Rust toolchain failure observed with CEP18 contract.

[SaiProServ]

The following error has been reported by Jiuhong.

Rust toolchain

error: package bumpalo v3.15.3cannot be built because it requires rustc 1.73.0 or newer, while the currently active rustc version is 1.68.0-nightly Either upgrade to rustc 1.73.0 or newer, or use cargo update -p [email protected] --precise ver whereveris the latest version ofbumpalo supporting rustc 1.68.0-nightly make: *** [Makefile:10: build-contract] Error 101

"error_message": "Wasm preprocessing error: Deserialization error: Unknown opcode 192"

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