#15303: Coercion discovery fails to be transitive
-------------------------------------+-------------------------------------
       Reporter:  nbruin             |        Owner:
           Type:  defect             |       Status:  needs_review
       Priority:  major              |    Milestone:  sage-6.0
      Component:  coercion           |   Resolution:
       Keywords:                     |    Merged in:
        Authors:  Simon King         |    Reviewers:
Report Upstream:  N/A                |  Work issues:  Crash in permgroup.py
         Branch:                     |       Commit:
  u/SimonKing/ticket/15303           |  528a03535447d67f04dc16d0a22cc38def54f9f1
   Dependencies:  #14711, #15329,    |     Stopgaps:
  #15331                             |
-------------------------------------+-------------------------------------

Comment (by SimonKing):

 Replying to [comment:109 mmezzarobba]:
 > {{{
 > git fetch trac u/mmezzarobba/ticket/15303
 > git checkout u/mmezzarobba/ticket/15303 -m mybranch
 > }}}
 > (or `git merge --ff-only u/mmezzarobba/ticket/15303` if you are already
 on your ticket branch and want to add the merge commit to that branch)
 should work.

 The fetch command worked. However, the rest of it didn't.
 {{{
 king@linux-etl7:~/Sage/git/sage> git fetch trac u/mmezzarobba/ticket/15303
 Enter passphrase for key '/home/king/.ssh/id_rsa':
 remote: Counting objects: 161, done.
 remote: Compressing objects: 100% (55/55), done.
 remote: Total 55 (delta 53), reused 0 (delta 0)
 Unpacking objects: 100% (55/55), done.
 Von ssh://trac.sagemath.org:2222/sage
  * branch            u/mmezzarobba/ticket/15303 -> FETCH_HEAD
 king@linux-etl7:~/Sage/git/sage> git merge --ff-only
 u/mmezzarobba/ticket/15303
 fatal: u/mmezzarobba/ticket/15303 - nichts was wir zusammenführen können
 king@linux-etl7:~/Sage/git/sage> git checkout u/mmezzarobba/ticket/15303
 -m ticket/15303mezzarobba
 error: pathspec 'u/mmezzarobba/ticket/15303' did not match any file(s)
 known to git.
 error: pathspec 'ticket/15303mezzarobba' did not match any file(s) known
 to git.
 }}}

 However, since apparently git decided to assign your branch to FETCH_HEAD,
 `git merge --ff-only FETCH_HEAD` seems to work.

--
Ticket URL: <http://trac.sagemath.org/ticket/15303#comment:110>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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