Exception in parsing cfg file

[TG1999]

Description

Please leave a brief description of the bug or feature request:

How To Reproduce

Parse this cfg file with SetupCfgHandler.

[metadata]
name = importlib_resources
author = Barry Warsaw
author_email = [email protected]
description = Read resources from Python packages
long_description = file: README.rst
url = https://github.com/python/importlib_resources
classifiers = 
	Development Status :: 5 - Production/Stable
	Intended Audience :: Developers
	License :: OSI Approved :: Apache Software License
	Programming Language :: Python :: 3
	Programming Language :: Python :: 3 :: Only
project_urls = 
	Documentation = https://importlib-resources.readthedocs.io/

[options]
packages = find_namespace:
include_package_data = true
python_requires = >=3.7
install_requires = 
	zipp >= 3.1.0; python_version < '3.10'

[options.packages.find]
exclude = 
	build*
	dist*
	docs*
	tests*

[options.extras_require]
testing = 
	pytest >= 6
	pytest-checkdocs >= 2.4
	pytest-flake8
	pytest-black >= 0.3.7; \
	python_implementation != "PyPy"
	pytest-cov
	pytest-mypy >= 0.9.1; \
	python_implementation != "PyPy"
	pytest-enabler >= 1.0.1
docs = 
	sphinx
	jaraco.packaging >= 9
	rst.linker >= 1.9

[egg_info]
tag_build = 
tag_date = 0

Got this error while parsing this file

Traceback (most recent call last):
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/parser.py", line 74, in setuptools_parse_requirements_backport
    line += next(lines)
StopIteration
File "/home/tg1999/Desktop/python-inspector/src/_packagedcode/pypi.py", line 722, in parse
    dependencies = parse_with_dparse2(
  File "/home/tg1999/Desktop/python-inspector/src/_packagedcode/pypi.py", line 1268, in parse_with_dparse2
    dep_file = dparse2.parse(content, file_name=file_name)
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/parser.py", line 256, in parse
    return dep_file.parse()
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/dependencies.py", line 139, in parse
    self.parser.parse()
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/parser.py", line 236, in parse
    self._parse_content(content)
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/parser.py", line 242, in _parse_content
    req = parse_requirement_line(line)
  File "/home/tg1999/Desktop/python-inspector/venv/lib/python3.8/site-packages/dparse2/parser.py", line 87, in parse_requirement_line
    (parsed,) = setuptools_parse_requirements_backport(line)
RuntimeError: generator raised StopIteration

Adding one more file for input

[metadata]
name = importlib_metadata
author = Jason R. Coombs
author_email = [email protected]
description = Read metadata from Python packages
long_description = file:README.rst
url = https://github.com/python/importlib_metadata
classifiers = 
	Development Status :: 5 - Production/Stable
	Intended Audience :: Developers
	License :: OSI Approved :: Apache Software License
	Programming Language :: Python :: 3
	Programming Language :: Python :: 3 :: Only

[options]
packages = find_namespace:
include_package_data = true
python_requires = >=3.7
install_requires = 
	zipp>=0.5
	typing-extensions>=3.6.4; python_version < "3.8"

[options.packages.find]
exclude = 
	build*
	dist*
	docs*
	tests*
	prepare*

[options.extras_require]
testing = 
	pytest >= 6
	pytest-checkdocs >= 2.4
	pytest-flake8
	pytest-black >= 0.3.7; \
	python_implementation != "PyPy"
	pytest-cov
	pytest-mypy >= 0.9.1; \
	python_implementation != "PyPy"
	pytest-enabler >= 1.3
	
	importlib_resources>=1.3; python_version < "3.9"
	packaging
	pyfakefs
	flufl.flake8
	pytest-perf >= 0.9.2
docs = 
	sphinx
	jaraco.packaging >= 9
	rst.linker >= 1.9
perf = 
	ipython

[options.entry_points]

[egg_info]
tag_build = 
tag_date = 0

For bug reports, it really helps us to know:

• What OS are you running on? Linux
• What version of scancode-toolkit was used to generate the scan file?
• What installation method was used to install/run scancode? source download