with bcp14 option, it crashes instead of giving useful output #1
Description
When running rfclint -n --bcp14 --no-spell --no-xml --no-abnf --no-dup-detection (as a script called checkbcp14), it crashes when <bcp14> tags are missing, rather than giving output to point out the missing element.
Looks like a similar crash, whether the input contains a "MUST", "MUST NOT", "MAY" (or other keyword from BCP 14) that is missing the <bcp14>. Previously, it gave output such as:
file.xml:886: bcp14 text 'MAY' found without bcp14 tag around it
Sample input: https://www.rfc-editor.org/v3test/test9229.xml
(missing tags around "MUST" on line 289)
% rfclint -n --bcp14 --no-spell --no-xml --no-abnf --no-dup-detection test9229.xml
Traceback (most recent call last):
File "/usr/bin/rfclint", line 8, in <module>
sys.exit(main())
File "/usr/lib/python3.6/site-packages/rfclint/run.py", line 355, in main
lang2119.processTree(xmlrfc.tree.getroot())
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 71, in processTree
self.processTree(node)
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 71, in processTree
self.processTree(node)
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 71, in processTree
self.processTree(node)
[Previous line repeated 2 more times]
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 69, in processTree
self.checkTree(tree)
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 117, in checkTree
self.checkTree(node)
File "/usr/lib/python3.6/site-packages/rfclint/must.py", line 111, in checkTree
xx = self.bcp14_re.finditer(tree.text)
TypeError: expected string or bytes-like object
Sample input: https://www.rfc-editor.org/v3test/test9143.xml
(missing tags around "MUST NOT" on line 1720)
yields same Traceback.