[INFO] fetching crate waffles-solana-bloom 1.16.0-alpha.10...
[INFO] checking waffles-solana-bloom-1.16.0-alpha.10 against nightly-2024-02-05 for check-cfg-2
[INFO] extracting crate waffles-solana-bloom 1.16.0-alpha.10 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate waffles-solana-bloom 1.16.0-alpha.10 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate waffles-solana-bloom 1.16.0-alpha.10
[INFO] finished tweaking crates.io crate waffles-solana-bloom 1.16.0-alpha.10
[INFO] tweaked toml for crates.io crate waffles-solana-bloom 1.16.0-alpha.10 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memoffset v0.8.0
[INFO] [stderr]   Downloaded ark-bn254 v0.3.0
[INFO] [stderr]   Downloaded serde_with v2.3.3
[INFO] [stderr]   Downloaded ark-ff-macros v0.3.0
[INFO] [stderr]   Downloaded waffles-solana-sdk v1.16.0-alpha.10
[INFO] [stderr]   Downloaded waffles-solana-frozen-abi v1.16.0-alpha.10
[INFO] [stderr]   Downloaded ark-serialize v0.3.0
[INFO] [stderr]   Downloaded ark-std v0.3.0
[INFO] [stderr]   Downloaded waffles-solana-frozen-abi-macro v1.16.0-alpha.10
[INFO] [stderr]   Downloaded waffles-solana-logger v1.16.0-alpha.10
[INFO] [stderr]   Downloaded array-bytes v1.4.1
[INFO] [stderr]   Downloaded ark-ff v0.3.0
[INFO] [stderr]   Downloaded serde_with_macros v2.3.3
[INFO] [stderr]   Downloaded ark-ec v0.3.0
[INFO] [stderr]   Downloaded ark-ff-asm v0.3.0
[INFO] [stderr]   Downloaded waffles-solana-sdk-macro v1.16.0-alpha.10
[INFO] [stderr]   Downloaded waffles-solana-program v1.16.0-alpha.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b93ad0a82f7d2733a049906ce3b52f4309df9cffef05d1e6c7123c6d29d0f3e
[INFO] running `Command { std: "docker" "start" "-a" "5b93ad0a82f7d2733a049906ce3b52f4309df9cffef05d1e6c7123c6d29d0f3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b93ad0a82f7d2733a049906ce3b52f4309df9cffef05d1e6c7123c6d29d0f3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b93ad0a82f7d2733a049906ce3b52f4309df9cffef05d1e6c7123c6d29d0f3e", kill_on_drop: false }`
[INFO] [stdout] 5b93ad0a82f7d2733a049906ce3b52f4309df9cffef05d1e6c7123c6d29d0f3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43904371612c282fbb8eed91cd04e0a99b900b25f53fffe9c8daeaabfabb5376
[INFO] running `Command { std: "docker" "start" "-a" "43904371612c282fbb8eed91cd04e0a99b900b25f53fffe9c8daeaabfabb5376", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling darling_core v0.20.5
[INFO] [stderr]    Compiling waffles-solana-frozen-abi-macro v1.16.0-alpha.10
[INFO] [stderr]    Compiling waffles-solana-frozen-abi v1.16.0-alpha.10
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling waffles-solana-program v1.16.0-alpha.10
[INFO] [stderr]    Compiling waffles-solana-sdk v1.16.0-alpha.10
[INFO] [stderr]     Checking array-bytes v1.4.1
[INFO] [stderr]     Checking waffles-solana-logger v1.16.0-alpha.10
[INFO] [stderr]    Compiling waffles-solana-bloom v1.16.0-alpha.10 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]    Compiling libsecp256k1-core v0.2.2
[INFO] [stderr]     Checking curve25519-dalek v3.2.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking hmac v0.8.1
[INFO] [stderr]    Compiling pest v2.7.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking hmac-drbg v0.3.0
[INFO] [stderr]     Checking blake3 v1.5.0
[INFO] [stderr]     Checking pbkdf2 v0.4.0
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking tiny-bip39 v0.8.2
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking pbkdf2 v0.11.0
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[INFO] [stderr]     Checking ark-std v0.3.0
[INFO] [stderr]     Checking ed25519-dalek-bip32 v0.2.0
[INFO] [stderr]    Compiling libsecp256k1-gen-genmult v0.2.1
[INFO] [stderr]    Compiling libsecp256k1-gen-ecmult v0.2.1
[INFO] [stderr]     Checking ark-serialize v0.3.0
[INFO] [stderr]    Compiling libsecp256k1 v0.6.0
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling darling_macro v0.20.5
[INFO] [stderr]    Compiling ark-ff v0.3.0
[INFO] [stderr]    Compiling darling v0.20.5
[INFO] [stderr]    Compiling serde_with_macros v2.3.3
[INFO] [stderr]     Checking serde_with v2.3.3
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling borsh-derive v0.9.3
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling waffles-solana-sdk-macro v1.16.0-alpha.10
[INFO] [stderr]     Checking borsh v0.9.3
[INFO] [stderr]     Checking num_enum v0.5.11
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-bn254 v0.3.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.95s
[INFO] running `Command { std: "docker" "inspect" "43904371612c282fbb8eed91cd04e0a99b900b25f53fffe9c8daeaabfabb5376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43904371612c282fbb8eed91cd04e0a99b900b25f53fffe9c8daeaabfabb5376", kill_on_drop: false }`
[INFO] [stdout] 43904371612c282fbb8eed91cd04e0a99b900b25f53fffe9c8daeaabfabb5376
[INFO] checking waffles-solana-bloom-1.16.0-alpha.10 against nightly-2024-02-05+rustflags=-Dunexpected_cfgs+cargoflags=-Zcheck-cfg for check-cfg-2
[INFO] extracting crate waffles-solana-bloom 1.16.0-alpha.10 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate waffles-solana-bloom 1.16.0-alpha.10 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate waffles-solana-bloom 1.16.0-alpha.10
[INFO] finished tweaking crates.io crate waffles-solana-bloom 1.16.0-alpha.10
[INFO] tweaked toml for crates.io crate waffles-solana-bloom 1.16.0-alpha.10 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 745bf108c22f8357b4870dcf3f3bed72413c2eebbbe93b4dfde2d1f836d1ad1d
[INFO] running `Command { std: "docker" "start" "-a" "745bf108c22f8357b4870dcf3f3bed72413c2eebbbe93b4dfde2d1f836d1ad1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "745bf108c22f8357b4870dcf3f3bed72413c2eebbbe93b4dfde2d1f836d1ad1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "745bf108c22f8357b4870dcf3f3bed72413c2eebbbe93b4dfde2d1f836d1ad1d", kill_on_drop: false }`
[INFO] [stdout] 745bf108c22f8357b4870dcf3f3bed72413c2eebbbe93b4dfde2d1f836d1ad1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunexpected_cfgs" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zcheck-cfg", kill_on_drop: false }`
[INFO] [stdout] 4d7f5219e55a5002a3b9733649e4c9d110720b9efbc3455b6d8b42e9faee1bf8
[INFO] running `Command { std: "docker" "start" "-a" "4d7f5219e55a5002a3b9733649e4c9d110720b9efbc3455b6d8b42e9faee1bf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling darling_core v0.20.5
[INFO] [stderr]    Compiling waffles-solana-frozen-abi-macro v1.16.0-alpha.10
[INFO] [stderr]    Compiling waffles-solana-frozen-abi v1.16.0-alpha.10
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling waffles-solana-program v1.16.0-alpha.10
[INFO] [stderr]    Compiling waffles-solana-sdk v1.16.0-alpha.10
[INFO] [stderr]     Checking array-bytes v1.4.1
[INFO] [stderr]     Checking waffles-solana-logger v1.16.0-alpha.10
[INFO] [stderr]    Compiling libsecp256k1-core v0.2.2
[INFO] [stderr]    Compiling waffles-solana-bloom v1.16.0-alpha.10 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling pest v2.7.7
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking curve25519-dalek v3.2.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking hmac v0.8.1
[INFO] [stderr]     Checking pbkdf2 v0.4.0
[INFO] [stderr]     Checking hmac-drbg v0.3.0
[INFO] [stderr]     Checking tiny-bip39 v0.8.2
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking blake3 v1.5.0
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking pbkdf2 v0.11.0
[INFO] [stderr]     Checking ark-std v0.3.0
[INFO] [stderr]     Checking ark-serialize v0.3.0
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[INFO] [stderr]     Checking ed25519-dalek-bip32 v0.2.0
[INFO] [stderr]    Compiling libsecp256k1-gen-genmult v0.2.1
[INFO] [stderr]    Compiling libsecp256k1-gen-ecmult v0.2.1
[INFO] [stderr]    Compiling libsecp256k1 v0.6.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.20.5
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling ark-ff v0.3.0
[INFO] [stderr]    Compiling darling v0.20.5
[INFO] [stderr]    Compiling serde_with_macros v2.3.3
[INFO] [stderr]     Checking serde_with v2.3.3
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]    Compiling borsh-derive v0.9.3
[INFO] [stderr]    Compiling waffles-solana-sdk-macro v1.16.0-alpha.10
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]     Checking borsh v0.9.3
[INFO] [stderr]     Checking num_enum v0.5.11
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-bn254 v0.3.0
[INFO] [stdout] error: unexpected `cfg` condition name: `RUSTC_WITH_SPECIALIZATION`
[INFO] [stdout]  --> src/lib.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(RUSTC_WITH_SPECIALIZATION, feature(min_specialization))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(RUSTC_WITH_SPECIALIZATION)");` to the top of a `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]   = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `RUSTC_WITH_SPECIALIZATION`
[INFO] [stdout]  --> src/lib.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(RUSTC_WITH_SPECIALIZATION, feature(min_specialization))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(RUSTC_WITH_SPECIALIZATION)");` to the top of a `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]   = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `waffles-solana-bloom` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `waffles-solana-bloom` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4d7f5219e55a5002a3b9733649e4c9d110720b9efbc3455b6d8b42e9faee1bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d7f5219e55a5002a3b9733649e4c9d110720b9efbc3455b6d8b42e9faee1bf8", kill_on_drop: false }`
[INFO] [stdout] 4d7f5219e55a5002a3b9733649e4c9d110720b9efbc3455b6d8b42e9faee1bf8
