[INFO] fetching crate pebble 0.8.5...
[INFO] testing pebble-0.8.5 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate pebble 0.8.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pebble 0.8.5 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pebble 0.8.5
[INFO] finished tweaking crates.io crate pebble 0.8.5
[INFO] tweaked toml for crates.io crate pebble 0.8.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lzf v0.3.1
[INFO] [stderr]   Downloaded recipe-reader v0.9.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e49201c966784c039babcb083179b3f370a97c900c15cdf6355e2d91c2095f18
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e49201c966784c039babcb083179b3f370a97c900c15cdf6355e2d91c2095f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e49201c966784c039babcb083179b3f370a97c900c15cdf6355e2d91c2095f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e49201c966784c039babcb083179b3f370a97c900c15cdf6355e2d91c2095f18", kill_on_drop: false }`
[INFO] [stdout] e49201c966784c039babcb083179b3f370a97c900c15cdf6355e2d91c2095f18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0628f5364c37c1de77c350bb2800a2762ef5aaadcce64319340a91f8b4f45017
[INFO] running `Command { std: "docker" "start" "-a" "0628f5364c37c1de77c350bb2800a2762ef5aaadcce64319340a91f8b4f45017", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling lzf v0.3.1
[INFO] [stderr]    Compiling recipe-reader v0.9.11
[INFO] [stderr]    Compiling pebble v0.8.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_remove_item)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<std::string::String>` in the current scope
[INFO] [stdout]    --> src/commands.rs:475:13
[INFO] [stdout]     |
[INFO] [stdout] 475 |                 t.files.remove_item(&file);
[INFO] [stdout]     |                         ^^^^^^^^^^^ method not found in `Vec<std::string::String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<std::string::String>` in the current scope
[INFO] [stdout]    --> src/commands.rs:557:12
[INFO] [stdout]     |
[INFO] [stdout] 557 |             t.files.remove_item(&filename.to_string());
[INFO] [stdout]     |                     ^^^^^^^^^^^ method not found in `Vec<std::string::String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<std::string::String>` in the current scope
[INFO] [stdout]    --> src/commands.rs:558:12
[INFO] [stdout]     |
[INFO] [stdout] 558 |             t.files.remove_item(&("src/".to_string() + filename));
[INFO] [stdout]     |                     ^^^^^^^^^^^ method not found in `Vec<std::string::String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pebble` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "0628f5364c37c1de77c350bb2800a2762ef5aaadcce64319340a91f8b4f45017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0628f5364c37c1de77c350bb2800a2762ef5aaadcce64319340a91f8b4f45017", kill_on_drop: false }`
[INFO] [stdout] 0628f5364c37c1de77c350bb2800a2762ef5aaadcce64319340a91f8b4f45017
