This is a kind of "thought experiment". I don't know the answer,.If you need to incorporate an "emergency fix" for an unmaintained crate, how do you go about it? To be specific, suppose I want to build an application using cargo, but I want to make one small change to a crates.io crate ( which may be a direct or indirect dependency ), how would I go about it? Or to put it another way, how would I "patch" crates.io in an emergency? Is there any way to express this in a cargo.toml file?

( I was thinking about this due to this post "Concerns on the Long Term Viability of Rust for Real World Applications" )

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