cannot unpack non-iterable BlockBox object in Manjaro Linux

[mgazzin]

Hello, in my x86_64 machine I did:

docker pull manjarolinux/base
docker run -it manjarolinux/base bash
# pacman -Syyu
# pacman -S python-pip pango
# pip install -U weasyprint
# weasyprint http://weasyprint.org /tmp/weasyprint-website.pdf

I am getting the following error:

WARNING: Invalid media type ' screen and (min-width: 831px) ' the whole @media rule was ignored at 1029:1.
Traceback (most recent call last):
  File "/usr/bin/weasyprint", line 8, in <module>
    sys.exit(main())
  File "/usr/lib/python3.10/site-packages/weasyprint/__main__.py", line 188, in main
    html.write_pdf(output, **kwargs)
  File "/usr/lib/python3.10/site-packages/weasyprint/__init__.py", line 183, in write_pdf
    self.render(
  File "/usr/lib/python3.10/site-packages/weasyprint/__init__.py", line 134, in render
    return Document._render(
  File "/usr/lib/python3.10/site-packages/weasyprint/document.py", line 930, in _render
    [Page(page_box) for page_box in page_boxes],
  File "/usr/lib/python3.10/site-packages/weasyprint/document.py", line 930, in <listcomp>
    [Page(page_box) for page_box in page_boxes],
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/__init__.py", line 133, in layout_document
    pages = list(make_all_pages(context, root_box, html, pages))
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/page.py", line 850, in make_all_pages
    page, resume_at = remake_page(i, context, root_box, html)
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/page.py", line 787, in remake_page
    page, resume_at, next_page = make_page(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/page.py", line 585, in make_page
    root_box, resume_at, next_page, _, _ = block_level_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 51, in block_level_layout
    return block_level_layout_switch(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 65, in block_level_layout_switch
    return block_box_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 107, in block_box_layout
    result = block_container_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 636, in block_container_layout
    next_page, new_children) = _in_flow_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 443, in _in_flow_layout
    collapsing_through) = block_level_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 51, in block_level_layout
    return block_level_layout_switch(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 65, in block_level_layout_switch
    return block_box_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 107, in block_box_layout
    result = block_container_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 636, in block_container_layout
    next_page, new_children) = _in_flow_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 443, in _in_flow_layout
    collapsing_through) = block_level_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 51, in block_level_layout
    return block_level_layout_switch(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 65, in block_level_layout_switch
    return block_box_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 107, in block_box_layout
    result = block_container_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/block.py", line 719, in block_container_layout
    absolute_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/absolute.py", line 272, in absolute_layout
    new_box, resume_at = absolute_box_layout(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/absolute.py", line 307, in absolute_box_layout
    new_box, resume_at = absolute_flex(
  File "/usr/lib/python3.10/site-packages/weasyprint/layout/absolute.py", line 234, in absolute_flex
    cb_x, cb_y, cb_width, cb_height = containing_block_sizes
TypeError: cannot unpack non-iterable BlockBox object

this is the installed version:

root@87a06f066b1f /]# weasyprint --version
/usr/lib/python3.10/site-packages/weasyprint/text/fonts.py:73: UserWarning: FontConfig: No fonts configured. Expect ugly output.
  warnings.warn(
WeasyPrint version 54.0

[grewn0uille]

Hello!
Thanks for the bug report. It’s a duplicate of #1536.