Breakpoint in hypothesis test is not hit

[tekumara]

In VS Code a breakpoint on the assert line will not be hit, eg:

from statistics import mean

from hypothesis import given
from hypothesis import strategies as st


@given(st.lists(st.floats(allow_nan=False, allow_infinity=False), min_size=1))
def test_mean(xs):
    print("test_mean")
    assert min(xs) <= mean(xs) <= max(xs)

Hypothesis: 6.26.1
Vscode: 1.64.0 (commit 5554b12acf27056905806867f251c859323ff7e9)
Debugpy: 1.5.1
Python: 3.9.7
Pytest: 6.2.5
OS: Darwin x64 21.3.0

See tekumara/hypothesis-debug-vscode for a full reproduction.

[tekumara]

If export PYDEVD_USE_FRAME_EVAL=1 is set the breakpoint will be hit.

If a breakpoint() line is added, it will be hit.

[gramster]

I could not get your repro code to work, but do you have the right settings in VS Code?

[tekumara]

I'm using "justMyCode": false and

[karthiknadig]

@tekumara Can you share your launch.json?

[tekumara]

This is it here: launch.json

[karthiknadig]

@tekumara Thanks for the details, I am able to repro the bug. Looks like removing the given decorator it works as expected, but with the given decorator it does not.

/cc @fabioz
Potentially related: #709
related: #215

[fabioz]

I'm investigating.

As a note, when running under the debugger, programmatically using breakpoint() will stop at the proper place (but I still don't know why it's not working in the first place...)