HTMLPullParser doesn't return events if feed terminates within an attribute value

[abdul monim]

Consider the following script

from lxml import etree

def print_elements(parser):
    print(list(element for event, element in parser.read_events()))

def this_works():
    parser = etree.HTMLPullParser()
    parser.feed('<span class="helooooooooooooo">Welcome</span>')
    print_elements(parser)

def this_also_works():
    parser = etree.HTMLPullParser()
    parser.feed('<span class="helooooooooooooo"')
    parser.feed(">Welcome</span>")
    print_elements(parser)

def this_fails():
    parser = etree.HTMLPullParser()
    parser.feed('<span class="heloooooo')
    parser.feed('ooooooo">Welcome</span>')
    print_elements(parser)

this_works()
this_also_works()
this_fails()

Output:

[<Element span at 0x103cf15c0>]
[<Element span at 0x103cf1c00>]
[]

The last one does not return any event or element as feed 1 ended within quoted attribute value.

Python : sys.version_info(major=3, minor=10, micro=5, releaselevel='final', serial=0)
lxml.etree : (4, 9, 1, 0)
libxml used : (2, 9, 14)
libxml compiled : (2, 9, 14)
libxslt used : (1, 1, 34)
libxslt compiled : (1, 1, 34)