[INFO] fetching crate dep-obj 0.34.1...
[INFO] checking dep-obj-0.34.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate dep-obj 0.34.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate dep-obj 0.34.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dep-obj 0.34.1
[INFO] finished tweaking crates.io crate dep-obj 0.34.1
[INFO] tweaked toml for crates.io crate dep-obj 0.34.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate dep-obj 0.34.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panicking v0.0.1
[INFO] [stderr]   Downloaded educe v0.4.18
[INFO] [stderr]   Downloaded macro-attr-2018 v1.1.1
[INFO] [stderr]   Downloaded dyn-context v0.10.8
[INFO] [stderr]   Downloaded components-arena v2.1.5
[INFO] [stderr]   Downloaded phantom-type v0.3.1
[INFO] [stderr]   Downloaded generics v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cb2d591271ec44a4c9113987ef97749a47642dff1c45365901e5557423d5dd4
[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" "3cb2d591271ec44a4c9113987ef97749a47642dff1c45365901e5557423d5dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cb2d591271ec44a4c9113987ef97749a47642dff1c45365901e5557423d5dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb2d591271ec44a4c9113987ef97749a47642dff1c45365901e5557423d5dd4", kill_on_drop: false }`
[INFO] [stdout] 3cb2d591271ec44a4c9113987ef97749a47642dff1c45365901e5557423d5dd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aaf08b2430b72f1b7f5d45cfc420921bda805f4fc6326d76f33e2c9fee2f7674
[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" "aaf08b2430b72f1b7f5d45cfc420921bda805f4fc6326d76f33e2c9fee2f7674", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]     Checking generics v0.3.2
[INFO] [stderr]     Checking panicking v0.0.1
[INFO] [stderr]     Checking macro-attr-2018 v1.1.1
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.2
[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/memoffset-0.6.4/src/lib.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | /     feature(
[INFO] [stdout] 63 | |         const_ptr_offset_from,
[INFO] [stdout] 64 | |         const_maybe_uninit_as_ptr,
[INFO] [stdout] 65 | |         const_raw_ptr_deref,
[INFO] [stdout] 66 | |         const_refs_to_cell,
[INFO] [stdout] 67 | |     )
[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 `memoffset` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "aaf08b2430b72f1b7f5d45cfc420921bda805f4fc6326d76f33e2c9fee2f7674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaf08b2430b72f1b7f5d45cfc420921bda805f4fc6326d76f33e2c9fee2f7674", kill_on_drop: false }`
[INFO] [stdout] aaf08b2430b72f1b7f5d45cfc420921bda805f4fc6326d76f33e2c9fee2f7674
