tdf#156077 sw: layout: call AssertFlyPages() in Init()

The bugdoc has 3 pages, and there are at-page flys anchored to the 3rd
page, and these are not displayed - simply missing from the layout.

In LO 6.1, this worked because the layout-cache was read from the file,
and 3 pages were created in SwRootFrame::Init() calling InsertCnt_().

But now this creates only 2 pages, and later SwLayAction creates the 2nd
page between the existing ones on some MoveFwd(), but despite page nr 2
becoming page nr 3 nothing attaches the at-page flys to the now-page-3.

If a document is loaded containing at-page flys, then all pages that
have flys anchored to them should be created in SwRootFrame::Init()
already.

(regression from commit 7e8b4756d95057f069467b34e7849f9354856578)

Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153720
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit ff8ec4cfe5df1e15c3e9f6adc843dfe31358e097)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153699
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
(cherry picked from commit c34e72ff817b07403f908a9098dd513b96c30ad1)

Change-Id: I4792c483a7620efd81211e6ad0d9220152367d68

3 files changed, 377 insertions, 0 deletions

diff --git a/sw/qa/extras/layout/data/s4_min2.fodt b/sw/qa/extras/layout/data/s4_min2.fodt
new file mode 100644
index 000000000000..e1317de597d8
--- /dev/null
+++ b/sw/qa/extras/layout/data/s4_min2.fodt
@@ -0,0 +1,360 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:officeooo="http://openoffice.org/2009/office" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:drawooo="http://openoffice.org/2010/draw" xmlns:calcext="urn:org:documentfoundation:names:experimental:calc:xmlns:calcext:1.0" xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:meta><meta:generator>CIB_OfficeDev/6.1.7.41$Linux_X86_64 LibreOffice_project/1df0ab666a1bb346850daa72aaa2e29a697a252c</meta:generator><meta:creation-date>2023-06-26T22:28:03.054604345</meta:creation-date><dc:language>de-DE</dc:language><meta:editing-cycles>11</meta:editing-cycles><meta:editing-duration>PT14M3S</meta:editing-duration><dc:date>2023-06-26T23:06:43.147312212</dc:date><meta:document-statistic meta:table-count="1" meta:image-count="0" meta:object-count="0" meta:page-count="3" meta:paragraph-count="14" meta:word-count="247" meta:character-count="1680"/><meta:user-defined meta:name="Info 1"/><meta:user-defined meta:name="Info 2"/><meta:user-defined meta:name="Info 3"/><meta:user-defined meta:name="Info 4"/></office:meta>
+ <office:font-face-decls>
+  <style:font-face style:name="Arial" svg:font-family="Arial" style:font-pitch="variable"/>
+  <style:font-face style:name="Arial Unicode MS" svg:font-family="'Arial Unicode MS'" style:font-pitch="variable"/>
+  <style:font-face style:name="HG Mincho Light J" svg:font-family="'HG Mincho Light J'" style:font-pitch="variable"/>
+  <style:font-face style:name="Times New Roman" svg:font-family="'Times New Roman'" style:font-pitch="variable"/>
+  <style:font-face style:name="Thorndale" svg:font-family="Thorndale" style:font-family-generic="roman" style:font-pitch="variable"/>
+ </office:font-face-decls>
+ <office:styles>
+  <style:default-style style:family="graphic">
+   <style:graphic-properties svg:stroke-color="#808080" draw:fill-color="#cfe7f5" fo:wrap-option="no-wrap" draw:shadow-offset-x="0.3cm" draw:shadow-offset-y="0.3cm" draw:start-line-spacing-horizontal="0.283cm" draw:start-line-spacing-vertical="0.283cm" draw:end-line-spacing-horizontal="0.283cm" draw:end-line-spacing-vertical="0.283cm" style:flow-with-text="true"/>
+   <style:paragraph-properties style:text-autospace="ideograph-alpha" style:line-break="strict" style:font-independent-line-spacing="false">
+    <style:tab-stops/>
+   </style:paragraph-properties>
+   <style:text-properties fo:color="#000000" style:font-name="Thorndale" fo:font-size="12pt" fo:language="de" fo:country="DE" style:font-name-asian="HG Mincho Light J" style:font-size-asian="12pt" style:language-asian="zxx" style:country-asian="none" style:font-name-complex="Arial Unicode MS" style:font-size-complex="12pt" style:language-complex="zxx" style:country-complex="none"/>
+  </style:default-style>
+  <style:default-style style:family="paragraph">
+   <style:paragraph-properties fo:hyphenation-ladder-count="no-limit" style:text-autospace="ideograph-alpha" style:punctuation-wrap="hanging" style:line-break="strict" style:tab-stop-distance="2cm" style:writing-mode="lr-tb"/>
+   <style:text-properties fo:color="#000000" style:font-name="Thorndale" fo:font-size="12pt" fo:language="de" fo:country="DE" style:font-name-asian="HG Mincho Light J" style:font-size-asian="12pt" style:language-asian="zxx" style:country-asian="none" style:font-name-complex="Arial Unicode MS" style:font-size-complex="12pt" style:language-complex="zxx" style:country-complex="none" fo:hyphenate="false" fo:hyphenation-remain-char-count="2" fo:hyphenation-push-char-count="2"/>
+  </style:default-style>
+  <style:default-style style:family="table">
+   <style:table-properties table:border-model="separating"/>
+  </style:default-style>
+  <style:default-style style:family="table-row">
+   <style:table-row-properties fo:keep-together="always"/>
+  </style:default-style>
+  <style:style style:name="Standard" style:family="paragraph" style:class="text">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0cm" loext:contextual-spacing="false" fo:hyphenation-ladder-count="no-limit"/>
+   <style:text-properties style:font-name="Arial" fo:font-family="Arial" style:font-pitch="variable" fo:hyphenate="true" fo:hyphenation-remain-char-count="4" fo:hyphenation-push-char-count="4"/>
+  </style:style>
+  <style:style style:name="Text_20_body" style:display-name="Text body" style:family="paragraph" style:parent-style-name="Standard" style:class="text">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0cm" loext:contextual-spacing="false" fo:hyphenation-ladder-count="no-limit"/>
+   <style:text-properties style:font-name="Arial" fo:font-family="Arial" style:font-pitch="variable" fo:hyphenate="true" fo:hyphenation-remain-char-count="4" fo:hyphenation-push-char-count="4"/>
+  </style:style>
+  <style:style style:name="Footer" style:family="paragraph" style:parent-style-name="Standard" style:class="extra">
+   <style:paragraph-properties>
+    <style:tab-stops>
+     <style:tab-stop style:position="8.5cm" style:type="center"/>
+     <style:tab-stop style:position="17.002cm" style:type="right"/>
+    </style:tab-stops>
+   </style:paragraph-properties>
+  </style:style>
+  <style:style style:name="Table_20_Contents" style:display-name="Table Contents" style:family="paragraph" style:parent-style-name="Text_20_body" style:class="extra"/>
+  <style:style style:name="Frame_20_contents" style:display-name="Frame contents" style:family="paragraph" style:parent-style-name="Text_20_body" style:class="extra"/>
+  <style:style style:name="Arial_5f_12_5f_Links" style:display-name="Arial_12_Links" style:family="paragraph" style:parent-style-name="Standard">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0cm" loext:contextual-spacing="false" fo:hyphenation-ladder-count="no-limit"/>
+   <style:text-properties style:font-name="Arial" fo:font-family="Arial" style:font-pitch="variable" fo:font-weight="350" fo:hyphenate="false" fo:hyphenation-remain-char-count="4" fo:hyphenation-push-char-count="4"/>
+  </style:style>
+  <style:style style:name="TVS_20_Standard" style:display-name="TVS Standard" style:family="paragraph" style:master-page-name="">
+   <style:paragraph-properties fo:hyphenation-ladder-count="no-limit" style:page-number="auto"/>
+   <style:text-properties style:font-name="Arial" fo:font-family="Arial" style:font-pitch="variable" fo:hyphenate="true" fo:hyphenation-remain-char-count="4" fo:hyphenation-push-char-count="4"/>
+  </style:style>
+  <style:style style:name="TVS_20_KopfzeileFKB_5f_S2" style:display-name="TVS KopfzeileFKB_S2" style:family="paragraph" style:parent-style-name="TVS_20_Standard">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false"/>
+   <style:text-properties fo:font-size="8pt"/>
+  </style:style>
+  <style:style style:name="TVS_20_FußzeileFKB" style:display-name="TVS FußzeileFKB" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:master-page-name="">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false" style:page-number="auto" style:vertical-align="middle"/>
+   <style:text-properties style:font-name="Times New Roman" fo:font-family="'Times New Roman'" style:font-pitch="variable" fo:font-size="8pt"/>
+  </style:style>
+  <style:style style:name="TVS_20_Adressfeld" style:display-name="TVS Adressfeld" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:master-page-name="">
+   <style:paragraph-properties style:page-number="auto"/>
+   <style:text-properties fo:language="zxx" fo:country="none"/>
+  </style:style>
+  <style:style style:name="TVS_20_Unsichtbar" style:display-name="TVS Unsichtbar" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:master-page-name="">
+   <style:paragraph-properties style:page-number="auto"/>
+   <style:text-properties fo:font-size="2pt"/>
+  </style:style>
+  <style:style style:name="TVS_20_Mehrfertigung" style:display-name="TVS Mehrfertigung" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:master-page-name="">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false" style:page-number="auto"/>
+   <style:text-properties fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="TVS_20_Absender" style:display-name="TVS Absender" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:master-page-name="">
+   <style:paragraph-properties style:page-number="auto"/>
+   <style:text-properties style:font-name="Times New Roman" fo:font-family="'Times New Roman'" style:font-pitch="variable" fo:font-size="8pt"/>
+  </style:style>
+  <style:style style:name="TVS_20_Anrede" style:display-name="TVS Anrede" style:family="paragraph" style:parent-style-name="TVS_20_Standard" style:next-style-name="TVS_20_Freitext">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0.42cm" loext:contextual-spacing="false"/>
+  </style:style>
+  <style:style style:name="TVS_20_Freitext" style:display-name="TVS Freitext" style:family="paragraph" style:parent-style-name="TVS_20_Standard">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0.42cm" loext:contextual-spacing="false"/>
+  </style:style>
+  <style:style style:name="Footnote_20_Symbol" style:display-name="Footnote Symbol" style:family="text"/>
+  <style:style style:name="Endnote_20_Symbol" style:display-name="Endnote Symbol" style:family="text"/>
+  <style:style style:name="TVS_20_Fett" style:display-name="TVS Fett" style:family="text">
+   <style:text-properties fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="Footnote_20_anchor" style:display-name="Footnote anchor" style:family="text">
+   <style:text-properties style:text-position="super 58%"/>
+  </style:style>
+  <style:style style:name="Endnote_20_anchor" style:display-name="Endnote anchor" style:family="text">
+   <style:text-properties style:text-position="super 58%"/>
+  </style:style>
+  <style:style style:name="Frame" style:family="graphic">
+   <style:graphic-properties svg:width="7.696cm" fo:min-height="3.519cm" text:anchor-type="page" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:wrap-contour="false">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+   </style:graphic-properties>
+  </style:style>
+  <text:outline-style style:name="Outline">
+   <text:outline-level-style text:level="1" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="2" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="3" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="4" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="5" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="6" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="7" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="8" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="9" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="10" style:num-format="">
+    <style:list-level-properties/>
+   </text:outline-level-style>
+  </text:outline-style>
+  <text:notes-configuration text:note-class="footnote" text:citation-style-name="Footnote_20_Symbol" text:citation-body-style-name="Footnote_20_anchor" text:master-page-name="Standard" style:num-format="1" text:start-value="0" text:footnotes-position="page" text:start-numbering-at="document"/>
+  <text:notes-configuration text:note-class="endnote" text:citation-style-name="Endnote_20_Symbol" text:citation-body-style-name="Endnote_20_anchor" text:master-page-name="Endnote" style:num-format="1" text:start-value="0"/>
+  <text:linenumbering-configuration text:number-lines="false" text:offset="0.499cm" style:num-format="1" text:number-position="left" text:increment="5"/>
+ </office:styles>
+ <office:automatic-styles>
+  <style:style style:name="Tabelle1" style:family="table">
+   <style:table-properties style:width="16.574cm" table:align="margins"/>
+  </style:style>
+  <style:style style:name="Tabelle1.A" style:family="table-column">
+   <style:table-column-properties style:column-width="16.574cm" style:rel-column-width="65535*"/>
+  </style:style>
+  <style:style style:name="Tabelle1.A1" style:family="table-cell">
+   <style:table-cell-properties fo:padding="0.097cm" fo:border="none"/>
+  </style:style>
+  <style:style style:name="P1" style:family="paragraph" style:parent-style-name="Standard">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false"/>
+   <style:text-properties fo:font-size="2pt" fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="P2" style:family="paragraph" style:parent-style-name="Standard">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false"/>
+   <style:text-properties fo:font-size="14pt" fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="P3" style:family="paragraph" style:parent-style-name="Standard">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false"/>
+   <style:text-properties fo:font-size="10pt" fo:font-weight="normal"/>
+  </style:style>
+  <style:style style:name="P4" style:family="paragraph" style:parent-style-name="Standard">
+   <style:text-properties/>
+  </style:style>
+  <style:style style:name="P5" style:family="paragraph" style:parent-style-name="TVS_20_Adressfeld">
+   <style:text-properties fo:font-size="10pt"/>
+  </style:style>
+  <style:style style:name="P6" style:family="paragraph" style:parent-style-name="Table_20_Contents">
+   <style:text-properties fo:font-size="12pt" style:font-size-asian="12pt" style:font-size-complex="12pt"/>
+  </style:style>
+  <style:style style:name="P7" style:family="paragraph" style:parent-style-name="Arial_5f_12_5f_Links">
+   <style:text-properties/>
+  </style:style>
+  <style:style style:name="P8" style:family="paragraph" style:parent-style-name="Standard" style:master-page-name="Standard2">
+   <style:paragraph-properties fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0cm" fo:margin-bottom="0cm" loext:contextual-spacing="false" fo:text-indent="0cm" style:auto-text-indent="false" style:page-number="auto"/>
+   <style:text-properties style:font-name="Arial" fo:font-size="12pt" fo:font-style="normal" style:text-underline-style="none" fo:font-weight="bold" style:font-size-asian="12pt" style:font-weight-asian="normal" style:font-size-complex="12pt" style:font-weight-complex="normal"/>
+  </style:style>
+  <style:style style:name="P9" style:family="paragraph" style:parent-style-name="TVS_20_Anrede" style:master-page-name="FABrief_5f_S1">
+   <style:paragraph-properties style:page-number="auto"/>
+  </style:style>
+  <style:style style:name="fr1" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="size position" style:vertical-pos="from-top" style:vertical-rel="paragraph" style:horizontal-pos="from-left" style:horizontal-rel="paragraph" fo:padding="0cm" fo:border="none" style:shadow="none" draw:shadow-opacity="100%"/>
+  </style:style>
+  <style:style style:name="fr2" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0cm" fo:margin-bottom="0cm" style:protect="content size position" style:vertical-pos="middle" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="paragraph" fo:padding="0cm" fo:border-left="none" fo:border-right="none" fo:border-top="0.51pt solid #000000" fo:border-bottom="none"/>
+  </style:style>
+  <style:style style:name="fr3" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="size position" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="from-top" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="page" fo:padding="0cm" fo:border="none">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+   </style:graphic-properties>
+  </style:style>
+  <style:style style:name="fr4" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="size position" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="from-top" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="page" fo:background-color="transparent" draw:fill="none" draw:fill-color="#ffffff" fo:padding="0cm" fo:border-left="none" fo:border-right="none" fo:border-top="none" fo:border-bottom="0.51pt solid #000000"/>
+  </style:style>
+  <style:style style:name="fr5" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="size position" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="from-top" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="page" style:shadow="none" draw:shadow-opacity="100%"/>
+  </style:style>
+  <style:style style:name="fr6" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="size position" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="from-top" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="paragraph" fo:padding="0cm" fo:border="none">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+   </style:graphic-properties>
+  </style:style>
+  <style:style style:name="fr7" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties style:protect="position" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="from-top" style:vertical-rel="page" style:horizontal-pos="from-left" style:horizontal-rel="page">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+   </style:graphic-properties>
+  </style:style>
+  <style:style style:name="Sect1" style:family="section">
+   <style:section-properties style:editable="false">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+   </style:section-properties>
+  </style:style>
+  <style:page-layout style:name="pm1">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:paper-tray-name="[From printer settings]" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="true" style:layout-grid-display="true" draw:fill="none" draw:fill-color="#cfe7f5" style:footnote-max-height="0cm">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm2" style:page-usage="mirrored">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:paper-tray-name="[From printer settings]" style:print-orientation="portrait" fo:margin-top="1.3cm" fo:margin-bottom="1.799cm" fo:margin-left="2.9cm" fo:margin-right="1.799cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="true" style:layout-grid-display="true" draw:fill="none" draw:fill-color="#cfe7f5" style:footnote-max-height="0cm">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style>
+    <style:header-footer-properties svg:height="1.9cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-bottom="1.401cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:dynamic-spacing="false" draw:fill="none" draw:fill-color="#cfe7f5"/>
+   </style:header-style>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm3">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="8.7cm" fo:margin-bottom="1.799cm" fo:margin-left="2.193cm" fo:margin-right="1.799cm" fo:background-color="transparent" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="false" style:layout-grid-display="false" draw:fill="none" draw:fill-color="#cfe7f5" style:footnote-max-height="0cm">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm4">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="false" style:layout-grid-display="false" style:footnote-max-height="0cm">
+    <style:footnote-sep style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm5" style:page-usage="mirrored">
+   <style:page-layout-properties fo:page-width="29.7cm" fo:page-height="21.001cm" style:num-format="1" style:paper-tray-name="[From printer settings]" style:print-orientation="landscape" fo:margin-top="2.9cm" fo:margin-bottom="1.799cm" fo:margin-left="2cm" fo:margin-right="2cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="true" style:layout-grid-display="true" draw:fill="none" draw:fill-color="#cfe7f5" style:footnote-max-height="0cm">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style>
+    <style:header-footer-properties fo:min-height="0.499cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-bottom="0.499cm" fo:border="none" fo:padding="0cm" fo:background-color="transparent" style:dynamic-spacing="false" draw:fill="none" draw:fill-color="#cfe7f5"/>
+   </style:header-style>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm6">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:paper-tray-name="[From printer settings]" style:print-orientation="portrait" fo:margin-top="10.7cm" fo:margin-bottom="2.2cm" fo:margin-left="2.9cm" fo:margin-right="1.799cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="true" style:layout-grid-display="true" draw:fill="none" draw:fill-color="#cfe7f5" style:footnote-max-height="0cm">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style>
+    <style:header-footer-properties svg:height="2.401cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0.3cm" fo:border="none" fo:padding="0cm" style:shadow="none" fo:background-color="transparent" style:dynamic-spacing="false" draw:fill="none" draw:fill-color="#cfe7f5"/>
+   </style:footer-style>
+  </style:page-layout>
+ </office:automatic-styles>
+ <office:master-styles>
+  <style:master-page style:name="Standard" style:page-layout-name="pm1"/>
+  <style:master-page style:name="FABrief_5f_S2" style:display-name="FABrief_S2" style:page-layout-name="pm2">
+   <style:header>
+    <text:p text:style-name="TVS_20_KopfzeileFKB_5f_S2">- <text:page-number text:select-page="current">2</text:page-number><text:s/>-</text:p>
+   </style:header>
+  </style:master-page>
+  <style:master-page style:name="Standard2" style:page-layout-name="pm3" style:next-style-name="FABrief_5f_S2"/>
+  <style:master-page style:name="Endnote" style:page-layout-name="pm4"/>
+  <style:master-page style:name="FABrief_5f_S1" style:display-name="FABrief_S1" style:page-layout-name="pm6" style:next-style-name="FABrief_5f_S2">
+   <style:footer>
+    <text:p text:style-name="Footer"><draw:frame draw:style-name="fr1" draw:name="ES_FUSSZEILE" text:anchor-type="paragraph" svg:x="0cm" svg:y="0cm" svg:width="16.3cm" svg:height="2.101cm" draw:z-index="7">
+      <draw:text-box>
+       <text:p text:style-name="TVS_20_FußzeileFKB"><text:span text:style-name="TVS_20_Fett"/></text:p>
+      </draw:text-box>
+     </draw:frame></text:p>
+   </style:footer>
+  </style:master-page>
+ </office:master-styles>
+ <office:body>
+  <office:text text:use-soft-page-breaks="true">
+   <office:forms form:automatic-focus="false" form:apply-design-mode="false"/>
+   <text:sequence-decls>
+    <text:sequence-decl text:display-outline-level="0" text:name="Illustration"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Table"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Text"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Drawing"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Figure"/>
+   </text:sequence-decls>
+   <text:user-field-decls>
+    <text:user-field-decl office:value-type="string" office:string-value="" text:name="RF_POSTADR1"/>
+    <text:user-field-decl office:value-type="string" office:string-value="" text:name="RF_POSTADR2"/>
+    <text:user-field-decl office:value-type="string" office:string-value="" text:name="IF_MEHRFERTIGUNG"/>
+    <text:user-field-decl office:value-type="string" office:string-value="" text:name="ES_BRIEFANREDE"/>
+    <text:user-field-decl office:value-type="string" office:string-value="" text:name="IF_AUSBL_DSGVO"/>
+   </text:user-field-decls><draw:frame draw:style-name="fr2" draw:name="Rahmen2" text:anchor-type="page" text:anchor-page-number="2" svg:x="0.6cm" svg:width="0.497cm" svg:height="0.041cm" draw:z-index="0">
+    <draw:text-box>
+     <text:p text:style-name="Frame_20_contents"/>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr3" draw:name="ES_ADRESSFELD" text:anchor-type="page" text:anchor-page-number="1" svg:x="2cm" svg:y="6.549cm" svg:width="8.5cm" svg:height="2.799cm" draw:z-index="1">
+    <draw:text-box>
+     <text:p text:style-name="P5"/>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr4" draw:name="Absender" text:anchor-type="page" text:anchor-page-number="1" svg:x="2cm" svg:y="4.3cm" svg:width="8.5cm" svg:height="0.651cm" draw:z-index="2">
+    <draw:text-box>
+     <text:p text:style-name="TVS_20_Absender"><text:user-field-get text:name="RF_POSTADR1"/><text:line-break/><text:user-field-get text:name="RF_POSTADR2"/></text:p>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr5" draw:name="Mehrfertigung" text:anchor-type="page" text:anchor-page-number="1" svg:x="10.901cm" svg:y="4.3cm" svg:width="8.4cm" svg:height="0.55cm" draw:z-index="3">
+    <draw:text-box>
+     <text:p text:style-name="TVS_20_Mehrfertigung"><text:user-field-get text:name="IF_MEHRFERTIGUNG"/></text:p>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr6" draw:name="ES_ADRESSFELD_FA00" text:anchor-type="page" text:anchor-page-number="3" svg:x="2.221cm" svg:y="4.484cm" svg:width="7.878cm" draw:z-index="4">
+    <draw:text-box fo:min-height="3.701cm">
+     <text:p text:style-name="P7">Second box</text:p>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr6" draw:name="Absender_Stpfl" text:anchor-type="page" text:anchor-page-number="3" svg:x="11.312cm" svg:y="4.228cm" svg:width="7.828cm" draw:z-index="5">
+    <draw:text-box fo:min-height="3.62cm">
+     <text:p text:style-name="P7">Third box</text:p>
+    </draw:text-box>
+   </draw:frame><draw:frame draw:style-name="fr7" draw:name="Kopf_Fragebogen" text:anchor-type="page" text:anchor-page-number="3" svg:x="2.17cm" svg:y="1.36cm" svg:width="16.574cm" draw:z-index="6">
+    <draw:text-box fo:min-height="1.353cm">
+     <table:table table:name="Tabelle1" table:style-name="Tabelle1">
+      <table:table-column table:style-name="Tabelle1.A"/>
+      <table:table-header-rows>
+       <table:table-row>
+        <table:table-cell table:style-name="Tabelle1.A1" office:value-type="string">
+         <text:p text:style-name="P2">Something</text:p>
+        </table:table-cell>
+       </table:table-row>
+      </table:table-header-rows>
+      <table:table-row>
+       <table:table-cell table:style-name="Tabelle1.A1" office:value-type="string">
+        <text:p text:style-name="P3">Important here</text:p>
+       </table:table-cell>
+      </table:table-row>
+     </table:table>
+     <text:p text:style-name="P1"/>
+    </draw:text-box>
+   </draw:frame>
+   <text:section text:style-name="Sect1" text:name="CopyA">
+    <text:p text:style-name="P9"><text:user-field-get text:name="ES_BRIEFANREDE"/></text:p>
+    <text:p text:style-name="TVS_20_Freitext"/>
+    <text:p text:style-name="TVS_20_Freitext"/>
+    <text:p text:style-name="TVS_20_Freitext"/>
+    <text:p text:style-name="TVS_20_Freitext"/>
+    <text:p text:style-name="P6">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum consequat mi quis pretium semper. Proin luctus orci ac neque venenatis, quis commodo dolor posuere. Curabitur dignissim sapien quis cursus egestas. Donec blandit auctor arcu, nec pellentesque eros molestie eget. In consectetur aliquam hendrerit. Sed cursus mauris vitae ligula pellentesque, non pellentesque urna aliquet. Fusce placerat mauris enim, nec rutrum purus semper vel. Praesent tincidunt neque eu pellentesque pharetra. Fusce pellentesque est orci.</text:p>
+    <text:p text:style-name="P6">Integer sodales tincidunt tristique. Sed a metus posuere, adipiscing nunc et, viverra odio. Donec auctor molestie sem, sit amet tristique lectus hendrerit sed. Cras sodales nisl sed orci mattis iaculis. Nunc eget dolor accumsan, pharetra risus a, vestibulum mauris. Nunc vulputate lobortis mollis. Vivamus nec tellus faucibus, tempor magna nec, facilisis felis. Donec commodo enim a vehicula pellentesque. Nullam vehicula vestibulum est vel ultricies.</text:p>
+    <text:p text:style-name="P6">Aliquam velit massa, laoreet vel leo nec, volutpat facilisis eros. Donec consequat arcu ut diam tempor luctus. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Praesent vitae lacus vel leo sodales pharetra a a nibh. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Nam luctus tempus nibh, fringilla dictum augue consectetur eget. Curabitur at ante sit amet tortor pharetra molestie eu nec ante. Mauris tincidunt, nibh eu sollicitudin molestie, dolor sapien congue tortor, a pulvinar sapien turpis sed ante. Donec nec est elementum, euismod nulla in, mollis nunc.</text:p>
+    <text:p text:style-name="TVS_20_Unsichtbar"><text:soft-page-break/><text:user-field-get text:name="IF_AUSBL_DSGVO"/><text:hidden-paragraph text:condition="ooow:IF_AUSBL_DSGVO eq &quot;1&quot;"/></text:p>
+   </text:section>
+   <text:p text:style-name="P4">Second page</text:p>
+   <text:section text:style-name="Sect1" text:name="CopyB">
+    <text:p text:style-name="P8">Page 3</text:p>
+   </text:section>
+  </office:text>
+ </office:body>
+</office:document>
\ No newline at end of file
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index 9f25b8506b29..5860cba7b4fb 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -108,6 +108,18 @@ void SwLayoutWriter::CheckRedlineFootnotesHidden()
     assertXPath(pXmlDoc, "/root/page[1]/ftncont/ftn[2]/txt[1]/Text[1]", "Portion", "mo");
 }
 
+CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testTdf156077)
+{
+    createDoc("s4_min2.fodt");
+
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Number of pages does not match!", 3, getPages());
+    xmlDocPtr pXmlDoc = parseLayoutDump();
+    assertXPath(pXmlDoc, "/root/page[1]/anchored/fly", 3);
+    assertXPath(pXmlDoc, "/root/page[2]/anchored/fly", 1);
+    // this was 0, the at-page anchored flys were not displayed
+    assertXPath(pXmlDoc, "/root/page[3]/anchored/fly", 3);
+}
+
 CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testRedlineFootnotes)
 {
     createDoc("redline_footnotes.odt");
diff --git a/sw/source/core/layout/newfrm.cxx b/sw/source/core/layout/newfrm.cxx
index 1d1f4597fcf2..39ea1c9c2bc0 100644
--- a/sw/source/core/layout/newfrm.cxx
+++ b/sw/source/core/layout/newfrm.cxx
@@ -502,6 +502,11 @@ void SwRootFrame::Init( SwFrameFormat* pFormat )
     ::InsertCnt_( pLay, pDoc, aTmp.GetIndex(), true );
     //Remove masters that haven't been replaced yet from the list.
     RemoveMasterObjs( mpDrawPage );
+
+    // tdf#156077 create all pages for at-page anchored flys now because all
+    // these flys must be attached to some page when Init() is finished
+    AssertFlyPages();
+
     if( rSettingAccess.get(DocumentSettingId::GLOBAL_DOCUMENT) )
         rFieldsAccess.UpdateRefFields();
     //b6433357: Update page fields after loading