[MacPorts] #61041: icu @67.1_2: ld: duplicate symbol icu_67::number::NumberFormatterSettings<icu_67::number::UnlocalizedNumberFormatter>::copyErrorTo(UErrorCode&) const in number_skeletons.o and number_fluent.o

[MacPorts]

#61041: icu @67.1_2: ld: duplicate symbol
icu_67::number::NumberFormatterSettings<icu_67::number::UnlocalizedNumberFormatter>::copyErrorTo(UErrorCode&)
const in number_skeletons.o and number_fluent.o
---------------------+---------------------------
  Reporter:  kencu   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  tiger leopard
      Port:  icu     |
---------------------+---------------------------

Comment (by rmottola):

 I found this reference bug in ICU

 [https://unicode-org.atlassian.net/browse/ICU-20455]

 However, in the suggested file I don't find template classes, but direct
 implementations, so I could not add any external keyword (even if the
 article you mention suggests extern templates are useless/ignored)

 so... I just asked unicode, let's see [https://unicode-
 org.atlassian.net/browse/ICU-21439]

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Ticket URL: <https://trac.macports.org/ticket/61041#comment:7>
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