Segfault with ex.coefficients

[rwst]

From https://groups.google.com/forum/#!topic/sage-devel/_amko6fGk64 :

sage: s = diff(function('f')(x), x) * x^2
sage: s.coefficients(x)  # Bam!

Upstream fix: pynac/pynac#276

Depends on #24262

Component: symbolics

Issue created by migration from https://trac.sagemath.org/ticket/24147

[rwst]

comment:1

Fixed in Pynac master.

[rwst]

Dependencies: pynac-0.7.13

[egourgoulhon]

comment:2

Replying to @rwst:

Fixed in Pynac master.

Thanks!

[slel]

comment:3

Upstream fix: pynac/pynac#276

[slel]

Upstream: Fixed upstream, but not in a stable release.

[slel]

Description changed:

--- 
+++ 
@@ -5,4 +5,4 @@
 sage: s.coefficients(x)  # Bam!
 ```
 
-
+Upstream fix: https://github.com/pynac/pynac/issues/276

[rwst]

Changed dependencies from pynac-0.7.13 to #24262

[rwst]

Changed upstream from Fixed upstream, but not in a stable release. to none

[EmmanuelCharpentier]

comment:5

Fixed by #24262, whose validation will allow me to give positive_review to the present ticket.

[rwst]

comment:6

This ticket needs to doctest the issue.

[rwst]

comment:7

Duplicate of #23545 (which doctests both issues).