My first guess is that you didn't try this code. For me, vec only allows field sizes that are powers of 2 (and this restriction is still in 5.8's vec docs -- the latest PM currently links to). 

Illegal number of bits in vec at ...

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- tye        

In reply to Re^2: pack/unpack 6-bit fields.(!vec) by tye
in thread pack/unpack 6 bit fields. by Anonymous Monk

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