[INFO] fetching crate pi_cowlist 0.1.0...
[INFO] testing pi_cowlist-0.1.0 against 1.76.0 for beta-1.77-1
[INFO] extracting crate pi_cowlist 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate pi_cowlist 0.1.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pi_cowlist 0.1.0
[INFO] finished tweaking crates.io crate pi_cowlist 0.1.0
[INFO] tweaked toml for crates.io crate pi_cowlist 0.1.0 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" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e71de347d7d4baeed7f09b299b089df93bfbb3466db37327264feb6a220720c
[INFO] running `Command { std: "docker" "start" "-a" "9e71de347d7d4baeed7f09b299b089df93bfbb3466db37327264feb6a220720c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e71de347d7d4baeed7f09b299b089df93bfbb3466db37327264feb6a220720c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e71de347d7d4baeed7f09b299b089df93bfbb3466db37327264feb6a220720c", kill_on_drop: false }`
[INFO] [stdout] 9e71de347d7d4baeed7f09b299b089df93bfbb3466db37327264feb6a220720c
[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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c80803ba82140f7eca66fa2038f0aec4829c1bc2d669d6cc2699dad820e1126
[INFO] running `Command { std: "docker" "start" "-a" "3c80803ba82140f7eca66fa2038f0aec4829c1bc2d669d6cc2699dad820e1126", kill_on_drop: false }`
[INFO] [stderr]    Compiling pi_cowlist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core_intrinsics)] 
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core_intrinsics)] 
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pi_cowlist` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "3c80803ba82140f7eca66fa2038f0aec4829c1bc2d669d6cc2699dad820e1126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c80803ba82140f7eca66fa2038f0aec4829c1bc2d669d6cc2699dad820e1126", kill_on_drop: false }`
[INFO] [stdout] 3c80803ba82140f7eca66fa2038f0aec4829c1bc2d669d6cc2699dad820e1126
