Doctest: Complex arithmetic/exponentiation hang (or very slow)

[aerusso]

Debian unstable (either downloaded directly or from the Debian repositories), running 8.1. Trying to multiply

(1+exp(i*pi/4))exp(ipi/4)

does not terminate (in a reasonable amount of time)

exp(ipi/4)+exp(ipi/4)exp(ipi/4)

on the other hand, resolves fine.

Sorry if this is a duplicate bug.

Depends on #24838
Depends on #25251

CC: @rwst

Component: algebra

Keywords: days94

Author: Ralf Stephan

Branch/Commit: 8b25b1c

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/25252

[egourgoulhon]

comment:1

It's OK in Sage 8.1.beta5 and all previous versions of Sage:

sage: (1+exp(i*pi/4))*exp(i*pi/4) 
-(1/4*I + 1/4)*sqrt(2)*(-(I + 1)*sqrt(2) - 2)

It hangs in Sage 8.1.beta8. So the bug was introduced between Sage 8.1.beta6 and 8.1.beta8.

[rwst]

comment:3

Fixed in pynac-0.7.17 (#24838). See also #24768. This ticket should add a doctest.

[rwst]

Dependencies: #24838

[rwst]

Branch: u/rws/25252

[rwst]

Changed dependencies from #24838 to #24838, #25251

[rwst]

New commits:

495e9f4	25251: doctest
ee8bff4	25252: doctest25252: doctest25252: doctest25252: doctest25252:

[rwst]

Author: Ralf Stephan

[rwst]

Commit: ee8bff4