gensym is used at run time in 48 crates (of which 3 optionally). It is a direct run-time dependency in 7 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) gensym version
16K 23 futures-signals ^0.1.0
180 1 static_str_ops ^0.1
100 2 vineyard ^0.1
wasm-init ^0.1
libside ^0.1
hecs-component-provider ^0.1
bittyset ^0.1.0