[INFO] fetching crate null-terminated 0.3.15...
[INFO] testing null-terminated-0.3.15 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate null-terminated 0.3.15 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate null-terminated 0.3.15 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate null-terminated 0.3.15
[INFO] finished tweaking crates.io crate null-terminated 0.3.15
[INFO] tweaked toml for crates.io crate null-terminated 0.3.15 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] crate crates.io crate null-terminated 0.3.15 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9b1c617fe94c31565cdf4c4797e873aa49868a19179892546e7a4a907762e82
[INFO] running `Command { std: "docker" "start" "-a" "d9b1c617fe94c31565cdf4c4797e873aa49868a19179892546e7a4a907762e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9b1c617fe94c31565cdf4c4797e873aa49868a19179892546e7a4a907762e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9b1c617fe94c31565cdf4c4797e873aa49868a19179892546e7a4a907762e82", kill_on_drop: false }`
[INFO] [stdout] d9b1c617fe94c31565cdf4c4797e873aa49868a19179892546e7a4a907762e82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 077d32a29fc57658427778bdd2ee8f9e846fa8721cd96cf38084d41fc0ec0fff
[INFO] running `Command { std: "docker" "start" "-a" "077d32a29fc57658427778bdd2ee8f9e846fa8721cd96cf38084d41fc0ec0fff", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling utf v0.1.5
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling null-terminated v0.3.15 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | #![feature(const_raw_ptr_deref)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(extern_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `null-terminated` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "077d32a29fc57658427778bdd2ee8f9e846fa8721cd96cf38084d41fc0ec0fff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "077d32a29fc57658427778bdd2ee8f9e846fa8721cd96cf38084d41fc0ec0fff", kill_on_drop: false }`
[INFO] [stdout] 077d32a29fc57658427778bdd2ee8f9e846fa8721cd96cf38084d41fc0ec0fff