New submission from Hanno Boeck <[email protected]>:
I noticed that the HTMLParser will raise an exception on some inputs.
I'm not sure what the expectations here are, but given that real-world HTML
often contains all kinds of broken content I would assume an HTMLParser to
always try to parse a document and not be interrupted by an exception if an
error occurs.
Here's a minified example:
#!/usr/bin/env python3
import html.parser
html.parser.HTMLParser().feed("<![\n")
However I actually stepped upon HTML failing on a real webpage:
https://kafanews.com/
Exception of minified example:
Traceback (most recent call last):
File "./foo.py", line 5, in <module>
html.parser.HTMLParser().feed("<![\n")
File "/usr/lib64/python3.6/html/parser.py", line 111, in feed
self.goahead(0)
File "/usr/lib64/python3.6/html/parser.py", line 179, in goahead
k = self.parse_html_declaration(i)
File "/usr/lib64/python3.6/html/parser.py", line 264, in
parse_html_declaration
return self.parse_marked_section(i)
File "/usr/lib64/python3.6/_markupbase.py", line 149, in parse_marked_section
sectName, j = self._scan_name( i+3, i )
File "/usr/lib64/python3.6/_markupbase.py", line 391, in _scan_name
% rawdata[declstartpos:declstartpos+20])
File "/usr/lib64/python3.6/_markupbase.py", line 34, in error
"subclasses of ParserBase must override error()")
NotImplementedError: subclasses of ParserBase must override error()
----------
components: Library (Lib)
messages: 312363
nosy: hanno
priority: normal
severity: normal
status: open
title: HTMLParser raises exception on some inputs
type: behavior
versions: Python 3.6
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Python tracker <[email protected]>
<https://bugs.python.org/issue32876>
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