Opened 12 years ago

Closed 11 years ago

#7929 closed defect (duplicate)

Pickling fails for some residue fields

Reported by: nthiery Owned by: davidloeffler
Priority: major Milestone: sage-duplicate/invalid/wontfix
Component: number fields Keywords:
Cc: Merged in:
Authors: Reviewers: David Roe
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Status badges

Description (last modified by nthiery)

Caught with #7921; please write patch on top of it to avoid conflicts. 

sage: K.<a> = NumberField(x^3-17)
sage: P = K.ideal(29).factor()[0][0]
sage: k = K.residue_field(P) # indirect doctest
sage: F = ZZ.residue_field(17)  # indirect doctest
sage: loads(dumps(k))
------------------------------------------------------------
Traceback (most recent call last):
  File "<ipython console>", line 1, in <module>
  File "sage_object.pyx", line 740, in sage.structure.sage_object.dumps (sage/structure/sage_object.c:8021)
  File "ring.pyx", line 2424, in sage.rings.ring.FiniteField.__reduce__ (sage/rings/ring.c:12853)
TypeError: 'NoneType' object is unsubscriptable

sage: loads(dumps(k.an_element()))
------------------------------------------------------------
Traceback (most recent call last):
  File "<ipython console>", line 1, in <module>
  File "sage_object.pyx", line 740, in sage.structure.sage_object.dumps (sage/structure/sage_object.c:8021)
  File "ring.pyx", line 2424, in sage.rings.ring.FiniteField.__reduce__ (sage/rings/ring.c:12853)
TypeError: 'NoneType' object is unsubscriptable

sage: loads(dumps(F))
------------------------------------------------------------
Traceback (most recent call last):
  File "<ipython console>", line 1, in <module>
  File "sage_object.pyx", line 740, in sage.structure.sage_object.dumps (sage/structure/sage_object.c:8021)
  File "ring.pyx", line 2424, in sage.rings.ring.FiniteField.__reduce__ (sage/rings/ring.c:12853)
TypeError: 'NoneType' object is unsubscriptable

sage: loads(dumps(F.an_element()))
------------------------------------------------------------
Traceback (most recent call last):
  File "<ipython console>", line 1, in <module>
  File "sage_object.pyx", line 740, in sage.structure.sage_object.dumps (sage/structure/sage_object.c:8021)
  File "ring.pyx", line 2424, in sage.rings.ring.FiniteField.__reduce__ (sage/rings/ring.c:12853)
TypeError: 'NoneType' object is unsubscriptable

Change History (5)

comment:1 Changed 12 years ago by nthiery

  • Description modified (diff)

comment:2 Changed 11 years ago by roed

  • Milestone set to sage-duplicate/invalid/wontfix

This works in 4.7.2.

comment:3 Changed 11 years ago by roed

  • Status changed from new to needs_review

comment:4 Changed 11 years ago by roed

  • Status changed from needs_review to positive_review

comment:5 Changed 11 years ago by jdemeyer

  • Resolution set to duplicate
  • Reviewers set to David Roe
  • Status changed from positive_review to closed
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