anchor build failed. with use of unstable library feature 'build_hasher_simple_hash_one'

[just-like-a-boby]

here is my tool-chain
anchor_version = "0.29.0" solana_version = "1.17.13"
i have change the solana_version from 1.16.24 stable to 1.17.13. but it did't work

[just-like-a-boby]

rustc version is rustc 1.76.0-nightly

[acheroncrypto]

This happens because Solana's rustc is outdated(solana-labs/solana#33504).

The easiest way to fix this is to downgrade ahash version to the latest compatible version by adding:

ahash = "=0.8.6"

to your dependency list in Cargo.toml.

[acheroncrypto]

Fixed in solana-labs/solana#34636 and solana-labs/solana#34650

[oWahyudi]

still having hash error when building (anchor build)

[dependencies]
ahash = "=0.8.6"

error[E0658]: use of unstable library feature 'build_hasher_simple_hash_one'
--> src/random_state.rs:463:5
|
463 | / fn hash_one<T: Hash>(&self, x: T) -> u64 {
464 | | RandomState::hash_one(self, x)
465 | | }
| |_____^
|
= note: see issue #86161 rust-lang/rust#86161 for more information
= help: add #![feature(build_hasher_simple_hash_one)] to the crate attributes to enable

For more information about this error, try rustc --explain E0658.
error: could not compile ahash due to previous error

[beeman]

still having hash error when building (anchor build)

[dependencies] ahash = "=0.8.6"

error[E0658]: use of unstable library feature 'build_hasher_simple_hash_one' --> src/random_state.rs:463:5 | 463 | / fn hash_one<T: Hash>(&self, x: T) -> u64 { 464 | | RandomState::hash_one(self, x) 465 | | } | |_____^ | = note: see issue #86161 rust-lang/rust#86161 for more information = help: add #![feature(build_hasher_simple_hash_one)] to the crate attributes to enable

For more information about this error, try rustc --explain E0658. error: could not compile ahash due to previous error

Can you share a repo that shows this error so I can test it locally?

[oWahyudi]

this my repo:
https://github.com/oWahyudi/staking_program

The codes can successfully compile using the cargo build command.

$>cargo build
warning: `staking_program` (lib) generated 9 warnings (1 duplicate) (run `cargo fix --lib -p staking_program` to apply 5 suggestions)
    Finished dev [unoptimized + debuginfo] target(s) in 0.11s

compilation error when compile using the anchor build command.

$>anchor build
error: package `solana-program v1.18.0` cannot be built because it requires rustc 1.72.0 or newer, while the currently active rustc version is 1.68.0-dev
Either upgrade to rustc 1.72.0 or newer, or use
cargo update -p solana-program@1.18.0 --precise ver
where `ver` is the latest version of `solana-program` supporting rustc 1.68.0-dev

[acheroncrypto]

compilation error when compile using the anchor build command.

$>anchor build
error: package `solana-program v1.18.0` cannot be built because it requires rustc 1.72.0 or newer, while the currently active rustc version is 1.68.0-dev
Either upgrade to rustc 1.72.0 or newer, or use
cargo update -p solana-program@1.18.0 --precise ver
where `ver` is the latest version of `solana-program` supporting rustc 1.68.0-dev

That error has nothing to do with this issue, run solana-install init 1.18.0 to fix it.