Rust 1.73.0 may have some problems for MIPS targets

[tatsuya6502]

Hi. FYI, you might want to avoid using Rust 1.73.0 for MIPS target.

I noticed some of the unit tests in moka cache started to fail for a MIPS target:

• With Rust 1.73.0, some unit tests started to fail for mips-unknown-linux-musl target moka-rs/moka#333

In rust-lang Zulip, one user has reported that he has a problem with Rust 1.73.0 (unrelated to moka):

• rust-lang >> t-compiler/help >> mipsel-unknown-linux-musl appears sad between 1.72.1/1.73.0

I'm investigating further, and I realise that MIPS isn't getting a lot of love in recently times, but I've noticed a problem with my program when using 1.73.0 of the toolchain. The problem is not there for 1.72.1.