optional doctest failure -- breakage in the sage<-->magma interface

[williamstein]

sage -t -long --optional devel/sage/sage/rings/rational.pyx
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/rings/rational.pyx", line 3087:
    sage: magma(3/1).Type()             # optional
Expected:
    FldRatElt
Got:
    RngIntElt
**********************************************************************
1 items had failures:
   1 of   5 in __main__.example_84
***Test Failed*** 1 failures.

---

Apply only attachment: trac_6329.2.patch to the Sage library.

Component: interfaces

Keywords: sd32

Author: Mariah Lenox, William Stein

Reviewer: Mike Hansen

Merged: sage-4.7.2.alpha3

Issue created by migration from https://trac.sagemath.org/ticket/6329

[williamstein]

comment:1

More failures:

sage -t -long --optional devel/sage/sage/schemes/hyperelliptic_curves/hyperelliptic_g2_generic.py
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/schemes/hyperelliptic_curves/hyperelliptic_g2_generic.py", line 218:
    sage: magma(HyperellipticCurve(f)).IgusaClebschInvariants() # optional - magma
Expected:
    [ 0, -2048/375, -4096/25, -4881645568/84375 ]
Got:
    [ -640, -20480, 1310720, 52160364544 ]
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/schemes/hyperelliptic_curves/hyperelliptic_g2_generic.py", line 220:
    sage: magma(HyperellipticCurve(f(2*x))).IgusaClebschInvariants() # optional - magma
Expected:
    [ 0, -8388608/375, -1073741824/25, -5241627016305836032/84375 ]
Got:
    [ -40960, -83886080, 343597383680, 56006764965979488256 ]
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/schemes/hyperelliptic_curves/hyperelliptic_g2_generic.py", line 222:
    sage: magma(HyperellipticCurve(f, x)).IgusaClebschInvariants() # optional - magma
Expected:
    [ -8/15, 17504/5625, -23162896/140625, -420832861216768/7119140625 ]
Got:
    [ -640, 17920, -1966656, 52409511936 ]
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/schemes/hyperelliptic_curves/hyperelliptic_g2_generic.py", line 224:
    sage: magma(HyperellipticCurve(f(2*x), 2*x)).IgusaClebschInvariants() # optional - magma
Expected:
    [ -512/15, 71696384/5625, -6072014209024/140625, -451865844002031331704832/7119140625 ]
Got:
    [ -40960, 73400320, -515547070464, 56274284941110411264 ]
**********************************************************************
1 items had failures:
   4 of  12 in __main__.example_7
***Test Failed*** 4 failures.

[williamstein]

comment:2

More failures:

sage -t -long --optional devel/sage/sage/interfaces/magma.py
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 856:
    sage: magma.attach('%s/data/extcode/magma/sage/basic.m'%Sage_ROOT)    # optional - magma
Exception raised:
    Traceback (most recent call last):
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_20[2]>", line 1, in <module>
        magma.attach('%s/data/extcode/magma/sage/basic.m'%Sage_ROOT)    # optional - magma###line 856:
    sage: magma.attach('%s/data/extcode/magma/sage/basic.m'%Sage_ROOT)    # optional - magma
    NameError: name 'Sage_ROOT' is not defined
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 860:
    sage: magma.attach('%s/data/extcode/magma/sage/basic2.m'%Sage_ROOT)     # optional - magma
Expected:
    Traceback (most recent call last):
    ...
    RuntimeError: Error evaluating Magma code...
Got:
    Traceback (most recent call last):
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/scratch/wstein/build/sage-4.0.2.alpha3/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_20[3]>", line 1, in <module>
        magma.attach('%s/data/extcode/magma/sage/basic2.m'%Sage_ROOT)     # optional - magma###line 860:
    sage: magma.attach('%s/data/extcode/magma/sage/basic2.m'%Sage_ROOT)     # optional - magma
    NameError: name 'Sage_ROOT' is not defined
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 917:
    sage: print magma.load(SAGE_TMP + 'a.m')      # optional - magma
Expected:
    Loading ".../.sage//temp/.../a.m"
    hi
Got:
    Loading "/scratch/wstein/sage//temp/sage.math.washington.edu/31604/a.m"
    hi
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 2148:
    sage: magma.eval('R<x> := PolynomialRing(RationalField()); f := (x-17/2)^3;')     # optional - magma
Expected:
    "
Got:
    ''
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 2160:
    sage: magma.eval('K<a> := CyclotomicField(11)')       # optional - magma
Expected:
    "
Got:
    ''
**********************************************************************
File "/scratch/wstein/build/sage-4.0.2.alpha3/devel/sage-main/sage/interfaces/magma.py", line 463:
    sage: magma.eval("a := %s;"%(10^10000))    # optional - magma
Expected:
    "
Got:
    ''
**********************************************************************
4 items had failures:
   2 of   4 in __main__.example_20
   1 of   5 in __main__.example_22
   2 of  28 in __main__.example_64
   1 of   4 in __main__.example_9
***Test Failed*** 6 failures.
For whitespace errors, see the file /home/wstein/build/sage-4.0.2.alpha3/tmp/.doctest_magma.py
	 [32.9 s]

[sagetrac-mariah]

Attachment: trac_6329.patch.gz

[sagetrac-mariah]

comment:3

[attachment: trac_6329.patch] corrects the test output in the problem in the description. The Got output is correct - there is not a breakage in the sage<-->magma interface. 'magma(3/1)' returns the integer '3' (after coercion), so Type() returns that
the value is an integer.

The other two reports of failures are no longer valid, as they seem to already be fixed in sage-4.7.rc4.

[sagetrac-mariah]

Author: Mariah Lenox