[ruby-dev:49544] [Ruby trunk Bug#12229] Backport r53673 to ruby_2_3

Issue #12229 has been updated by Yui NARUSE.

Backport changed from 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED to 2.1: D=
ONTNEED, 2.2: DONTNEED, 2.3: DONE

ruby_2_3 r54419 merged revision(s) 53673.

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Bug #12229: Backport r53673 to ruby_2_3
https://bugs.ruby-lang.org/issues/12229#change-57845

* Author: Usaku NAKAMURA
* Status: Closed
* Priority: Normal
* Assignee:=20
* ruby -v: 2.3
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE
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=E6=99=AE=E9=80=9A=E3=81=AB=E5=AE=9F=E8=A1=8C=E3=81=99=E3=82=8B=E3=81=A8=E5=
=A4=B1=E6=95=97=E3=81=97=E3=81=A6=E5=A4=A7=E5=A4=89=E3=81=AB=E3=81=86=E3=81=
=96=E3=81=84=E3=81=AE=E3=81=A7backport=E3=81=8A=E9=A1=98=E3=81=84=E3=81=97=
=E3=81=BE=E3=81=99=E3=80=82



--=20
https://bugs.ruby-lang.org/