perl – 哈希键编码：为什么我会在这里与Devel :: Peek ::转储两个不同的结果？

#!/usr/bin/env perl
use warnings;
use 5.014;
use utf8;
binmode STDOUT,':encoding(utf-8)';
use Devel::Peek;

my %hash1 = ( 'müller' => 1 );
say Dump $_ for keys %hash1;

my %hash2;
$hash2{'müller'} = 1;
say Dump $_ for keys %hash2;

输出：

SV = PV(0x753270) at 0x76d230
  REFCNT = 2
  FLAGS = (POK,pPOK,UTF8)
  PV = 0x759750 "m\303\274ller"\0 [UTF8 "m\x{fc}ller"]
  CUR = 7
  LEN = 8

SV = PV(0x753270) at 0x7d75a8
  REFCNT = 2
  FLAGS = (POK,FAKE,READONLY,pPOK)
  PV = 0x799110 "m\374ller"
  CUR = 6
  LEN = 0