va_list is used at run time in 9 crates (of which 3 optionally, 7 directly).

Depender (with downloads and own rev deps) va_list version
4.2K 1 csound-sys ^0.1.3
4.2K 1 csound ^0.1.3
500 1 tarantool ^0.1.3
100 rust-macios ^0.1.4
couchbase-lite ^0.1.4
tarantool-module ^0.1.3
lua-sys optional ^0.1.3