[INFO] crate openmetrics 0.2.1 is already in cache
[INFO] checking openmetrics-0.2.1 against try#5fdfba63a96c5e8ae0ebf6b8b66853110277087d for pr-73166
[INFO] extracting crate openmetrics 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate openmetrics 0.2.1 on toolchain 5fdfba63a96c5e8ae0ebf6b8b66853110277087d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate openmetrics 0.2.1
[INFO] finished tweaking crates.io crate openmetrics 0.2.1
[INFO] tweaked toml for crates.io crate openmetrics 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "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] 9e395a00d333758ba3af90590e1404d20600cea515cce9feebd6e2f183adf7d5
[INFO] running `Command { std: "docker" "start" "-a" "9e395a00d333758ba3af90590e1404d20600cea515cce9feebd6e2f183adf7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e395a00d333758ba3af90590e1404d20600cea515cce9feebd6e2f183adf7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e395a00d333758ba3af90590e1404d20600cea515cce9feebd6e2f183adf7d5", kill_on_drop: false }`
[INFO] [stdout] 9e395a00d333758ba3af90590e1404d20600cea515cce9feebd6e2f183adf7d5
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5fdfba63a96c5e8ae0ebf6b8b66853110277087d" "check" "--frozen" "--all" "--all-targets" "--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] 6c66d9da0153ee2a1dfb7decfc500af7d2bfc239395e0d6724d740d6cb901a31
[INFO] running `Command { std: "docker" "start" "-a" "6c66d9da0153ee2a1dfb7decfc500af7d2bfc239395e0d6724d740d6cb901a31", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking openmetrics v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn add(metric_name: &str, metric_text: &str) -> Label {
[INFO] [stdout]    |            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn add(metric_name: &str, metric_text: &str) -> Label {
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:61:28
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn new_with_metric(metric_name: &str, metric_text: &str) -> Self {
[INFO] [stdout]    |                            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_text`
[INFO] [stdout]   --> src/metrics.rs:61:47
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn new_with_metric(metric_name: &str, metric_text: &str) -> Self {
[INFO] [stdout]    |                                               ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_text`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn add(metric_name: &str, metric_text: &str) -> Label {
[INFO] [stdout]    |            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn add(metric_name: &str, metric_text: &str) -> Label {
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_name`
[INFO] [stdout]   --> src/metrics.rs:61:28
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn new_with_metric(metric_name: &str, metric_text: &str) -> Self {
[INFO] [stdout]    |                            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metric_text`
[INFO] [stdout]   --> src/metrics.rs:61:47
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn new_with_metric(metric_name: &str, metric_text: &str) -> Self {
[INFO] [stdout]    |                                               ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metric_text`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.56s
[INFO] running `Command { std: "docker" "inspect" "6c66d9da0153ee2a1dfb7decfc500af7d2bfc239395e0d6724d740d6cb901a31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c66d9da0153ee2a1dfb7decfc500af7d2bfc239395e0d6724d740d6cb901a31", kill_on_drop: false }`
[INFO] [stdout] 6c66d9da0153ee2a1dfb7decfc500af7d2bfc239395e0d6724d740d6cb901a31