panic-handler is used at run time in 52 crates (of which 3 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) panic-handler version
1.2K 20 tp-state-machine optional ^2.1.2
250 13 tc-executor ^2.0.2
8 tc-cli ^2.0.2