Sat, 09 Jun 2018 18:11:49 +0900 Yuya Nishihara fileset: rewrite andset() to not use mctx.narrow()
Sun, 10 Jun 2018 20:02:53 +0900 Yuya Nishihara fileset: add helpers to make predicatematcher and nevermatcher
Sat, 14 Jul 2018 13:21:49 +0900 Yuya Nishihara phases: micro-optimize newheads() to not create context objects
Sat, 14 Jul 2018 13:19:18 +0900 Yuya Nishihara phases: remove excessive optimization from newheads() (issue5939)
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