[INFO] fetching crate serde_traitobject 0.2.7...
[INFO] testing serde_traitobject-0.2.7 against 1.60.0 for beta-1.61-1
[INFO] extracting crate serde_traitobject 0.2.7 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate serde_traitobject 0.2.7 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_traitobject 0.2.7
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate serde_traitobject 0.2.7
[INFO] tweaked toml for crates.io crate serde_traitobject 0.2.7 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scoped-tls v1.0.0
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.30
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.30
[INFO] [stderr]   Downloaded heapless v0.5.6
[INFO] [stderr]   Downloaded erased-serde v0.3.20
[INFO] [stderr]   Downloaded palaver v0.2.8
[INFO] [stderr]   Downloaded metatype v0.2.1
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded nix v0.15.0
[INFO] [stderr]   Downloaded build_id v0.2.1
[INFO] [stderr]   Downloaded relative v0.2.2
[INFO] [stderr]   Downloaded serde_closure_derive v0.3.2
[INFO] [stderr]   Downloaded procinfo v0.4.2
[INFO] [stderr]   Downloaded nom v2.2.1
[INFO] [stderr]   Downloaded serde_closure v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] a2a98d03cbd4be5c6432c4b558c3469559634ee1121bfd6ba9628cc100c273c5
[INFO] running `Command { std: "docker" "start" "-a" "a2a98d03cbd4be5c6432c4b558c3469559634ee1121bfd6ba9628cc100c273c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2a98d03cbd4be5c6432c4b558c3469559634ee1121bfd6ba9628cc100c273c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2a98d03cbd4be5c6432c4b558c3469559634ee1121bfd6ba9628cc100c273c5", kill_on_drop: false }`
[INFO] [stdout] a2a98d03cbd4be5c6432c4b558c3469559634ee1121bfd6ba9628cc100c273c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] f300a36f4756e5a57c1a038ce29a566212073c59f7f00035cd724d19326f1c33
[INFO] running `Command { std: "docker" "start" "-a" "f300a36f4756e5a57c1a038ce29a566212073c59f7f00035cd724d19326f1c33", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]    Compiling metatype v0.2.1
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling twox-hash v1.6.2
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling serde v1.0.136
[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/metatype-0.2.1/src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/metatype-0.2.1/src/lib.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/metatype-0.2.1/src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `metatype` due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f300a36f4756e5a57c1a038ce29a566212073c59f7f00035cd724d19326f1c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f300a36f4756e5a57c1a038ce29a566212073c59f7f00035cd724d19326f1c33", kill_on_drop: false }`
[INFO] [stdout] f300a36f4756e5a57c1a038ce29a566212073c59f7f00035cd724d19326f1c33