[INFO] fetching crate loader-rs 0.7.0...
[INFO] testing loader-rs-0.7.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate loader-rs 0.7.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate loader-rs 0.7.0 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] removed /workspace/builds/worker-5/source/rust-toolchain
[INFO] started tweaking crates.io crate loader-rs 0.7.0
[INFO] finished tweaking crates.io crate loader-rs 0.7.0
[INFO] tweaked toml for crates.io crate loader-rs 0.7.0 written to /workspace/builds/worker-5/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 assert-json-diff v2.0.1
[INFO] [stderr]   Downloaded strum_macros v0.24.0
[INFO] [stderr]   Downloaded darling_macro v0.13.4
[INFO] [stderr]   Downloaded join-lazy-fmt v0.9.2
[INFO] [stderr]   Downloaded json-trait-rs v0.11.0
[INFO] [stderr]   Downloaded cached_proc_macro_types v0.1.0
[INFO] [stderr]   Downloaded derive_builder_core v0.11.1
[INFO] [stderr]   Downloaded darling_core v0.13.4
[INFO] [stderr]   Downloaded cached_proc_macro v0.12.0
[INFO] [stderr]   Downloaded derive_builder v0.11.1
[INFO] [stderr]   Downloaded darling v0.13.4
[INFO] [stderr]   Downloaded async_once v0.2.6
[INFO] [stderr]   Downloaded test-case v1.2.3
[INFO] [stderr]   Downloaded mockito v0.31.0
[INFO] [stderr]   Downloaded cached v0.34.0
[INFO] [stderr]   Downloaded strum v0.24.0
[INFO] [stderr]   Downloaded derive_builder_macro v0.11.1
[INFO] [stderr]   Downloaded async-compression v0.3.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 2f41dd937005fbbc2095888d827ae2f8d732c0196ee831db97c995e1512fc467
[INFO] running `Command { std: "docker" "start" "-a" "2f41dd937005fbbc2095888d827ae2f8d732c0196ee831db97c995e1512fc467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f41dd937005fbbc2095888d827ae2f8d732c0196ee831db97c995e1512fc467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f41dd937005fbbc2095888d827ae2f8d732c0196ee831db97c995e1512fc467", kill_on_drop: false }`
[INFO] [stdout] 2f41dd937005fbbc2095888d827ae2f8d732c0196ee831db97c995e1512fc467
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 73bd5dccf300f229843aaf6e19652d09048cecf56e5b7dfb31a90d2066450d30
[INFO] running `Command { std: "docker" "start" "-a" "73bd5dccf300f229843aaf6e19652d09048cecf56e5b7dfb31a90d2066450d30", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling pin-project-lite v0.1.12
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling httparse v1.7.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling parking_lot_core v0.9.2
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]    Compiling cached_proc_macro_types v0.1.0
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling hashbrown v0.12.0
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[INFO] [stderr]    Compiling ipnet v2.4.0
[INFO] [stderr]    Compiling strum v0.24.0
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling tracing-core v0.1.25
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling miniz_oxide v0.5.1
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling http v0.2.6
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling tracing v0.1.33
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[INFO] [stderr]    Compiling flate2 v1.0.23
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]    Compiling parking_lot v0.12.0
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling async-compression v0.3.12
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]    Compiling tokio v1.17.0
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling pin-project v1.0.10
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling cached_proc_macro v0.12.0
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling cached v0.34.0
[INFO] [stderr]    Compiling hyper v0.13.10
[INFO] [stderr]    Compiling hyper-tls v0.4.3
[INFO] [stderr]    Compiling reqwest v0.10.10
[INFO] [stderr]    Compiling loader-rs v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:43:1
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     warnings,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `loader-rs` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "73bd5dccf300f229843aaf6e19652d09048cecf56e5b7dfb31a90d2066450d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73bd5dccf300f229843aaf6e19652d09048cecf56e5b7dfb31a90d2066450d30", kill_on_drop: false }`
[INFO] [stdout] 73bd5dccf300f229843aaf6e19652d09048cecf56e5b7dfb31a90d2066450d30