Issue 126 - rst2pdf - Header with images + Table of contents produce a rst2pdf crash

Issue 126:	Header with images + Table of contents produce a rst2pdf crash
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Status:	Fixed
Owner:	----
Closed:	Jun 2009
Type-Defect
Priority-Medium

Reported by olivier.hervieu, Jun 02, 2009

Attached to this bug reports, you will find a valid rst file that produce a
crash of rst2pdf. 

Header without contents == No problem
Contents without header == No problem

Header + Contents == Problem :)

My Traceback is : 
Traceback (most recent call last):
  File "/usr/local/bin/rst2pdf", line 8, in <module>
    load_entry_point('rst2pdf==0.10.1', 'console_scripts', 'rst2pdf')()
  File
"/usr/local/lib/python2.6/dist-packages/rst2pdf-0.10.1-py2.6.egg/rst2pdf/createpdf.py",
line 1439, in main
    compressed=options.compressed)
  File
"/usr/local/lib/python2.6/dist-packages/rst2pdf-0.10.1-py2.6.egg/rst2pdf/createpdf.py",
line 1132, in createPdf
    pdfdoc.multiBuild(elements)
  File
"/usr/lib/python2.6/dist-packages/reportlab/platypus/doctemplate.py", line
855, in multiBuild
    self.build(tempStory, filename, canvasmaker)
  File
"/usr/lib/python2.6/dist-packages/reportlab/platypus/doctemplate.py", line
777, in build
    self.handle_flowable(flowables)
  File
"/usr/lib/python2.6/dist-packages/reportlab/platypus/doctemplate.py", line
665, in handle_flowable
    if frame.add(f, canv, trySplit=self.allowSplitting):
  File "/usr/lib/python2.6/dist-packages/reportlab/platypus/frames.py",
line 159, in _add
    w, h = flowable.wrap(aW, h)
  File "/usr/lib/python2.6/dist-packages/reportlab/platypus/flowables.py",
line 543, in wrap
    W,H = _listWrapOn(self._content,aW,self.canv,dims=dims)
  File "/usr/lib/python2.6/dist-packages/reportlab/platypus/flowables.py",
line 468, in _listWrapOn
    cframe = doct.frame = deepcopy(doct_frame)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 292, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 255, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 292, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 255, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 228, in _deepcopy_list
    y.append(deepcopy(a, memo))
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 292, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 255, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.6/copy.py", line 189, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/usr/lib/python2.6/copy.py", line 338, in _reconstruct
    state = deepcopy(state, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 255, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 292, in _deepcopy_inst
    state = deepcopy(state, memo)
  File "/usr/lib/python2.6/copy.py", line 162, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.6/copy.py", line 255, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.6/copy.py", line 188, in deepcopy
    "un(deep)copyable object of type %s" % cls)
copy.Error: un(deep)copyable object of type <type 'ImagingCore'>

rst2pdfbug.rst
758 bytes Download

Comment 1 by roberto.alsina, Jun 02, 2009

Congratulations, that is a real bug :-)
I'll take a look at it, but it looks hard to fix.

Status: Accepted

Comment 2 by roberto.alsina, Jun 02, 2009

Ok, the problem is that, when you use a TOC, reportlab does a multibuild.

When you do a multibuild, reportlab is trying to do a deepcopy of the FancyPage object.

When you have an image in the header, FancyPage.head contains a reference to an Image
flowable.

The image flowable contains a reference to an ImagingCore object.... which is not
copiable.

Solution: remove the head reference from the FancyPage object (it can just as easily
be global, for example).

I will try to fix this today, but it's not exactly trivial.

Comment 3 by roberto.alsina, Jun 02, 2009

Commited a *very* bad fix in r661. I will keep the issue open because I don't like it
at all.

Comment 4 by roberto.alsina, Jun 03, 2009

Ok, the elegant fix is way too hard. Closing.

Status: Fixed