[INFO] cloning repository https://github.com/henryphamit/Rentalproperty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/henryphamit/Rentalproperty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenryphamit%2FRentalproperty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenryphamit%2FRentalproperty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c393a4245903367795d18c69176878ca71443eb
[INFO] testing henryphamit/Rentalproperty against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenryphamit%2FRentalproperty" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/henryphamit/Rentalproperty on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/henryphamit/Rentalproperty
[INFO] finished tweaking git repo https://github.com/henryphamit/Rentalproperty
[INFO] tweaked toml for git repo https://github.com/henryphamit/Rentalproperty written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/henryphamit/Rentalproperty already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--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-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b3521bf8427f00738f7c0bbdcf2fe6cf283758d6910db8694ecff4895d03aad
[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" "8b3521bf8427f00738f7c0bbdcf2fe6cf283758d6910db8694ecff4895d03aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b3521bf8427f00738f7c0bbdcf2fe6cf283758d6910db8694ecff4895d03aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b3521bf8427f00738f7c0bbdcf2fe6cf283758d6910db8694ecff4895d03aad", kill_on_drop: false }`
[INFO] [stdout] 8b3521bf8427f00738f7c0bbdcf2fe6cf283758d6910db8694ecff4895d03aad
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b83b2827e2dcf92b423aed8a67c5a1f6852dded6e3d7e605fcc068bcc4e73f7
[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" "4b83b2827e2dcf92b423aed8a67c5a1f6852dded6e3d7e605fcc068bcc4e73f7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling wee_alloc v0.4.4
[INFO] [stderr]    Compiling memory_units v0.4.0
[INFO] [stderr]    Compiling rustc-hex v2.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling fixed-hash v0.3.2
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling tiny-keccak v1.4.2
[INFO] [stderr]    Compiling ink_utils v0.1.0 (https://github.com/paritytech/ink.git?rev=1748b51ad8364d71bbd18b67db587bb694fb1aef#1748b51a)
[INFO] [stderr]    Compiling uint v0.7.1
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/hashbrown-0.1.8/src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     feature(
[INFO] [stdout] 16 | |         alloc,
[INFO] [stdout] 17 | |         alloc_layout_extra,
[INFO] [stdout] 18 | |         allocator_api,
[INFO] [stdout] ...  |
[INFO] [stdout] 22 | |         dropck_eyepatch
[INFO] [stdout] 23 | |     )
[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 `hashbrown`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4b83b2827e2dcf92b423aed8a67c5a1f6852dded6e3d7e605fcc068bcc4e73f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b83b2827e2dcf92b423aed8a67c5a1f6852dded6e3d7e605fcc068bcc4e73f7", kill_on_drop: false }`
[INFO] [stdout] 4b83b2827e2dcf92b423aed8a67c5a1f6852dded6e3d7e605fcc068bcc4e73f7