[PATCH] D69330: [AST] Add RecoveryExpr to retain expressions on semantic errors

[pre-merge checks [bot] via Phabricator via cfe-commits]

merge_guards_bot added a comment.

{icon question-circle color=gray} Unit tests: unknown.

{icon question-circle color=gray} clang-tidy: unknown.

{icon question-circle color=gray} clang-format: unknown.

Build artifacts <http://results.llvm-merge-guard.org/amd64_debian_testing_clang8-2039>: diff.json <http://results.llvm-merge-guard.org/amd64_debian_testing_clang8-2039/diff.json>, console-log.txt <http://results.llvm-merge-guard.org/amd64_debian_testing_clang8-2039/console-log.txt>

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https://reviews.llvm.org/D69330