cargo contract new commond can create contract that the name start with a digit ,but cargo not support it

Created by: gpBlockchain

step 1： cargo contract new 123hahah

step 2: cd 123hahah cargo +nightly test result : test@MacBook-Pro-4 12haha % cargo +nightly test error: failed to parse manifest at /Users/test/testEnv/1/12haha/Cargo.toml

Caused by: the name 12haha cannot be used as a package name, the name cannot start with a digit