Hypergeom failure

[Kevin Acres <research@research-systems.com>]

>   
>                       GP/PARI CALCULATOR Version 2.12.0 (development git-6f9379e35)
>                         amd64 running linux (x86-64/GMP-6.0.0 kernel) 64-bit version
>                           compiled: Oct 11 2018, gcc version 4.4.5 (Debian 4.4.5-8)
>                                           threading engine: pthread
>                                (readline v6.1 enabled, extended help enabled)
> 
> ? allocatemem(8*10^9);
>   ***   Warning: new stack size = 8000000000 (7629.395 Mbytes).
> ? default(realprecision,1200)
> ? hypergeom([ 1/2, 2/3, 2/3, 5/6],[ 7/6, 7/6, 4/3],1)
>   ***   at top-level: hypergeom([1/2,2/3,2/3,5/6],[7/6,7/6,4/3],1)
>   ***                 ^--------------------------------------------
>   *** hypergeom: bug in gerepile, significant pointers lost, please report.
>