[perl #127865] Throwing a control exception within Lock.protect causes [LTA] locking behavior

[Jan-Olof Hendig via RT]

Seems to work fine, on my 32 bit VM, with 'This is Rakudo version 
2017.09-348-g830084430 built on MoarVM version 2017.09.1-575-gd4e230a69'