Describe the bug
If a function's return type annotation is split over multiple lines, the default exclusion rule for functions containing only ... does not match.
To Reproduce
example.py:
from typing import Protocol
class C:
def f() -> dict[
str, str
]: ...$ coverage erase
$ coverage run --branch -m example
$ coverage report --fail-under=100 --show-missing
Name Stmts Miss Branch BrPart Cover Missing
--------------------------------------------------------
example.py 3 0 2 1 80% 4->exit
--------------------------------------------------------
TOTAL 3 0 2 1 80%
Coverage failure: total of 80 is less than fail-under=100
N.B. This example is a little contrived, but many formatters (e.g. ruff) will format functions like this if the annotation is too long.
$ python --version --version
Python 3.14.5 (main, May 10 2026, 10:21:34) [Clang 21.0.0 (clang-2100.0.123.102)]
$ coverage --version
Coverage.py, version 7.14.1 with C extension
$ uv pip freeze
Using Python 3.14.5 environment at: venv
ast-serialize==0.5.0
coverage==7.14.1
librt==0.11.0
markdown-it-py==4.2.0
mdurl==0.1.2
mypy==2.1.0
mypy-extensions==1.1.0
pathspec==1.1.1
pip==26.1.1
pygments==2.20.0
rich==15.0.0
typing-extensions==4.15.0
Expected behavior
We expect the function to be excluded because it only contains ellipsis.
We believe this is because the regexp used to match functions containing only ellipsis expects the return type annotation to be on one line:
|
r"^\s*(((async )?def .*?)?\)(\s*->.*?)?:\s*)?\.\.\.\s*(#|$)", |
Potentially related issues: #1616, #2112
Describe the bug
If a function's return type annotation is split over multiple lines, the default exclusion rule for functions containing only
...does not match.To Reproduce
example.py:N.B. This example is a little contrived, but many formatters (e.g.
ruff) will format functions like this if the annotation is too long.Expected behavior
We expect the function to be excluded because it only contains ellipsis.
We believe this is because the regexp used to match functions containing only ellipsis expects the return type annotation to be on one line:
coveragepy/coverage/config.py
Line 152 in 295b0b1
Potentially related issues: #1616, #2112