Rust

fix region after trivia start #103

Job	Run time
build (ubuntu-20.04, x86_64-unknown-linux-gnu, linux-x64, general)	2m 31s
build (ubuntu-22.04, x86_64-unknown-linux-gnu, linux-x64, zigbuild, 2.17)	4m 18s
build (ubuntu-22.04, aarch64-unknown-linux-gnu, linux-arm64, zigbuild, 2.17)	4m 38s
build (ubuntu-22.04, riscv64gc-unknown-linux-gnu, linux-riscv64, cross)	3m 16s
build (ubuntu-20.04, x86_64-unknown-linux-musl, linux-musl, cross)	3m 35s
build (macos-latest, x86_64-apple-darwin, darwin-x64, general)	2m 6s
build (macos-latest, aarch64-apple-darwin, darwin-arm64, general)	2m 25s
build (windows-latest, x86_64-pc-windows-msvc, win32-x64, general)	4m 24s
build (windows-latest, i686-pc-windows-msvc, win32-ia32, general)	6m 9s
build (windows-latest, aarch64-pc-windows-msvc, win32-arm64, general)	6m 6s
release	0s
	39m 28s

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