[INFO] fetching crate elba 0.3.0...
[INFO] checking elba-0.3.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate elba 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate elba 0.3.0 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 elba 0.3.0
[INFO] finished tweaking crates.io crate elba 0.3.0
[INFO] tweaked toml for crates.io crate elba 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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] acf7557e891cc59fce544b891f436956e241cc0e39f629c4f393ef3e05668ef3
[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" "acf7557e891cc59fce544b891f436956e241cc0e39f629c4f393ef3e05668ef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acf7557e891cc59fce544b891f436956e241cc0e39f629c4f393ef3e05668ef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acf7557e891cc59fce544b891f436956e241cc0e39f629c4f393ef3e05668ef3", kill_on_drop: false }`
[INFO] [stdout] acf7557e891cc59fce544b891f436956e241cc0e39f629c4f393ef3e05668ef3
[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" "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] 7db862552c5dc3dd9ff4e4725f5c14dd4ce6fd8cf1a02916b7d9a87b8482ace3
[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" "7db862552c5dc3dd9ff4e4725f5c14dd4ce6fd8cf1a02916b7d9a87b8482ace3", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking symlink v0.1.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling curl-sys v0.4.49+curl-7.79.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking unreachable v1.0.0
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[INFO] [stderr]     Checking rand_hc v0.1.0
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[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking generic-array v0.9.1
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking tar v0.4.37
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking rand v0.6.5
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[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking slog-async v2.7.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking slog-term v2.8.0
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking serde-hjson v0.8.2
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]     Checking backtrace v0.3.61
[INFO] [stderr]     Checking config v0.9.3
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking hyper v0.12.36
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking semver_constraints v0.1.0
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]     Checking git2 v0.7.5
[INFO] [stderr]     Checking elba v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib/retrieve/cache.rs:370:10
[INFO] [stdout]     |
[INFO] [stdout] 370 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib/util/git.rs:372:14
[INFO] [stdout]     |
[INFO] [stdout] 372 |     cb: &mut FnMut(git2::FetchOptions) -> Res<T>,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(git2::FetchOptions) -> Res<T>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib/retrieve/cache.rs:370:10
[INFO] [stdout]     |
[INFO] [stdout] 370 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib/util/git.rs:372:14
[INFO] [stdout]     |
[INFO] [stdout] 372 |     cb: &mut FnMut(git2::FetchOptions) -> Res<T>,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(git2::FetchOptions) -> Res<T>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib/retrieve/mod.rs:205:28
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let locked = self.lockfile.find_by(|sum| sum.id.lowkey_eq(pkg));
[INFO] [stdout]     |                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 205 |                     return self
[INFO] [stdout]     |                            ^^^^ mutable borrow occurs here
[INFO] [stdout] 206 |                         .select(&Summary::new(pkg.clone(), v.clone()))
[INFO] [stdout]     |                                                            - immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib/retrieve/mod.rs:205:28
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let locked = self.lockfile.find_by(|sum| sum.id.lowkey_eq(pkg));
[INFO] [stdout]     |                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 205 |                     return self
[INFO] [stdout]     |                            ^^^^ mutable borrow occurs here
[INFO] [stdout] 206 |                         .select(&Summary::new(pkg.clone(), v.clone()))
[INFO] [stdout]     |                                                            - immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 59s
[INFO] running `Command { std: "docker" "inspect" "7db862552c5dc3dd9ff4e4725f5c14dd4ce6fd8cf1a02916b7d9a87b8482ace3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db862552c5dc3dd9ff4e4725f5c14dd4ce6fd8cf1a02916b7d9a87b8482ace3", kill_on_drop: false }`
[INFO] [stdout] 7db862552c5dc3dd9ff4e4725f5c14dd4ce6fd8cf1a02916b7d9a87b8482ace3
