hairpin over bar line and over end of line

[Paul Scott]

Probably a simple answer but how do I get a crescendo in this example to 
continue to the next line?

\version "2.25.16"
\fixed c' {
  \override Hairpin.to-barline = ##f
  a2\< b g4\! r4 r2 %This is what I  want any cresc., etc. to do
  a2\< b \break
  g4\! r4 r2
}

TIA,

Paul