[INFO] fetching crate shuftlib 0.1.2...
[INFO] testing shuftlib-0.1.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate shuftlib 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate shuftlib 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate shuftlib 0.1.2
[INFO] tweaked toml for crates.io crate shuftlib 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate shuftlib 0.1.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate shuftlib 0.1.2 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.89
[INFO] [stderr]   Downloaded proptest v1.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28097711c482881f1f478c9248b2040ae0f2344fd074332851005f2c97d87ddb
[INFO] running `Command { std: "docker" "start" "-a" "28097711c482881f1f478c9248b2040ae0f2344fd074332851005f2c97d87ddb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28097711c482881f1f478c9248b2040ae0f2344fd074332851005f2c97d87ddb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28097711c482881f1f478c9248b2040ae0f2344fd074332851005f2c97d87ddb", kill_on_drop: false }`
[INFO] [stdout] 28097711c482881f1f478c9248b2040ae0f2344fd074332851005f2c97d87ddb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4da45100b7198e4e48a2011ba3e9c8eb6f2d8674de14448f67b70971c10e0879
[INFO] running `Command { std: "docker" "start" "-a" "4da45100b7198e4e48a2011ba3e9c8eb6f2d8674de14448f67b70971c10e0879", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling anyhow v1.0.89
[INFO] [stderr]    Compiling array-init v2.1.0
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling strum v0.25.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling shuftlib v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generic_const_exprs)]
[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 `shuftlib` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4da45100b7198e4e48a2011ba3e9c8eb6f2d8674de14448f67b70971c10e0879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4da45100b7198e4e48a2011ba3e9c8eb6f2d8674de14448f67b70971c10e0879", kill_on_drop: false }`
[INFO] [stdout] 4da45100b7198e4e48a2011ba3e9c8eb6f2d8674de14448f67b70971c10e0879