Bug in simplify_hypergeometric()

[rwst]

sage: hypergeometric((3/4, 1/4), (5/4,), -I).simplify_hypergeometric()
...
TypeError: ECL says: Error executing code in Maxima: sign: argument cannot be imaginary; found %i

Upstream: Not yet reported upstream; Will do shortly.

Component: calculus

Issue created by migration from https://trac.sagemath.org/ticket/22495

[fchapoton]

Description changed:

--- 
+++ 
@@ -2,6 +2,6 @@
 ```
 sage: hypergeometric((3/4, 1/4), (5/4,), -I).simplify_hypergeometric()
 ...
-TypeError: ECL says: Error executing code in Maxima: 
+TypeError: ECL says: Error executing code in Maxima: sign: argument cannot be imaginary; found %i
 ```
 

[dimpase]

comment:2

still not fixed in 9.5.beta7