Build(deps-dev): Bump flake8-bugbear from 21.4.3 to 21.9.1 (#468)

* Build(deps-dev): Bump flake8-bugbear from 21.4.3 to 21.9.1

Bumps [flake8-bugbear](https://github.com/PyCQA/flake8-bugbear) from 21.4.3 to 21.9.1.
- [Release notes](https://github.com/PyCQA/flake8-bugbear/releases)
- [Commits](PyCQA/flake8-bugbear@21.4.3...21.9.1)

---
updated-dependencies:
- dependency-name: flake8-bugbear
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix warning B904 (exception chaining)

* Update poetry.lock content hash

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Claudio Jolowicz <mail@claudiojolowicz.com>

pyproject.toml

@@ -34,7 +34,7 @@ pre-commit = "^2.15.0"
 flake8 = "^4.0.1"
 black = "^20.8b1"
 flake8-bandit = "^2.1.2"
-flake8-bugbear = "^21.4.3"
+flake8-bugbear = "^21.9.1"
 flake8-docstrings = "^1.6.0"
 flake8-rst-docstrings = "^0.2.3"
 pep8-naming = "^0.12.1"

src/nox_poetry/sessions.py

@@ -67,7 +67,7 @@ def to_constraint(requirement_string: str, line: int) -> Optional[str]:
     try:
         requirement = Requirement(requirement_string)
     except InvalidRequirement as error:
-        raise RuntimeError(f"line {line}: {requirement_string!r}: {error}")
+        raise RuntimeError(f"line {line}: {requirement_string!r}: {error}") from error
 
     if not (requirement.name and requirement.specifier):
         return None

tests/functional/conftest.py

@@ -104,7 +104,7 @@ def _run_nox(project: Project, *nox_args: str) -> CompletedProcess:
             env=env,
         )
     except subprocess.CalledProcessError as error:
-        raise RuntimeError(f"{error}\n{error.stderr}")
+        raise RuntimeError(f"{error}\n{error.stderr}") from None
 
 
 SessionFunction = Callable[..., Any]