Error: failed to parse lock file at: RESOLVED: Caused by: lock file version 4 requires `-Znext-lockfile-bump`

i was getting this berror when cargo build-sbf or anchor build ..:

cargo build-sbf
error: failed to parse lock file at: /home/anrchsun/devs/ana-cain/Cargo.lock

but if you all could read carefully the solution was given in error message:

Caused by:
lock file version 4 requires -Znext-lockfile-bump

so i ran :slight_smile:

cargo build-sbf -- -Znext-lockfile-bump

and everything worked fine...
Compiling borsh v0.9.3
Compiling anchor-attribute-access-control v0.30.1
Compiling anchor-attribute-account v0.30.1
Compiling anchor-attribute-error v0.30.1
Compiling anchor-attribute-event v0.30.1
Compiling anchor-attribute-constant v0.30.1
Compiling anchor-derive-serde v0.30.1
Compiling anchor-attribute-program v0.30.1
Compiling anchor-derive-accounts v0.30.1
^[[B Building [=======================> ] 165/169: solana-program, solana-program
Compiling anchor-lang v0.30.1
Compiling ana-chain v0.0.0 (/home/anrchsun/devs/ana-cain/program)
Finished release [optimized] target(s) in 1m 31s..

Thank you so much!! I was having the same issue. You're a lifesaver! :sparkling_heart:

I am getting the same error again even after running the command cargo build-sbf -- -Znext-lockfile-bump

you see this error because your rust toolchain is older than the version that generated the lock file.

if the lock file is from your own crate, you can simply delete Cargo.lock and cargo will regenerate the lock file automatically. you may want to make a backup first, just in case some of the dependencies may break semver.

if the lock file is from one of the dependencies, chances are your rust toolchain is older than the MSRV, or the dependency crates didn't specify their MSRV. usually this error goes away after you upgrade your rust toolchain.