking messages as read.
Fixes#7459, though we'll need to open a follow-up issue for
using these data on iOS.
Historically, queue_json_publish had a special third argument that was
basically its default mock behavior in the test suite. We've been
migrating away from that model, because it was confusing and resulted
in poor test coverage of our queue worker code paths; this was one of
the last holdouts.
As it turns out, we don't exercise this code path in a way that
impacts tests much; the main downside of this change is a likely small
penalty to performance of the full test suite when sending private
messages.
Since otp_encrypt_api_key only encrypts API keys, it doesn't require
access to the full UserProfile object to work properly. Now the
parameter it accepts is just the API key.
This is preparatory refactoring for removing the api_key field on
UserProfile.
This renames Realm.restricted_to_domain field to
emails_restricted_to_domains, for greater clarity as to what it does
just from seeing the setting name, without having to look it up.
Fixes part of #10042.
The only changes visible at the AST level, checked using
https://github.com/asottile/astpretty, are
zerver/lib/test_fixtures.py:
'\x1b\\[(1|0)m' ↦ '\\x1b\\[(1|0)m'
'\\[[X| ]\\] (\\d+_.+)\n' ↦ '\\[[X| ]\\] (\\d+_.+)\\n'
which is fine because re treats '\\x1b' and '\\n' the same way as
'\x1b' and '\n'.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Previously, if you had LDAPAuthBackend enabled, we basically blocked
any other auth backends from working at all, by requiring the user's
login flow include verifying the user's LDAP password.
We still want to enforce that in the case that the account email
matches LDAP_APPEND_DOMAIN, but there's a reasonable corner case:
Having effectively guest users from outside the LDAP domain.
We don't want to allow creating a Zulip-level password for a user
inside the LDAP domain, so we still verify the LDAP password in that
flow, but if the email is allowed to register (due to invite or
whatever) but is outside the LDAP domain for the organization, we
allow it to create an account and set a password.
For the moment, this solution only covers EmailAuthBackend. It's
likely that just extending the list of other backends we check for in
the new conditional on `email_auth_backend` would be correct, but we
haven't done any testing for those cases, and with auth code paths,
it's better to disallow than allow untested code paths.
Fixes#9422.
This is the analog of the last commit, for the password reset flow.
For these users, they should be managing/changing their password in
the LDAP server.
The error message for users doing the wrong thing here is nonexistent
isn't great, but it should be a rare situation.
This should significantly improve the user experience for creating
additional accounts on zulipchat.com.
Currently, disabled in production pending some work on visual styling.
Since this is a logged-out view, need to actually write code for the
case of deactivated realms.
The change to get_active_user is more for clarity; the Django password
reset form already checks for whether the user is active earlier.
This test class is basically a poor version of the end-to-end tests
that we have in `test_auth_backends.py`, and didn't really add any
value other than making it difficult to refactor.
In this commit we start to support redirects to urls supplied as a
'next' param for the following two backends:
* GoogleOAuth2 based backend.
* GitHubAuthBackend.
This makes this value much easier for a server admin to change than it
was when embedded directly in the code. (Note this entire mechanism
already only applies on a server open for anyone to create a realm.)
Doing this also means getting the default out of the database.
Instead, we make the column nullable, and when it's NULL in the
database, treat that as whatever the current default is. This better
matches anyway the likely model where there are a few realms with
specially-set values, and everything else should be treated uniformly.
The migration contains a `RenameField` step, which sounds scary
operationally -- but it really does mean just the *field*, in
the model within the Python code. The underlying column's name
doesn't change.
This changes the followup_day2 emails delay from one day later to two days
later if it is getting delivered on any working days(i.e. Mon - Fri).
For Thursday it is compromised to next day as it would be too late to
postponed to Monday and for Friday it should be Monday.
At last actually, emails should send one hour before the above calculated so
that user can catch them when they are dealing with these kinds of stuff.
Fixes: #7078.
This uses an actual query to the backend to check if the subdomain is
available, using the same logic we would use to check when the
subdomain is in fact created.
This is a little cleaner in that the try/except blocks for
SMTPException are a lot narrower; and it'll facilitate an upcoming
change to sometimes skip sending mail.
Commit d4ee3023 and its parent have the history behind this code.
Since d4ee3023^, all new PreregistrationUser objects, except those for
realm creation, have a non-None `realm`. Since d4ee3023, any legacy
PreregistrationUsers, with a `realm` of None despite not being for
realm creation, are treated as expired. Now, we ignore them
completely, and remove any that exist from the database.
The user-visible effect is to change the error message for
registration (or invitation) links created before d4ee3023^ to be
"link does not exist", rather than "link expired".
This change will at most affect users upgrading straight from 1.7 or
earlier to 1.8 (rather than from 1.7.1), but I think that's not much
of a concern (such installations are probably long-running
installations, without many live registration or invitation links).
[greg: tweaked commit message]
We should omit these for mypy. For most class definitions,
mypy doesn't need `Any`, and it provides no real useful info.
For clever monkeypatches, you should provide a more specific
type than `Any`.
The original logic is buggy now that emails can belong to (and be
invited to) multiple realms.
The new logic in the `invites` queue worker also avoids the bug where
when the PreregistrationUser was gone by the time the queue worker got
to the invite (e.g., because it'd been revoked), we threw an exception.
[greg: fix upgrade-compatibility logic; add test; explain
revoked-invite race above]
This code changes frequently enough that errors are bound to creep in. The
main change is that this sends the original invitation email instead of the
reminder email, but I think that's fine.
We'll need the expanded test coverage when we move
check_prereg_key_and_redirect to zerver/views/registration.py to avoid
test failures, and these are also tests we should really have anyway.
For example, this means that if a user already has an account on one
realm and they try to make an account on another by hitting "Sign in
with Google" (rather than following the little "Register" link to a
"Sign up with Google" button instead), they'll get to make an account
instead of getting an error.
Until very recently, if the user existed on another realm, any attempt
to register with that email address had to fail in the end, so this
logic gave the user a useful error message early. We introduced it in
c23aaa178 "GitHub: Show error on login page for wrong subdomain"
back in 2016-10 for that purpose. No longer! We now support reusing
an email on multiple realms, so we let the user proceed instead.
This function's interface is kind of confusing, but I believe when its
callers use it properly, `invalid_subdomain` should only ever be true
when `user_profile` is None -- in which case the revised
`invalid_subdomain` condition in this commit can never actually fire,
and the `invalid_subdomain` parameter no longer has any effect. (At
least some unit tests call this function improperly in that respect.)
I've kept this commit to a minimal change, but it would be a good
followup to go through the call sites, verify that, eliminate the use
of `invalid_subdomain`, then remove it from the function entirely.
[Modified by greg to (1) keep `USERNAME_FIELD = 'email'`,
(2) silence the corresponding system check, and (3) ban
reusing a system bot's email address, just like we do in
realm creation.]
As we migrate to allow reuse of the same email with multiple realms,
we need to replace the old "no email reuse" validators. Because
stealing the email for a system bot would be problematic, we still ban
doing so.
This commit only affects the realm creation logic, not registering an
account in an existing realm.
Just now this is largely redundant with `test_signup_already_active`;
but very soon when we allow reusing an email across realms, the logic
will diverge.
This completes the last commit's work to fix CVE-2017-0910, applying
to any invite links already created before the fix was deployed. With
this change, all new-user registrations must match an explicit realm
in the PreregistrationUser row, except when creating a new realm.
[greg: rewrote commit message]
We would allow a user with a valid invitation for one realm to use it
on a different realm instead. On a server with multiple realms, an
authorized user of one realm could use this (by sending invites to
other email addresses they control) to create accounts on other
realms. (CVE-2017-0910)
With this commit, when sending an invitation, we record the inviting
user's realm on the PreregistrationUser row; and when registering a
user, we check that the PregistrationUser realm matches the realm the
user is trying to register on. This resolves CVE-2017-0910 for
newly-sent invitations; the next commit completes the fix.
[greg: rewrote commit message]
Previously, this was a ValidationError, but that doesn't really make
sense, since this condition reflects an actual bug in the code.
Because this happened to be our only test coverage the ValidationError
catch on line 84 of registration.py, we add nocoverage there for now.
The installation admin is not the right person to get support requests from
deactivated users, regardless of the situation.
Also updates the wording to be a bit more concise.
This was basically rewritten by tabbott, because the code is a lot
cleaner after just rewriting the ZulipPasswordResetForm code to no
longer copy the model of the original Django version.
Fixes#4733.
This adds tests for a new more cases. Some were already covered
elsewhere in the codebase, but it feels best for LoginTest to fully
cover OurAuthenticationForm.
We don't have our linter checking test files due to ultra-long strings
that are often present in test output that we verify. But it's worth
at least cleaning out all the ultra-long def lines.
This change:
* Prevents weird potential attacks like taking a valid confirmation link
(say an unsubscribe link), and putting it into the URL of a multiuse
invite link. I don't know of any such attacks one could do right now, but
reasoning about it is complicated.
* Makes the code easier to read, and in the case of confirmation/views.py,
exposes something that needed refactoring anyway (USER_REGISTRATION and
INVITATION should have different endpoints, and both of those endpoints
should be in zerver/views/registration, not this file).
Because this is for tests, a heuristic like this that's right in most
situations is actually fine; we can override it in the few cases where
a test might set up a situation where it fails.
So just make it clear for the next reader that that's what's going on,
and also adjust the helper's interface slightly so that its callers
do have that flexibility.
Do you call get_recipient(Recipient.STREAM, stream_id) or
get_recipient(stream_id, Recipient.STREAM)? I could never
remember, and it was not very type safe, since both parameters
are integers.
The cookie mechanism only works when passing the login token to a
subdomain. URLs work across domains, which is why they're the
standard transport for SSO on the web. Switch to URLs.
Tweaked by tabbott to add a test for an expired token.
Most of these have more to do with authentication in general than with
registering a new account. `create_preregistration_user` could go
either way; we move it to `auth` so we can make the imports go only in
one direction.
Lets administrators view a list of open(unconfirmed) invitations and
resend or revoke a chosen invitation.
There are a few changes that we can expect for the future:
* It is currently possible to invite an email that you have already
invited, it might make sense to change this behavior.
* Resend currently sends an invite reminder instead of resending the
original invite, this is because 'custom_body' was not stored when
the first invite was sent.
Tweaked in various minor ways, primarily in the backend, by tabbott,
mostly for style consistency with the rest of the codebase.
Fixes: #1180.
Tweaked by tabbott to have the field before the invitation is
completed be called invite_as_admins, not invited_as_admins, for
readability.
Fixes#6834.
In do_send_messages, we only produce one dictionary for
the event queues, instead of different flavors for text
vs. html. This prevents two unnecessary queries to the
database.
It also means we only put one dictionary on the "message"
event queue instead of two, albeit a wider one that has
some values that won't be sent to the actual clients.
This wider dictionary from MessageDict.wide_dict is also
used for the `feedback_messages` queue and service bot
queues. Since the extra fields are possibly useful down
the road, and they'll just be ignored for now, we don't
bother to remove them. Also, those queue processors won't
have access to `content_type`, which they shouldn't need.
Fixes#6947
Every time we updated a UserProfile object, we were calling
delete_display_recipient_cache(), which churns the cache and
does an extra database hop to find subscriptions. This was
due to saying `updated_fields` instead of `update_fields`.
This made us prone to cache churn for fields like UserProfile.pointer
that are fairly volatile.
Now we use the helper function changed(). To prevent the
opposite problem, we use all the fields that could invalidate
the cache.
While our recent changing to hide /register means we don't need a nice
pretty error message here, eventually we'll want to clean up the error
message.
Fixes#7047.
Historically, we'd just use the default Django version of this
function. However, since we did the big subdomains migration, it's
now the case that we have to pass in the subdomain to authenticate
(i.e. there's no longer a fallback to just looking up the user by
email).
This fixes a problem with user creation in an LDAP realm, because
previously, the user creation flow would just pass in the username and
password (after validating the subdomain).
I think an hour after signup is not the right time to try to get someone to
re-engage with a product.
This also makes the day1 email clearly a transactional email both in
experiencing the product and in the eyes of various anti-spam laws, and
allows us to remove the unsubscribe link.
This modifies the realm creation form to (1) support a
realm_in_root_domain flag and (2) clearly check whether the root
domain is available inside check_subdomain_available before trying to
create a realm with it; this should avoid IntegrityErrors.
We were doing an unnecessary database query on every user registration
checking the availability of the user's subdomain, when in fact this
is only required for realm creation.
This removes sender names from the message cache, since
they aren't guaranteed to be valid, and they're inexpensive
to add.
This commit will make the message cache entries smaller
by removing sender___full_name and sender__short_name
fields.
Then we add in the sender fields to the message payloads
by doing a query against the unique sender ids of the
messages we are processing.
This change leads to 2 extra database hops for most of
our message-related codepaths. The reason there are 2 hops
instead of 1 is that we basically re-calculate way too
much data to get a no-markdown dictionary.
This commit prepares us to introduce a StreamLite class. For
these tests, we don't care about the actual contents of the
Stream, just the right stream is there.
Create a new custom email backend which would automatically
logs the emails that are send in the dev environment as
well as print a friendly message in console to visit /emails
for accessing all the emails that are sent in dev environment.
Since django.core.mail.backends.console.EmailBackend is no longer
userd emails would not be printed to the console anymore.
These arguments are only intended to be used for realm creation, and
they make the code more confusing.
We need to make a few changes after doing this, because some tests
were relying on these extra arguments causing the form to not submit
for their error handling.
We don't apply these changes to the LDAP tests, since fixing those
seems complicated.
Previously, invitation reminder emails were only being cleared after a
successful signup if newsletter_data was available, since that was the
circumstance in which we were calling the relevant queue processor
code. Now, we (1) clear them when a human user finishes signing up
and (2) correctly clear them using the 'address' field of
ScheduleEmail, not user_id.
This commit makes get_recipient_info() faster by never creating
Django ORM objects. We use the ORM to create a values query
instead, and then we iterate over the rows to create various
collections of ids.
In order to avoid lots of code duplication, this commit unifies
how we query UserProfile for PMs and streams. Prior to this
commit we were getting "wide" UserProfile objects out of
our memcached cache. Now we just go to the database with our
list of userids. The new approach at worst adds one hop to the
database for PMs, which aren't really a performance bottleneck
(compared to streams). And the new approach actually saves a
hop when both partners aren't in cache (plus we don't pay the
penalty of hitting the cache itself).
The performance improvement here is easy to measure for messages
to streams with many users, even with all the other activity
that goes on inside do_send_messages(). I took test_performance()
in test_messages.py, set num_extra_users to 3000, and consistently
measured a ~20% speedup in do_send_messages().
This commit also eliminates fetching of emails. We probably
could have done that in a prior commit, but in this commit it
is very explicit that we don't need it. While removing email
from the query is a no-brainer, it actually had a negigible
impact on performance. Almost all the savings here comes from
not create UserProfile objects.
Usually a small minority of users are eligible to receive missed
message emails or mobile notifications.
We now filter users first before hitting UserPresence to find idle
users. We also simply check for the existence of recent activity
rather than borrowing the more complicated data structures that we
use for the buddy list.
Use this new variable to determine if the user already exists while
doing registration. While doing login through GitHub if we press
*Go back to login*, we pass email using email variable. As a result,
the login page starts showing the "User already exists error" if we
don't change the variable.
Previously, Zulip's server logs would not show which user or client
was involved in login or user registration actions, which made
debugging more annoying than it needed to be.
This should significantly improve the user experience for new users
signing up with GitHub/Google auth. It comes complete with tests for
the various cases. Further work may be needed for LDAP to not prompt
for a password, however.
Fixes#886.
ScheduledJob was written for much more generality than it ended up being
used for. Currently it is used by send_future_email, and nothing
else. Tailoring the model to emails in particular will make it easier to do
things like selectively clear emails when people unsubscribe from particular
email types, or seamlessly handle using the same email on multiple realms.
This system hasn't been in active use for several years, and had some
problems with it's design. So it makes sense to just remove it to declutter
the codebase.
Fixes#5655.
No change in behavior.
Also makes the first step towards converting all uses of
settings.ZULIP_ADMINISTRATOR and settings.NOREPLY_EMAIL_ADDRESS to
FromAddress.*.
Once everything is converted, it will be easier to ensure that future
development doesn't break backwards compatibility with the old style of
settings emails.
This will allow for customized senders for emails, e.g. 'Zulip Digest' for
digest emails and 'Zulip Missed Messages' for missed message emails.
Also:
* Converts the sender name to always be "Zulip", if the from_email used to
be settings.NOREPLY_EMAIL_ADDRESS or settings.ZULIP_ADMINISTRATOR.
* Changes the default value of settings.NOREPLY_EMAIL_ADDRESS in the
prod_setting_template to no longer have a display name. The only use of
that display name was in the email pathway.
Once we implement org_type-specific features, it'll be easy to change a
corporate realm to a community realm, but hard to go the other way. The main
difference (the main thing that makes migrating from a community realm to a
corporate realm hard) is that you'd have to make everyone sign another terms
of service.
Previously, the only required field in RegistrationForm was the full
name (and possibly ToS, depending on settings). This meant that if
LDAP was configured, realm creation would break, because the form
would be valid the first time one landed on it, before the user even
filled it out!
The correct fix is to make the extra fields required in
RegistrationForm in the event that we're doing realm creation.
It's possible that a cleaner fix would be to use a subclass.
With a test from Umair Waheed Khan.
Fixes#5387.
Server settings should just be added to the context in build_email, so that
the individual email pathways (and later, the email testing framework)
doesn't have to worry about it.
Previously, we were incorrectly using the get_unique_open_realm
function to determine whether we're in the (common) single-realm
server case and should just display an org-info-enabled login form on
the homepage.
Now, we use a slightly different function extracted from
get_unique_open_realm that doesn't check whether the realm is
invite-only.
Fixes#4841.
This is CVE-2017-0896.
Apparently, this setting never actually was wired up to anything other
than hiding the UI widget.
Huge thanks to Ibram Marzouk from the HackerOne community for finding
this security bug.
We now pre-populate the streams in DEFAULT_NEW_REALM_STREAMS
(social/general/zulip, unless somebody changes settings.py) with
welcome messages. This makes the streams appear to be active
right away, and it also gives the Zulip realm less of a
blank-slate feeling when you create it.
This change only affects the normal web-based create-realm flow.
It doesn't impact the management commands for creating realms
or setting default streams.
These handlers will kick into action when is_signup is False. In case
the account exists, the user will be logged in, otherwise, user will
be asked if they want to proceed to registration.
The example_user() function is specifically designed for
AARON, hamlet, cordelia, and friends, and it allows a concise
way of using their built-in user profiles. Eventually, the
widespread use of example_user() should help us with refactorings
such as moving the tests users out of the "zulip.com" realm
and deprecating get_user_profile_by_email.
This commit is a step towards the goal of replacing most of the
send_future_email pathway with a call to send_email.
Note that this commit changes the default value of sender from "Zulip
<NOREPLY_EMAIL_ADDRESS>" to "NOREPLY_EMAIL_ADDRESS". NOREPLY_EMAIL_ADDRESS
will soon be changed to have the Zulip in front.
Note that the correctness of this commit relies on the fact that
send_future_email also sets the sender to settings.NOREPLY_EMAIL_ADDRESS by
default (in the body of the function).
Fixes regression introduced in 326f9a85. The test indirectly makes a call to
email_is_not_mit_mailing_list, which then calls
DNS.dnslookup("%s.pobox.ns.athena.mit.edu" % username, DNS.Type.TXT).
If a user is trying to register for a mit zephyr mirroring realm, we send
them a specific registration email with a link to a few more instructions.
There is only one server that we know about that has such a realm, and that
server uses subdomains. This commit changes the logic to work in the
subdomains case, rather than in the non-subdomains case (though see next
para).
Note that the current check is deceptive, and is not actually correct in the
non-subdomains case. The prereg user has a realm only in the atypical case
of someone registering via the special URL for completely-open realms.
To do this correctly in the non-subdomains case, we would need to copy a
bunch of the logic from the beginning of accounts_register to figure out
which realm the user is signing up for, so that we can check if that realm
is a zephyr mirroring realm. Given how complicated the registration code is
already, I think it is probably not worth it at the moment. This commit also
removes the partial (deceptive) check, since I think it does more harm than
good.
We'll need to implement a version of the simple decoding/decryption
logic used by this library in the mobile code as well, but that should
be simple enough.
This completes a major redesign of the Zulip login and registration
pages, making them look much more slick and modern.
Major features include:
* Display of the realm name, description and icon on the login page
and registration pages in the subdomains case.
* Much slicker looking buttons and input fields.
* A new overall style for the exterior of these portico pages.
This fixes a confusing issue where a user might try resetting the
password for an email account that in part of a different Zulip
organization.
Is a useful early step towards making Zulip support reusing an email
in multiple realms.
Fixes: #4557.
In this commit we add a logout wrapper so as to enable developers
to just do self.logout instead of doing a post request at API
endpoint for logout. This is achieved by adding a wrapper function
for the Django's client.logout contained in TestCase. We add this
by extending ZulipTestCase to have a logout function.
zerver/lib/actions: removed do_set_realm_* functions and added
do_set_realm_property, which takes in a realm object and the name and
value of an attribute to update on that realm.
zerver/tests/test_events.py: refactored realm tests with
do_set_realm_property.
Kept the do_set_realm_authentication_methods and
do_set_realm_message_editing functions because their function
signatures are different.
Addresses part of issue #3854.