> perl -de 1
Default die handler restored.

Loading DB routines from perl5db.pl version 1.07
Editor support available.

Enter h or `h h' for help, or `perldoc perldebug' for more help.

main::(-e:1):   1
  DB<1> $x = 'c:\tab'

  DB<2> p $x
c:\tab
  DB<3> $x = "c:\tab"

  DB<4> p $x
c:      ab
  DB<5> q