[INFO] fetching crate lovm2 0.2.11...
[INFO] testing lovm2-0.2.11 against 1.45.2 for beta-1.46-1
[INFO] extracting crate lovm2 0.2.11 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate lovm2 0.2.11 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lovm2 0.2.11
[INFO] finished tweaking crates.io crate lovm2 0.2.11
[INFO] tweaked toml for crates.io crate lovm2 0.2.11 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate lovm2 0.2.11 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", 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] 7e6e767e64cbf2e4b9ad84fa57166b4f165728cae7725654b104f85a51d2976c
[INFO] running `Command { std: "docker" "start" "-a" "7e6e767e64cbf2e4b9ad84fa57166b4f165728cae7725654b104f85a51d2976c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e6e767e64cbf2e4b9ad84fa57166b4f165728cae7725654b104f85a51d2976c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e6e767e64cbf2e4b9ad84fa57166b4f165728cae7725654b104f85a51d2976c", kill_on_drop: false }`
[INFO] [stdout] 7e6e767e64cbf2e4b9ad84fa57166b4f165728cae7725654b104f85a51d2976c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1af1df71101ebb112de277bd1a93ae3e0f7fe8d851290a28349f114f0136d6b
[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" "d1af1df71101ebb112de277bd1a93ae3e0f7fe8d851290a28349f114f0136d6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling libloading v0.6.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling dirs v3.0.1
[INFO] [stderr]    Compiling lovm2_internals v0.2.0
[INFO] [stderr]    Compiling bincode v1.3.1
[INFO] [stderr]    Compiling lovm2 v0.2.11 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | #![feature(const_in_array_repeat_expressions)]
[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 `lovm2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d1af1df71101ebb112de277bd1a93ae3e0f7fe8d851290a28349f114f0136d6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1af1df71101ebb112de277bd1a93ae3e0f7fe8d851290a28349f114f0136d6b", kill_on_drop: false }`
[INFO] [stdout] d1af1df71101ebb112de277bd1a93ae3e0f7fe8d851290a28349f114f0136d6b