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perl -C63 -MDevel::Peek -Mutf8 -le '$_="(\x{5fcd} Guimarăes)"; Dump($_
+); print length($_); print'
SV = PV(0x8154b00) at 0x8153bd4
...
  CUR = 16
  LEN = 20
13

perl -C63 -MDevel::Peek -Mutf8 -MUnicode::Normalize -le '$_="(\x{5fcd}
+ Guimarăes)"; $_ = NFD $_; Dump($_); print length($_); print'
SV = PV(0x8154b00) at 0x8153bd4
...
  CUR = 17
  LEN = 20
14

perl -C63 -MDevel::Peek -Mutf8 -mText::CharWidth=mbswidth -le '$_="(\x
+{5fcd} Guimarăes)"; Dump($_); print mbswidth($_); print'
SV = PV(0x8154b00) at 0x8153bd4
...
  CUR = 16
  LEN = 20
14

perl -C63 -MDevel::Peek -Mutf8 -mEncode=encode_utf8 -le '$_="(\x{5fcd}
+ Guimarăes)"; Dump($_); print length(encode_utf8 $_)'
SV = PV(0x8154b00) at 0x8153bd4
...
  CUR = 16
  LEN = 20
16