Fix: current on node calls that had more than one output were not handled properly.

such as in the equation
 o1,o2 = current (n(x,y,z));
5 jobs for opam-release in 1 minute and 30 seconds (queued for 2 seconds)
Name Stage Failure
build Build

The packages you requested declare the following system dependencies. Please make sure they are installed before retrying:
libipc-system-simple-perl libstring-shellquote-perl

The former state can be restored with:
opam switch import "/home/opam/.opam/4.10/.opam-switch/backup/state-20210712152907.export"
Cleaning up file based variables
ERROR: Job failed: exit code 1