Does this relate to the mobile app (e.g. Wikipedia iOS app), or to the mobile website (e.g. en.m.wikipedia.org)?

Sorry, I think it's website not app. In Android on Galaxy Ace 4.

Please can you clarify on what pages you see this. Is this every page or only certain pages?

You say you get taken to edit n-1 so what happens when you click edit on the first button does the editor even load?

Sorry not to reply sooner - I've been away from email, and hence Phabricator notifications, for a few days.

It's an intermittent problem.

Currently,looking at some of "Category:Stubs":

"FileCloud" Pencil icon appears beside lead sentence; clicking it lets me edit lead section.

No pencil icon appears beside "Client"

Pencil icon appears beside "Storage Types": clicking it lets met edit "Client" section

Pencil icon appears beside "See also": leads to "Storage Types"

Pencil icon appears beside "References": leads to "See also"

I can't edit the "References" section on mobile, where (as I see on laptop) the "Stub" tag and categories are found. Perhaps it's significant that there is no text here which shows on screen - there is not even a "Reflist" template, the refs are listed at the end of the article as happens by default.

Other current stubs:

"Law of Sweden": similar problems: pencil icon at lead section, and at sections "Statutes" onward, but not at "Constitution". Each leads to previous section, so the last icon, at "External links", lets me edit the "References" section but not the "External links" section, ... though this contains a real visible External link, so my vague hypothesis above seems wrong.

But "Bright Star (musical)" has icons for lead and "References", its only section, so no problem.

"Boy 7" has 3 icons - lead and 2 sections - and no problem

"Evangelical Lutheran Church - Peru" is OK

"Gloucestershire Archives" OK

"Júlio Gonçalves" OK

"Jordan Air Ambulance Center" is a problem - no icon for "See also", so icon at "External links" leads to "References" (and icon at "References leads to "See also")

"Keith Lewis (cornerback)" OK (only lead plus "References")

"Lurë Lakes" just like the above only has a lead plus a "References" section, but this time there is no icon for the "References". The pencil icon at the lead only shows me the lead section, so I cannot edit the category or the stub tag which, as I see on laptop, are present under "References".

I hope this sample is enough to help! Good luck in trying to find some pattern of what is going on.

I have now found a first example where two sections, not just one, have no edit icon: "Vijayadasami (film)" Current version is at https://en.wikipedia.org/w/index.php?title=Vijayadasami_%28film%29&oldid=697689522 I found the problem both last night (about 8 hours ago) and right now. There are no edit icons on mobile for the sections "Cast" and "Release", and the edit icons for "References" and "External links" each lead back two sections (ie from EL to "Release").

The new title of this bug seems confusing: the problem is that the first (non-top) section has no edit icon, and the edit icons for later sections each point to the immediately previous section. In one example the first and second sections had no icons, and the remaining icons pointed to the last-but-one section.

I think Jon had it the wrong way around.

Example I saw was https://en.m.wikipedia.org/wiki/Category:Stubs edit link points to section 1 rather than 0 which is next section.

There may be similar symptoms here but I suspect they are all linked to same problem.

Change 263081 had a related patch set uploaded (by Florianschmidtwelzow):
Fix lead section handling in MobileFrontend

https://gerrit.wikimedia.org/r/263081

Does the explanation for the problem account for the page where two sections had no edit icons and later icons referred to last-but-one section? See my post of 1 Jan 09:14.

In T122471#1922080, @PamD wrote:

Does the explanation for the problem account for the page where two sections had no edit icons and later icons referred to last-but-one section? See my post of 1 Jan 09:14.

I can't reproduce this problem, sorrry. In diff view, you normaly don't get section edit icons in MobileFrontend iirc. But, if I see it correctly: no, this could not be the problem, the lead section is identified correctly there (in fact, pages in the article namespace shouldn't be affected at all).

Do you have an actual page, where I can see the problem you describe?

All the problems I have encountered and reported have been in article namespace - please read my earlier detailed posts. It was someone else who found a problem with Category:Stubs.

The article "Vijayadasami (film)" still has not just one but two missing edit icons. There is an edit icon for the lead, no problem. There is no edit icon for either "Cast" or "Release". The edit icon at "References" leads me to the "Cast" section; the icon for "External links" leads me to "Release". It is impossible to access those last two sections to edit them. (And as I spend a lot of time stub-sorting, inaccessibility of the final section of an article is a serious obstacle to my constructive editing). This article has been edited (stub-sorted by me, on my laptop) since I reported the problem, but it still has the problem - my mobile is beside me as I type. The current version of the article is at https://en.wikipedia.org/w/index.php?title=Vijayadasami_%28film%29&oldid=697707115.

Looking back at my detailed post of 31 Dec 7:28pm, and picking another example of a file which was then problematic... "Jordan Air Ambulance Center" still has no edit icon for the section after the lead, "History", and the final icon, for "External link", still leads me to the previous section, "References", making it impossible to edit the end of the article.

Is that enough?

Sorry, I can't reproduce the problems you described at any page, nor on neither on https://en.m.wikipedia.org/w/index.php?title=Vijayadasami_(film)&oldid=697707115, nor on https://en.m.wikipedia.org/wiki/Jordan_Air_Ambulance_Center. I've edit icons at each section. Which browser do you use? Can you take a screenshot and upload it here?

No, I do not know how to get a screen shot off my mobile phone. It's a Samsung Galaxy Ace 4, using Android 4.4.4 I believe I'm using a Beta version of the mobile access. The URLs start https://en.m.wikipedia.org/w/....

I've just experimented with my mobile and am constantly confused about various different interfaces. In one dreadful version, the "Category:Stubs" page is useless as it displays a set of 26 links to the A-Z sections, while I prefer to cast an eye over the whole category to decide which stubs to work on.

If, in "Settings", I unclick "Beta" and hit Save, I seem to get a version which doesn't offer me the option to go back to Beta. But somehow I seem to stumble around and get back to it.

It should be possible to use the "Volume Down" + "Power" key (press at the same time) to get a screenshot.

It should be always possible to get back to the beta mode in the settings :)

Sorry, screenshot instructions didn't work on my phone.

I now find that if I click on "View in Browser" I can edit the otherwise inaccessible sections.

Looking at "Qilin, Anhui" just now:

• In my normal mobile view, no edit icon (pencil) beside "References"; only an edit icon beside lead section, clicking which allows me to edit lead section only.

• Clicking on "View page in browser" leads to a view with no visible edit icons ... but clicking in the place where they would be allows me to edit either lead section or "References" section.

• Edited the "References" section successfully: it returns me to the original view, where "View page in browser" is an option.

To be honest I'm never sure whether I'm using an app or not: looking at the "history" list in "Window manager", I see the Qilin, Anhui page shown both with the "W" logo and with the Globe logo.

So it seems that even in articles where there is a missing edit icon, which usually makes the last section inaccessible for editing, it is sometimes (always?) possible to do that editing by going to "View page in browser". This all seems very confusing, but I'm glad to have found a work round which will enable me to continue to stub-sort in mobile view, albeit with an extra step each time.

In T122471#1905246, @TTO wrote:

Does this relate to the mobile app (e.g. Wikipedia iOS app), or to the mobile website (e.g. en.m.wikipedia.org)?

In T122471#1905621, @PamD wrote:

Sorry, I think it's website not app. In Android on Galaxy Ace 4.

In T122471#1929663, @PamD wrote:

I now find that if I click on "View in Browser" I can edit the otherwise inaccessible sections.

-> View in Browser ??? *confused*

Do we really discuss about the website (which you can access with your web browser) or about the Wikipedia app? What do you see, if you open the left navigation bar? If it's the app, we possibly could reopen T65874: Edit link loads the wrong section in some cases (for Mobileview API).

Btw.: I'm pretty sure you use the app. The article "Qilin, Anhui" in mobile web:

and in the app:

I seem to use both, but yes, it's the app view which I recognise.

My procedure is:

• Click on "Internet" icon on phone
• Click on "Bookmarks" icon
• See a Bookmarks list which includes "Stubs" with a "W" icon and also "Watchlist" with a globe icon.

-If I choose Watchlist, then I get a watchlist divided into "All", "Pages", "Talk" and "Other". If I click on an item on it I get a display of the diff; clicking on the article title goes through a grey screen with a large central "W" to (Usually) a "Choose an action" panel offering Chrome or Internet. I choose "Internet" and it leads me to a display looking like your app display (more or less). (That Chrome/Internet option doesn't always happen).

• If I choose Stubs, I get a listing (currently displaying the blue "Wikipedia turns 15" banner) from which I can select items (and it lists a page of up to 200 stubs, showing them all, while another format I've sometimes fallen into only offers 26 A-Z section headings to click on, which is unhelpful). If I select an item it goes through that grey "W" screen, briefly shows a list of recent pages each with an icon which is perhaps a page stereotype (grey oblong, some lines to imitate text, white square top right), and ends up with an article like your app illustration.

I've bookmarked those two listings, at some point in the past, having found them as my useful access point to Wikipedia. I remain confused!

Update:
Behaviour seems to have changed - edit icon https://en.m.wikipedia.org/wiki/Category:Stubs now points to lead but subsequent sections are not editable.
It seems that the section wrapping code is not running on this page.
Edit icons however are not showing.

This is because of the line $heading.next().is( 'div' ) not true and thus the open-block class doesn't get added to the heading and thus .open-block .edit-page never changes the edit icon to display inline-block (in that case it should just be shown)

@Florian I think we can fix this with some minor JS/CSS changes. I would much rather we don't touch the MobileFormatter code.

@Jdlrobson: the problem was (generally) solved after I edited the page: https://en.wikipedia.org/w/index.php?title=Category%3AStubs&type=revision&diff=698875126&oldid=693081498 so, I'm pretty sure, that the underlying problem itself isn't fixed (but haven't tested). I'm not sure, if some JS/CSS is enough, the problem is definitely the MobileFormatter (I don't like this, too, but... :P). Btw. MobileFormatter currently doesn't run on Category pages, IIRC.

I'm still having the problem of inability to edit final section of many articles because the edit icons are loading the wrong sections, but have today found a new problem which is probably related.

When I look at Wikipedia talk:Disambiguation, in the app, I'm seeing sections under the wrong section headings. eg section heading "Freedom of Information ...", text below it starts "I was workindg on disambiguation of Posthumous...". It's reproducible on that talk page and also Wikipedia talk:Wikiproject Disambiguation. (Both last edited at 02:00 today)

I've cracked the question of how to do a screenshot (Home + Power) by looking in the online user manual for my phone:"If all else fails read the instructions". But can't right now get phone to communicate with laptop to upload. Will try again later.

It would be great, if you could open a new task regarding the app :/ Btw.: As far as I know, talk pages aren't supported by the app :]

@Jdlrobson: Isn't your problem slightly different from the one described here? If I reproduce the wikitext from the version with ==References= locally, I can still edit all sections (and any section edit link opens the desired section). This task is about the problem, that I can't edit the lead section on pages, where the first part of the content is a div element (and the lead edit icon opens the first section, instead of section 0). To fix this problem, we would need to change the MobileFormatter (as it currently doesn't handle to wrap the lead section on other pages as the ones of the main namespace, but the editor code expects to have such a wrapped lead section).

Btw.: @PamD: For your App problem I would suggest you to subscribe to: T65874: Edit link loads the wrong section in some cases (for Mobileview API) :)

@Florian in that example I was unable to edit the lead section too. The formatter gets confused if higher headings appear below lower one (e.g. h1s that are below h2s)

Can you give me several test cases (in raw wikitext) where the formatter breaks that your formatter changes fix.

The simplest case would be something like:

<div class="just an empty div"></div>
The other page text goes here.

== testsection 1 ==
testtesttest

The long(er) version:
Category:Stubs

{{stub-sorting-backlog|100}}
{{hidden category}}
{{WPSS-cat}}
{{empty category}}
{{shortcut|CAT:STUB|CAT:STUBS}}
<center>{{Random page in category}}</center>

This is a [[Wikipedia:Category|category]] of '''[[Wikipedia:Stub|stub articles]]'''. Please check the articles listed here and remove the {{tlp|stub}} tag from them if they have been expanded since the tag was originally added.

Please put any stub-sized articles into an appropriate '''[[Wikipedia:Stub categories|stub category]]''', by using a [[Wikipedia:WikiProject Stub sorting/Stub types|stub tag for a specific topic]] instead of a generic stub tag, where possible; for example, by using the {{tl|art-stub}} tag or one of its subtypes for art-related stubs. Ideally, this category should be empty or close to empty.

{{purge button|right}}
See [[Wikipedia:WikiProject Stub sorting/Stub types]] for a complete listing in an organized catalogue of topics. Several tools are available which are helpful in finding stubs related to a given category. These - and other information about stubs - can be found listed at [[Wikipedia:Stub]].

Since this particular category is added to very regularly when people use the [[:Template:Stub|stub template]], active efforts to move stubs into topic stubs, or convert stubs into larger articles, are greatly appreciated. If you would like to help, please visit the [[Wikipedia:WikiProject Stub sorting|Stub-sorting WikiProject]] for more information.

== See also ==
{{Commons category|Stub icons}}
* [[:Category:All stub articles]]
* [[:Category:Articles to be expanded]]
* [[:Category:Stub categories]]

{{clear}}
{{Category TOC}}


[[Category:WikiProject Stub sorting]]
[[Category:Top-level stub categories|*]]

Template:Shortcut

<includeonly>{{#invoke:Shortcut|main}}</includeonly><noinclude>
{{documentation}}
<!-- Categories go on the /doc subpage, and interwikis go on Wikidata. -->
</noinclude>

Module:shortcut

In fact, it doesn't matter, what you use, the importnat part is the empty first div, and that you open a page, which currently isn't processed by MobileFormatter (e.g. catgeory pages, talk pages (iirc) or file pages).

Is there any way we can clean up those empty divs outside the MobileFormatter (why are they empty...)?

They're used to allow linking to the element:
https://en.wikipedia.org/wiki/Category:Stubs#CAT:STUB

In fact: They aren't really "empty", they just don't have a visible text content (there are some span elements to allow linking with a hash fragment).

I don't see an easy way to clean this up entirely :/

Change 263081 merged by jenkins-bot:
Fix lead section handling in MobileFrontend

https://gerrit.wikimedia.org/r/263081

Thanks. I look forward to not seeing the problem again, and will let you know if I see it after next Thursday.

Unfortunately the problem has not been solved. I have observed the problem several times since 10th Sept, but am now sitting with phone and laptop together so can report on it.

I cannot edit the final section of https://en.wikipedia.org/wiki/Mary_Lou_Bruner on my mobile because the edit icon for "External links" leads to "References", etc. There is an edit icon for the lead section, but no icon for the first headed section, "Public Statements", and its first subheading "On Barack Obama". There are icons for the next subheading, "On the assassination of John F. Kennedy", and all other headings, but each one leads me to the previous section instead of where I am aiming.

Looking at other entries in Category:Stubs:-

Aam Aadmi Party Youth Wing - ok
Abraham de Villiers - ok
Adung Long - ok
Angkatan Amanah Merdeka - ok
Bansaha - ok
Brussels Gallery Weekend - ok
Cascade impactor - no sections, ok
Monita Chatterjee - no icon for either "References" or "External links" sections
Jamie Clay - ok
Club Dancer 2016 - no sections, ok
Coolfont Resort - no sections, ok
Copper tape - ok
Gil Cuadros - ok
Delegation - ok
Digital billboard - no icon for first heading "Safety concerns", so icon at "References" leads to "Safety concerns" instead

I could continue, but that's a random selection of articles - stubs starting at initial "A". I see no obvious pattern as to why some show this problem and others not, but there must be some subtle thread there.

Mary Lou Bruner was only created on 19th March (I wondered whether articles created before the change might be the problem ... but not so.) Digital billboard has been around since 2010, though only recently labelled as a stub.

I look forward to hearing more about this still-unresolved problem.

I was previously asked to provide a screen shot: If I succeed in getting one on my phone, where should I upload it to, or email it to, if it would still be useful?

To clarify: the problem described above is when using the app.

And my app settings tells me I'm in Beta-2016-02-10.

@PamD since this issue relates to the app not the web I've created a new task for you - T130698

Just to report I'm encountering the following error on https://fr.wikipedia.org/w/index.php?title=Nils_Nilsson&oldid=138436684&useskin=minerva

Uncaught TypeError: Cannot read property 'text' of null

page.getLeadSectionElement() returns null here:

// FIXME: unfortunately the main page is special cased.
if ( mw.config.get( 'wgIsMainPage' ) || isNewPage || page.getLeadSectionElement().text() ) {
	// if lead section is not empty, open editor with lead section
	addEditButton( 0, '#ca-edit' );
} else {
	// if lead section is empty, open editor with first section
	addEditButton( 1, '#ca-edit' );
}

Thanks @Od1n have setup T169003 to capture this!