[INFO] fetching crate trie 0.2.1...
[INFO] testing trie-0.2.1 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate trie 0.2.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate trie 0.2.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trie 0.2.1
[INFO] finished tweaking crates.io crate trie 0.2.1
[INFO] tweaked toml for crates.io crate trie 0.2.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd096f872943b81423751bc7f07e168e9dcc67de42089d49f66c5f9b8ca2087b
[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" "dd096f872943b81423751bc7f07e168e9dcc67de42089d49f66c5f9b8ca2087b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd096f872943b81423751bc7f07e168e9dcc67de42089d49f66c5f9b8ca2087b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd096f872943b81423751bc7f07e168e9dcc67de42089d49f66c5f9b8ca2087b", kill_on_drop: false }`
[INFO] [stdout] dd096f872943b81423751bc7f07e168e9dcc67de42089d49f66c5f9b8ca2087b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] 4226f725bde82254911c9c2dee9b06cf6676d9c0095c2a7787c458322e8b11c7
[INFO] running `Command { std: "docker" "start" "-a" "4226f725bde82254911c9c2dee9b06cf6676d9c0095c2a7787c458322e8b11c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling ordered_iter v0.1.2
[INFO] [stderr]    Compiling trie v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "4226f725bde82254911c9c2dee9b06cf6676d9c0095c2a7787c458322e8b11c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4226f725bde82254911c9c2dee9b06cf6676d9c0095c2a7787c458322e8b11c7", kill_on_drop: false }`
[INFO] [stdout] 4226f725bde82254911c9c2dee9b06cf6676d9c0095c2a7787c458322e8b11c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94684c81b3a5ab3531b8be7cfe9f37ba025ef5b9f62f0ef3976c04bad3b681b9
[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" "94684c81b3a5ab3531b8be7cfe9f37ba025ef5b9f62f0ef3976c04bad3b681b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling trie v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(test, feature(fn_traits, test, unboxed_closures))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `trie`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "94684c81b3a5ab3531b8be7cfe9f37ba025ef5b9f62f0ef3976c04bad3b681b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94684c81b3a5ab3531b8be7cfe9f37ba025ef5b9f62f0ef3976c04bad3b681b9", kill_on_drop: false }`
[INFO] [stdout] 94684c81b3a5ab3531b8be7cfe9f37ba025ef5b9f62f0ef3976c04bad3b681b9
