[INFO] fetching crate ab-merkle-tree 0.1.0...
[INFO] checking ab-merkle-tree-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate ab-merkle-tree 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate ab-merkle-tree 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ab-merkle-tree 0.1.0
[INFO] tweaked toml for crates.io crate ab-merkle-tree 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ab-merkle-tree 0.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ab-merkle-tree 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chacha20 v0.10.0
[INFO] [stderr]   Downloaded no-panic v0.1.36
[INFO] [stderr]   Downloaded criterion-plot v0.8.2
[INFO] [stderr]   Downloaded alloca v0.4.0
[INFO] [stderr]   Downloaded ab-blake3 v0.1.0
[INFO] [stderr]   Downloaded rand_core v0.10.0
[INFO] [stderr]   Downloaded constant_time_eq v0.4.2
[INFO] [stderr]   Downloaded page_size v0.6.0
[INFO] [stderr]   Downloaded cpufeatures v0.3.0
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.40
[INFO] [stderr]   Downloaded criterion v0.8.2
[INFO] [stderr]   Downloaded zerocopy v0.8.40
[INFO] [stderr]   Downloaded blake3 v1.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e4104bf0c2aa999b781c2d104233124779e1b9901bf22ff1c7b6f73b5cc4772
[INFO] running `Command { std: "docker" "start" "-a" "8e4104bf0c2aa999b781c2d104233124779e1b9901bf22ff1c7b6f73b5cc4772", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e4104bf0c2aa999b781c2d104233124779e1b9901bf22ff1c7b6f73b5cc4772", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e4104bf0c2aa999b781c2d104233124779e1b9901bf22ff1c7b6f73b5cc4772", kill_on_drop: false }`
[INFO] [stdout] 8e4104bf0c2aa999b781c2d104233124779e1b9901bf22ff1c7b6f73b5cc4772
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9a13be0dd0746cfe51ff721c5b55866588731045f992b159f94732ecb604ddb
[INFO] running `Command { std: "docker" "start" "-a" "e9a13be0dd0746cfe51ff721c5b55866588731045f992b159f94732ecb604ddb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling libc v0.2.182
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking cpufeatures v0.2.17
[INFO] [stderr]     Checking arrayref v0.3.9
[INFO] [stderr]     Checking regex-syntax v0.8.10
[INFO] [stderr]     Checking constant_time_eq v0.4.2
[INFO] [stderr]     Checking anstyle v1.0.13
[INFO] [stderr]     Checking clap_lex v1.0.0
[INFO] [stderr]     Checking itoa v1.0.17
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling cc v1.2.56
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking rand_core v0.10.0
[INFO] [stderr]     Checking cpufeatures v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking clap_builder v4.6.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking chacha20 v0.10.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]    Compiling blake3 v1.8.3
[INFO] [stderr]    Compiling alloca v0.4.0
[INFO] [stderr]     Checking criterion-plot v0.8.2
[INFO] [stderr]     Checking clap v4.6.0
[INFO] [stderr]     Checking ab-blake3 v0.1.0
[INFO] [stderr]     Checking ab-merkle-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | / #![feature(
[INFO] [stdout] 33 | |     const_block_items,
[INFO] [stdout] 34 | |     generic_const_exprs,
[INFO] [stdout] 35 | |     iter_advance_by,
[INFO] [stdout] 36 | |     maybe_uninit_uninit_array_transpose,
[INFO] [stdout] 37 | |     trusted_len
[INFO] [stdout] 38 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ab-merkle-tree` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e9a13be0dd0746cfe51ff721c5b55866588731045f992b159f94732ecb604ddb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9a13be0dd0746cfe51ff721c5b55866588731045f992b159f94732ecb604ddb", kill_on_drop: false }`
[INFO] [stdout] e9a13be0dd0746cfe51ff721c5b55866588731045f992b159f94732ecb604ddb
