Bug #15906
a=a のような式をもつ条件分岐が意図しない挙動をする
Description
[ruby-list:50781] から一部転載します。
下記スクリプトの結果が期待と違います。なぜでしょうか? a = a は不要ですが、なにもしないことを明示するために書いたものです。 なおOS付属の ruby 2.3.7p456 では期待通りの結果でした。 a = "aaa" if a == "bbb" || a == "ccc" then a = a else puts "OK" end puts "END" 実行結果 END 期待する結果 OK END 動作環境 MacOS 10.13.6 ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-darwin17] macportsでインストール
r63870 から発生するようになっているようです。
Associated revisions
merge revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d: [Backport #15906]
compile.c: Partially revert r63870 which caused wrong optimization [Bug #15906]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d: [Backport #15906]
compile.c: Partially revert r63870 which caused wrong optimization [Bug #15906]
merge revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d: [Backport #15906]
compile.c: Partially revert r63870 which caused wrong optimization [Bug #15906]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d: [Backport #15906]
compile.c: Partially revert r63870 which caused wrong optimization [Bug #15906]
History
Updated by mame (Yusuke Endoh) 6 months ago
- Status changed from Open to Closed
Applied in changeset git|a6a26e42b15c46f117f4fce07a2050e9d727355d.
compile.c: Partially revert r63870 which caused wrong optimization
[Bug #15906]
Updated by nagachika (Tomoyuki Chikanaga) 5 months ago
- Backport changed from 2.4: DONTNEED, 2.5: REQUIRED, 2.6: REQUIRED to 2.4: DONTNEED, 2.5: REQUIRED, 2.6: DONE
ruby_2_6 r67716 merged revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d.
Updated by usa (Usaku NAKAMURA) 4 months ago
- Backport changed from 2.4: DONTNEED, 2.5: REQUIRED, 2.6: DONE to 2.4: DONTNEED, 2.5: DONE, 2.6: DONE
ruby_2_5 r67757 merged revision(s) a6a26e42b15c46f117f4fce07a2050e9d727355d.
compile.c: Partially revert r63870 which caused wrong optimization
[Bug #15906]