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Blocks.py BlockBox has no attribute index
See original GitHub issueDear WeasyPrint-Team,
one more crash reduced enough to report:
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 839
in find_earlier_page_break resume_at = (new_child.index, resume_at)
AttributeError: 'BlockBox' object has no attribute 'index'
Traceback (most recent call last):
File "I:\yRuntimes-x64-msvc2017\Python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "I:\yRuntimes-x64-msvc2017\Python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "I:\xClients\WeasyPrint\weasyprint\__main__.py", line 248, in <module>
main()
File "I:\xClients\WeasyPrint\weasyprint\__main__.py", line 239, in main
main_doc = getattr(html, 'render')(**kwargsRender)
File "I:\xClients\WeasyPrint\weasyprint\__init__.py", line 174, in render
optimize_images, font_config, counter_style, image_cache)
File "I:\xClients\WeasyPrint\weasyprint\document.py", line 401, in _render
[Page(page_box, enable_hinting) for page_box in page_boxes],
File "I:\xClients\WeasyPrint\weasyprint\document.py", line 401, in <listcomp>
[Page(page_box, enable_hinting) for page_box in page_boxes],
File "I:\xClients\WeasyPrint\weasyprint\layout\__init__.py", line 123, in layout_document
pages = list(make_all_pages(context, root_box, html, pages))
File "I:\xClients\WeasyPrint\weasyprint\layout\pages.py", line 800, in make_all_pages
page, resume_at = remake_page(i, context, root_box, html)
File "I:\xClients\WeasyPrint\weasyprint\layout\pages.py", line 739, in remake_page
page_number, page_state)
File "I:\xClients\WeasyPrint\weasyprint\layout\pages.py", line 550, in make_page
positioned_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 60, in block_level_layout
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 74, in block_level_layout_switch
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 127, in block_box_layout
absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 508, in block_container_layout
absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 60, in block_level_layout
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 74, in block_level_layout_switch
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 127, in block_box_layout
absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 508, in block_container_layout
absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 60, in block_level_layout
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 74, in block_level_layout_switch
page_is_empty, absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 127, in block_box_layout
absolute_boxes, fixed_boxes, adjoining_margins)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 553, in block_container_layout
new_children, absolute_boxes, fixed_boxes)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 825, in find_earlier_page_break
child.children, absolute_boxes, fixed_boxes)
File "I:\xClients\WeasyPrint\weasyprint\layout\blocks.py", line 839, in find_earlier_page_break
resume_at = (new_child.index, resume_at)
AttributeError: 'BlockBox' object has no attribute 'index'
<html>
<head>
<style>
.colCount2{
column-count:2;
}
.nobreak{
break-after:avoid;
}
.box{
border:1px solid black;
width:350px;
height:350px;
}
</style>
</head>
<body>
<section>
<p>A</p>
</section>
<section>
<div class="colCount2">
<div class="nobreak">
<div class="box"></div>
</div>
<div class="nobreak">
<div class="box"></div>
<p>a</p>
<p>a</p>
</div>
</div>
<div class="colCount2">
<div class="nobreak">
<div class="box"></div>
<p>a</p>
</div>
</div>
</section>
</body>
</html>
Please let me know, if I can do anything different in preparing/reducing these examples to make your life easier.
Thanks again for your efforts!
I wish you a good weekend,
Johannes
Issue Analytics
- State:
- Created 3 years ago
- Comments:5 (4 by maintainers)
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Reason to crash is the same as in #1168.
When WeasyPrint paginates a multi-column block,
columns_layoutwraps the columns into an anonymous BlockBox.When trying to find an opportunity to break a multi-column box,
find_earlier_page_breakrecurses the given children and their grandchildren. Sooner or later it will bump into such an anonymous column BlockBox which (of course) doesn’t have no index in its non-laid-out parent.Thus: AttributeError.
The solution is skipping
if child.is_columnlike we already do forchild.is_header or child.is_footer. After all we cannot break a multi-column block at an arbitrary position in an arbitrary column… that’s the job ofcolumns_layout, i.e. the multi-column block itself.@LiZe Are there more anonymous BlockBoxes without index in their non-laid-out parent lurking? Should we continue
if !hasattr(child, 'index')?@mag-chang Hi!
If you’re still interested in this issue, could you please try c35a629 and see if it fixes your problem?
Thank you!