Don't crash for regexps > 19 characters.
Don't crash for regexps > 19 characters.

R=r
APPROVED=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=34216
CL=34220

npe9/noahevans-go9,rdp/rogerpack2005-golang,webfd/go-zh,bryanxu/go-zh,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,Triskite/willstone-goclone,d0f/go-zh,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,webfd/go-zh,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,bryanxu/go-zh,d0f/go-zh,scirelli/scirelli-go,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,webfd/go-zh,bryanxu/go-zh,mhennings/marcohennings-go,Triskite/willstone-goclone,scirelli/scirelli-go,rdp/rogerpack2005-golang,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,webfd/go-zh,bryanxu/go-zh,scirelli/scirelli-go,bryanxu/go-zh,npe9/noahevans-go9,rdp/rogerpack2005-golang,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,d0f/go-zh,webfd/go-zh,webfd/go-zh,Triskite/willstone-goclone,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,scirelli/scirelli-go,mhennings/marcohennings-go,rflanagan/reginaldflanagan-project1,scirelli/scirelli-go,sanjosh/sanjos100-tipc,bryanxu/go-zh,webfd/go-zh,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,rflanagan/reginaldflanagan-project1,sanjosh/sanjos100-tipc,mhennings/marcohennings-go,mhennings/marcohennings-go,bryanxu/go-zh,webfd/go-zh,d0f/go-zh,sanjosh/sanjos100-tipc,d0f/go-zh,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,rdp/rogerpack2005-golang,npe9/noahevans-go9,glycerine/jeaten-go-arrayof-structof,rdp/rogerpack2005-golang,d0f/go-zh,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,sanjosh/sanjos100-tipc,d0f/go-zh,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,npe9/noahevans-go9,Triskite/willstone-goclone,d0f/go-zh,mhennings/marcohennings-go,npe9/noahevans-go9,sanjosh/sanjos100-tipc