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>perl -MDevel::Peek -e"my $x='abcdef'; Dump($x); substr($x,0,1)=''; Du
+mp($x);"
SV = PV(0x226104) at 0x2252e8
...
  PV = 0x182ca65 ( "a" . ) "bcdef"\0
  CUR = 5
  LEN = 7