Meson

libnixf/Sema: mark nested with expressions alive #3243

Job	Run time
nix-build-develop-clang (none, release, true)	2m 59s
nix-build-develop-gcc (none, release, true)	2m 59s
nix-build-develop-clang (none, release, false)	2m 58s
nix-build-develop-gcc (none, release, false)	3m 4s
nix-build-develop-clang (none, debug, true)	2m 41s
nix-build-develop-gcc (none, debug, true)	2m 54s
nix-build-develop-clang (none, debug, false)	2m 43s
nix-build-develop-gcc (none, debug, false)	2m 59s
nix-build-develop-gcc (address, release, true)	4m 49s
nix-build-develop-gcc (address, release, false)	4m 42s
nix-build-develop-gcc (address, debug, true)	3m 58s
nix-build-develop-gcc (address, debug, false)	4m 10s
nix-build-develop-gcc (undefined, release, true)	4m 10s
nix-build-develop-gcc (undefined, release, false)	4m 3s
nix-build-develop-gcc (undefined, debug, true)	3m 14s
nix-build-develop-gcc (undefined, debug, false)	3m 21s
	55m 44s

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