Add `try` intrinsics #8535

Job	Run time
build-and-check-gcc-5	30m 47s
build-and-check-ubuntu-64bit-glibcxx	26m 6s
build-and-check-asan	29m 59s
build-and-check-ubuntu-64bit	23m 4s
build-and-check-ubuntu-32bit	24m 57s
	2h 14m 53s

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