[INFO] cloning repository https://github.com/emschwartz/metrics-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emschwartz/metrics-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femschwartz%2Fmetrics-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femschwartz%2Fmetrics-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 27999d341af290f7011cd28e0c00e98bc64475d6
[INFO] checking emschwartz/metrics-experiment against 1.95.0-beta.7 for beta-1.95-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femschwartz%2Fmetrics-experiment" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/emschwartz/metrics-experiment
[INFO] finished tweaking git repo https://github.com/emschwartz/metrics-experiment
[INFO] tweaked toml for git repo https://github.com/emschwartz/metrics-experiment written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/emschwartz/metrics-experiment on toolchain 1.95.0-beta.7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0-beta.7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/emschwartz/metrics-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0-beta.7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded metrics v0.20.1
[INFO] [stderr]   Downloaded quanta v0.10.1
[INFO] [stderr]   Downloaded ordered-float v2.10.0
[INFO] [stderr]   Downloaded metrics-macros v0.6.0
[INFO] [stderr]   Downloaded sketches-ddsketch v0.2.0
[INFO] [stderr]   Downloaded sync_wrapper v0.1.1
[INFO] [stderr]   Downloaded metrics-tracing-context v0.12.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.37
[INFO] [stderr]   Downloaded async-trait v0.1.59
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[INFO] [stderr]   Downloaded raw-cpuid v10.6.0
[INFO] [stderr]   Downloaded bumpalo v3.11.1
[INFO] [stderr]   Downloaded metrics-util v0.14.0
[INFO] [stderr]   Downloaded const_format_proc_macros v0.2.29
[INFO] [stderr]   Downloaded parking_lot_core v0.9.5
[INFO] [stderr]   Downloaded axum-core v0.3.0
[INFO] [stderr]   Downloaded matchit v0.7.0
[INFO] [stderr]   Downloaded rustversion v1.0.9
[INFO] [stderr]   Downloaded ipnet v2.7.0
[INFO] [stderr]   Downloaded thiserror v1.0.37
[INFO] [stderr]   Downloaded metrics-exporter-prometheus v0.11.0
[INFO] [stderr]   Downloaded lockfree-object-pool v0.1.3
[INFO] [stderr]   Downloaded serde_json v1.0.89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0-beta.7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1537aa315797f6bc38460efe7746efdef396c6357aa0cd9fad4ccb8f26946979
[INFO] running `Command { std: "docker" "start" "-a" "1537aa315797f6bc38460efe7746efdef396c6357aa0cd9fad4ccb8f26946979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1537aa315797f6bc38460efe7746efdef396c6357aa0cd9fad4ccb8f26946979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1537aa315797f6bc38460efe7746efdef396c6357aa0cd9fad4ccb8f26946979", kill_on_drop: false }`
[INFO] [stdout] 1537aa315797f6bc38460efe7746efdef396c6357aa0cd9fad4ccb8f26946979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0-beta.7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87d51ef51a701044400a7af9dffe32b6508ee1790775f47d3c688a40a33ca6de
[INFO] running `Command { std: "docker" "start" "-a" "87d51ef51a701044400a7af9dffe32b6508ee1790775f47d3c688a40a33ca6de", kill_on_drop: false }`
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[INFO] [stderr]    Compiling metrics v0.20.1
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[INFO] [stderr]    Compiling metrics-macros v0.6.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
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[INFO] [stderr]     Checking metrics-util v0.14.0
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking tracing v0.1.37
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[INFO] [stderr]     Checking metrics-exporter-prometheus v0.11.0
[INFO] [stderr]     Checking metrics-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `axum::response::IntoResponse`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use axum::response::IntoResponse;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SystemTime`
[INFO] [stdout]   --> src/main.rs:11:26
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::time::{Instant, SystemTime};
[INFO] [stdout]    |                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Event`, `Level`, `event`, `info`, `span`, and `trace`
[INFO] [stdout]   --> src/main.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tracing::{debug, error, event, info, instrument, span, trace, Event, Level};
[INFO] [stdout]    |                             ^^^^^  ^^^^              ^^^^  ^^^^^  ^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `axum::response::IntoResponse`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use axum::response::IntoResponse;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SystemTime`
[INFO] [stdout]   --> src/main.rs:11:26
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::time::{Instant, SystemTime};
[INFO] [stdout]    |                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Event`, `Level`, `event`, `info`, `span`, and `trace`
[INFO] [stdout]   --> src/main.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tracing::{debug, error, event, info, instrument, span, trace, Event, Level};
[INFO] [stdout]    |                             ^^^^^  ^^^^              ^^^^  ^^^^^  ^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 109 |         Ok(result) => {
[INFO] [stdout]     |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_random_result` is never used
[INFO] [stdout]    --> src/main.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn get_random_result() -> Result<(), ()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 109 |         Ok(result) => {
[INFO] [stdout]     |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_random_result` is never used
[INFO] [stdout]    --> src/main.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn get_random_result() -> Result<(), ()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.58s
[INFO] running `Command { std: "docker" "inspect" "87d51ef51a701044400a7af9dffe32b6508ee1790775f47d3c688a40a33ca6de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87d51ef51a701044400a7af9dffe32b6508ee1790775f47d3c688a40a33ca6de", kill_on_drop: false }`
[INFO] [stdout] 87d51ef51a701044400a7af9dffe32b6508ee1790775f47d3c688a40a33ca6de