When upgrading to `utf8mb4`, `TEXT` fields will be upgraded to `MEDIUMTEXT` (and likewise for all other `*TEXT` and `*BLOB` fields). This is to allow for the additional space requirements of `utf8mb4`.
On the subsequent upgrade, `dbDelta()` would try and downgrade the fields to their original size again. At best, this it a waste of time, at worst, this could truncate any data larger than the original size. There's no harm in leaving them at their new size, so let's do that.
This also fixes a typo in the `dbDelta()` tests.
Merge of [37525] to the 4.4 branch.
Partial merge of [36552] to the 4.4 branch.
See #36748.
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The codex says that taxonomy names "should only contain lowercase letters and the underscore character", but that's not enforced. It's too late to enforce it, since some plugins haven't been following it and the official phpdoc doesn't mention this restriction.
Merge of [37133] to the 4.4 branch.
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When the browser test for diversity emoji was added in [36160], it included a workaround for Chrome not being able to compare Uint8ClampedArray objects directly, by converting them to a string. Unfortunately, Safari doesn't support the Uint8ClampedArray.toString() method correctly, so the test was incorrectly failing in Safari.
Merge of [37028] to the 4.4 branch.
Fixes#36266.
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IE 11's implementation of MutationObserver is buggy. It unnecessarily splits text nodes when it encounters a HTML template interpolation symbol ( "{{", for example ). So, we join the text nodes back together as a work-around.
Merge of [36817] and [36981] to the 4.4 branch.
Fixes#35977.
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Fixes issue where user gets stuck at login screen after trying to close the app if previously they had to first login to access the Customizer. Prevents `WP_Customize_Manager::get_return_url()` from using `wp-login.php` as a referer.
Merges [36261] to the 4.4 branch.
Props chandrapatel.
See #32637.
Fixes#35355.
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In order to calculate comment pagination when newest comments are displayed
first, `comments_template()` must perform a separate query to determine the
total number of paginating comments available on a post. See [34729], #8071,
pagination calculation - can be defined as a top-level comment, or a comment
with `parent=0`. However, when comment threading is disabled, yet comments
exist in the database that have parents, all comments - even those with a
parent - are "paginating". (This typically happens when comments threading was
once enabled, but has since been turned off.) As such, the total-paginating-
comments query should only be limited to top-level comments when
'thread_comments' is disabled.
Merges [36275] to the 4.4 branch.
Props jmdodd.
Fixes#35419.
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The refactor of `WP_Comment_Query`'s SQL generation in [34542] introduced a bug
that caused only the last post-related filter to be respected in comment
queries. In other words, if querying for comments using params
`post_status=draft&post_author=3`, only the last-processed of these params
would be respected. The current changeset fixes the logic so that these clauses
don't overwrite each other.
Merges [36326] to the 4.4 branch.
Props chriscct7.
Fixes#35478.
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[36157] fixed a problem, introduced in 4.4, that caused custom pagination
parameters passed to `wp_list_comments()`. However, the fix introduced in that
changeset was limited to the `is_singular()` context, so that the bug remained
when `wp_list_comments()` is used within a non-singular `WP_Query` loop. We
fix this by removing the `is_singular()` check and using the more general
`get_the_ID()` to identify the correct post_id to use for the secondary
comment query.
Merges [36324] to the 4.4 branch.
Props boonebgorges.
Fixes#35402.
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[34999] modified the cache strategy for terms in the context of
`wp_get_object_terms()`. As part of these changes, the `object_id` property of
term objects had to be unset before being cached. To avoid modifying passed-by-
reference terms, `update_term_cache()` attempted to make a copy of the terms
passed to the function; however, it failed to use the `clone` keyword, and thus
only created a reference instead of a copy.
Merges [36323] to the 4.4 branch.
Props berengerzyla.
Fixes#35462.
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Aaron Campbell
Dion Hulse
Joe McGill
Jeremy Felt
Pascal Birchler
Gary Pendergast
Boone Gorges
Nikolay Bachiyski
Rachel Baker
Dominik Schilling
Aaron Jorbin
Sergey Biryukov