0.8.5.19:

        * Fix PFD bugs MISC.100, 102, 105, 107, 112;
        ... IR1-MERGE-CASTS: do not put merge asserted type
            contradicting the derived one;
        ... IR1-OPTIMIZE-COMBINATION: try terminate block after
            PROPAGATE-FUN-CHANGE;
        * FLUSH-DEAD-CODE: if the block is split under us, restart.