tree ba11f452e030554f3b388ba48fae964c5cb25149
parent 4226bff789fccd1e5998a7063ff2a4a427aa5585
author Todd Volkert <tvolkert@users.noreply.github.com> 1522259908 -0700
committer GitHub <noreply@github.com> 1522259908 -0700
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Make AppContext immutable and race-free (#15984)

This updates AppContext per the recommendations in #15352

Fixes #15352