[INFO] fetching crate metrics-util 0.4.0-alpha.2...
[INFO] checking metrics-util-0.4.0-alpha.2 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate metrics-util 0.4.0-alpha.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate metrics-util 0.4.0-alpha.2 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-util 0.4.0-alpha.2
[INFO] finished tweaking crates.io crate metrics-util 0.4.0-alpha.2
[INFO] tweaked toml for crates.io crate metrics-util 0.4.0-alpha.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de02331e05ab394655a3c31f5e90ae1bfb0d52f5f5e39a2c948ebd6a35d501c7
[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" "de02331e05ab394655a3c31f5e90ae1bfb0d52f5f5e39a2c948ebd6a35d501c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de02331e05ab394655a3c31f5e90ae1bfb0d52f5f5e39a2c948ebd6a35d501c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de02331e05ab394655a3c31f5e90ae1bfb0d52f5f5e39a2c948ebd6a35d501c7", kill_on_drop: false }`
[INFO] [stdout] de02331e05ab394655a3c31f5e90ae1bfb0d52f5f5e39a2c948ebd6a35d501c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14e355b267b136ed786077d5c4cce8b1c7df2e47c5e679b64e4f11d1c30545e9
[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" "14e355b267b136ed786077d5c4cce8b1c7df2e47c5e679b64e4f11d1c30545e9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling serde v1.0.116
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[INFO] [stderr]     Checking scopeguard v1.1.0
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[INFO] [stderr]    Compiling rayon-core v1.8.1
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[INFO] [stderr]     Checking itoa v0.4.6
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[INFO] [stderr]     Checking unicode-width v0.1.8
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[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling metrics v0.13.0-alpha.4
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[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling metrics-macros v0.1.0-alpha.3
[INFO] [stderr]     Checking metrics-util v0.4.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `metrics::Identifier`
[INFO] [stdout]  --> src/debugging.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use metrics::{Identifier, Key, Recorder};
[INFO] [stdout]   |               ^^^^^^^^^^ no `Identifier` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `metrics::Identifier`
[INFO] [stdout]  --> src/registry.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use metrics::Identifier;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^ no `Identifier` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `metrics::Identifier`
[INFO] [stdout]    --> src/layers/mod.rs:102:15
[INFO] [stdout]     |
[INFO] [stdout] 102 | use metrics::{Identifier, Key, Recorder};
[INFO] [stdout]     |               ^^^^^^^^^^ no `Identifier` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `metrics::Identifier`
[INFO] [stdout]  --> src/layers/prefix.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use metrics::{Identifier, Key, Recorder};
[INFO] [stdout]   |               ^^^^^^^^^^ no `Identifier` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/registry.rs:40:46
[INFO] [stdout]    |
[INFO] [stdout] 40 |             mappings: ArcSwap::from(Arc::new(ImmutableHashMap::new())),
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `K`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/layers/prefix.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn prefix_key(&self, key: Key) -> Key {
[INFO] [stdout]    |                                       --- expected `Key` because of return type
[INFO] [stdout] 31 |         key.map_name(|old| format!("{}.{}", self.prefix, old))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         expected enum `Key`, found struct `KeyData`
[INFO] [stdout]    |         help: try using a variant of the expected enum: `metrics::Key::Owned(key.map_name(|old| format!("{}.{}", self.prefix, old)))`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0308, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metrics-util`
[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" "14e355b267b136ed786077d5c4cce8b1c7df2e47c5e679b64e4f11d1c30545e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14e355b267b136ed786077d5c4cce8b1c7df2e47c5e679b64e4f11d1c30545e9", kill_on_drop: false }`
[INFO] [stdout] 14e355b267b136ed786077d5c4cce8b1c7df2e47c5e679b64e4f11d1c30545e9