failing internet test integration

[kcrisman]

From this sage-devel post:

sage -t --long src/sage/symbolic/integration/external.py
**********************************************************************
File "src/sage/symbolic/integration/external.py", line 91, in sage.symbolic.integration.external.mma_free_integrator
Failed example:
    integral(sin(y)^2, y, algorithm='mathematica_free') # optional - internet
Expected:
    1/2*y - 1/4*sin(2*y)
Got:
    -1/2*cos(y)*sin(y) + 1/2*y
**********************************************************************
1 item had failures:
   1 of   7 in sage.symbolic.integration.external.mma_free_integrator
    8 fricas tests not run
    0 tests not run because we ran out of time
    [36 tests, 1 failure, 20.70 s]

Part of #25536

CC: @seblabbe

Component: interfaces

Author: Sébastien Labbé

Branch/Commit: 9afd640

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/29578

[seblabbe]

Branch: u/slabbe/29578

[seblabbe]

Commit: 3fb34f4

[seblabbe]

New commits:

3fb34f4

29578: fixing internet doctest intermitent error

[fchapoton]

Author: Sébastien Labbé

[fchapoton]

Reviewer: Frédéric Chapoton

[fchapoton]

comment:2

ok

[vbraun]

comment:3

I'm getting

sage -t --long --warn-long 35.3 src/sage/symbolic/integration/external.py
**********************************************************************
File "src/sage/symbolic/integration/external.py", line 92, in sage.symbolic.integration.external.mma_free_integrator
Failed example:
    result.simplify_trig()
Exception raised:
    Traceback (most recent call last):
      File "/home/release/Sage/local/lib/python3.7/site-packages/sage/doctest/forker.py", line 681, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/home/release/Sage/local/lib/python3.7/site-packages/sage/doctest/forker.py", line 1123, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.symbolic.integration.external.mma_free_integrator[1]>", line 1, in <module>
        result.simplify_trig()
    NameError: name 'result' is not defined
**********************************************************************
1 item had failures:
   1 of   3 in sage.symbolic.integration.external.mma_free_integrator
    [22 tests, 1 failure, 1.36 s]
----------------------------------------------------------------------
sage -t --long --warn-long 35.3 src/sage/symbolic/integration/external.py  # 1 doctest failed
----------------------------------------------------------------------

[sagetrac-git]

Changed commit from 3fb34f4 to 9afd640

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

9afd640

29578: forgot optional tag internet

[seblabbe]

comment:5

Oups, excuse me Volker, my fault.

[fchapoton]

comment:6

ok, good now ; mea culpa, ich auch

[vbraun]

Changed branch from u/slabbe/29578 to 9afd640