Rust

Merge pull request #516 from nicoburns/remove-non-exhaustive #1174

Job	Run time
build_lib_test (nightly)	58s
build_wasm (nightly)	53s
build_lib_test (beta)	1m 15s
build_bin_spec (nightly)	58s
build_wasm (beta)	54s
build_lib_test (stable)	1m 33s
build_bin_spec (beta)	1m 16s
build_wasm (stable)	43s
build_lib_test ($MSRV)	2m 46s
build_bin_spec (stable)	56s
build_wasm ($MSRV)	2m 12s
build_bin_spec ($MSRV)	2m 22s
no_features_build_test (nightly)	31s
no_features_build_test (beta)	25s
clippy_format	1m 51s
no_features_build_test (stable)	19s
no_features_build_test ($MSRV)	1m 43s
lockfile	51s
	22m 26s

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