Any operation that queries the size does the same thing:

Not so. 
>perl -MDevel::Peek -le"my @a = qw(a b c); print @a-1; Dump \@a,1"
2
SV = RV(0x238c60) at 0x238c54
  REFCNT = 1
  FLAGS = (TEMP,ROK)
  RV = 0x182a22c
  SV = PVAV(0x239a4c) at 0x182a22c
    REFCNT = 2
    FLAGS = (PADMY)
    ARRAY = 0x182521c
    FILL = 2
    MAX = 3
    ARYLEN = 0x0
    FLAGS = (REAL)

[download]

If it's a bug, it's not attributable to Devel::Size.

If it's a bug that reading $#a adds magic to @a, then that's not attributable to D::S.

The bug in D::S is that it should be using the method that doesn't add magic.

In reply to Re^5: perl5.10 Devel::Size behaviour changed? (bug report) by ikegami
in thread perl5.10 Devel::Size behaviour changed? by sang1986

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