Partitions(-1).list() goes into infinte recursion

[mantepse]

Currently Partitions only checks whether its argument is an integer, but iterating through Partitions(-1) fails. It now creates an empty list.

sage: Partitions(-1).list()
[]

Apply attachment: 12663-partitions_iter_fix-ts-rebased.patch

CC: @sdenton4

Component: combinatorics

Keywords: Partitions, corner case, days38

Author: Travis Scrimshaw

Reviewer: Tom Denton

Merged: sage-5.1.beta1

Issue created by migration from https://trac.sagemath.org/ticket/12663

[tscrim]

Changed author from Martin Rubey to Travis Scrimshaw

[tscrim]

Reviewer: Tom Denton

[jdemeyer]

comment:6

The commit message of this patch should be changed (using hg qrefresh -e for example):

1. The "[mq] ..." should not be there.
2. It's better not to have one long line, line wrapping is recommended. But make sure the first line (displayed by hg log) makes sense just by itself.

[tscrim]

comment:7

Attachment: trac_12663-partitions_iter_fix-ts.patch.gz

Fixed.

[tscrim]

Changed keywords from Partitions, corner case to Partitions, corner case, days38

[jdemeyer]

Merged: sage-5.1.beta1

[jdemeyer]

Attachment: 12663-partitions_iter_fix-ts-rebased.patch.gz