Error in write_pdf after Document.copy with duplicate page

[ewingrj]

This is a follow up on #880

It appears that this is caused when duplicating a page within a document.

Here is a script to reproduce:

#!/usr/bin/env python
from weasyprint import HTML

if __name__ == "__main__":
    doc = HTML(string='''
    <style>
    h2 {
        margin-top: 8px;
        margin-bottom: 8px;
    }

    table.items {
        border-collapse: collapse;
        color: #333;
        width: 75%;
    }

    .items tr:nth-child(even) {
        background: #eee;
    }

    .items tr:first-child {
        background: white;
    }

    .items td, th {
        border: 1px solid #ccc;
        padding: 0.5em;
    }

    .items th {
        border: none;
        text-align: center;
    }

    .items tbody {
        border-bottom: 3px solid black;
    }
</style>



<table style="border: none; width: 100%; margin-bottom: 0">
    <tr>
        <td>Order ID: 3529</td>
        <td style="float:right;">Oct. 24, 2019, 12:01 a.m.</td>
    </tr>
</table>

<h2>Your Details</h2>
<table style="width: 100%;">
    
        <tr>
            
                <td style="padding: 5px; font-weight: 600">Name:&nbsp;&nbsp;&nbsp;</td>
                <td style="padding: 5px;">Name Here</td>
            
        </tr>
    
        <tr>
            
                <td style="padding: 5px; font-weight: 600">Phone:&nbsp;&nbsp;&nbsp;</td>
                <td style="padding: 5px;">999-999-9999</td>
            
                <td style="padding: 5px; font-weight: 600">Alt. Phone:&nbsp;&nbsp;&nbsp;</td>
                <td style="padding: 5px;"></td>
            
        </tr>
    
    <tr>
        <td style="padding: 5px; font-weight: 600">Drop Site</td>
        <td style="padding: 5px">xxxxxxxxx</td>
    </tr>
    
</table>

<h2>Items Ordered</h2>
<table class="items">
    <tr>
        <th>Item</th>
        <th>Qty</th>
        <th>Packed</th>
    </tr>

    
        <tbody>
            
                <tr>
                    <td>xxxxxx</td>
                    <td>1</td>
                    <td><input type="checkbox"/></td>
                </tr>
            
        </tbody>
    
</table>
    ''').render()

    doc = doc.copy(doc.pages + doc.pages)
    doc.write_pdf('example.pdf')

[Tontyna]

Minimal snippet to reproduce:

<input type="checkbox">

This, like #991, is an effect of StackingContext.from_page() manipulating the original page box tree.

Original tree:

<PageBox PageType(side='right', blank=False, first=True, index=0, name='')>
  <BlockBox html>
    <BlockBox body>
      <LineBox body>
        <InlineBlockBox input>

Manipulated tree:

<PageBox PageType(side='right', blank=False, first=True, index=0, name='')>
  <BlockBox html>
    <BlockBox body>
      <LineBox body>
        <weasyprint.stacking.StackingContext object at 0x00000000051BF780>

No problem unless the tree is rendered twice.

[chickendude]

(I believe) i've been hit with this issue as well as i'm trying to create a version of the document with the title page and another without it:

doc.copy(pages=book).write_pdf(target=book_file)
doc.copy(pages=book[1:]).write_pdf(target=book_no_cover_file)

The first pdf is created, the second fails: "'StackingContext' object has no attribute 'style'"

[liZe]

This bug has been fixed in a previous version of WeasyPrint.