[onair4you]

It might have more to do with the first release of Z3 being in 2012, with the first stable Rust release being in 2015. Rather than the authors of Z3 passing some kind of judgment on Rust…

[amelius]

Z3 uses a sophisticated and fast garbage collection scheme internally that doesn't mesh well with Rust idioms.

[invl]

It's reference-counted at the boundaries. See https://github.com/Z3Prover/z3/blob/daf2506b6002149d531cb6c9...