FIX: another way to fix leaking $_. Should work perl-5.8 aka msysgit.
LOCAL: merge "no autovivification" pragma enabled

Cannot find a way yet to enable it conditionally, and have to support installation where it's not available.
So yet only merge it locally
TEST: check that command does not fail with stackrtace
Revert "TEST: check that command does not fail with stackrtace"

This reverts commit cff5fabf90d839b6262ad12b1f44d82e96ff85cf.