[INFO] fetching crate pyroscope_pprofrs 0.2.3...
[INFO] testing pyroscope_pprofrs-0.2.3 against try#015dbcea68b7642e2acc268b5c8f3e9086fc02ff for pr-102570
[INFO] extracting crate pyroscope_pprofrs 0.2.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pyroscope_pprofrs 0.2.3 on toolchain 015dbcea68b7642e2acc268b5c8f3e9086fc02ff
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pyroscope_pprofrs 0.2.3
[INFO] finished tweaking crates.io crate pyroscope_pprofrs 0.2.3
[INFO] tweaked toml for crates.io crate pyroscope_pprofrs 0.2.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 959f118819916b79f2fdaf3c80883873022f3ebc734712bbf03673a971facb9e
[INFO] running `Command { std: "docker" "start" "-a" "959f118819916b79f2fdaf3c80883873022f3ebc734712bbf03673a971facb9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "959f118819916b79f2fdaf3c80883873022f3ebc734712bbf03673a971facb9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "959f118819916b79f2fdaf3c80883873022f3ebc734712bbf03673a971facb9e", kill_on_drop: false }`
[INFO] [stdout] 959f118819916b79f2fdaf3c80883873022f3ebc734712bbf03673a971facb9e
[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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6b56b3af2abe46b5422f930e0c09fce2a5e54e03d762079c9289e9fd7cfa9ea
[INFO] running `Command { std: "docker" "start" "-a" "e6b56b3af2abe46b5422f930e0c09fce2a5e54e03d762079c9289e9fd7cfa9ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-sink v0.3.25
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling futures-io v0.3.25
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]    Compiling rustls v0.20.7
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling os_str_bytes v6.3.1
[INFO] [stderr]    Compiling http-body v0.4.5
[INFO] [stderr]    Compiling form_urlencoded v1.1.0
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]    Compiling unicode-bidi v0.3.8
[INFO] [stderr]    Compiling uuid v1.2.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling num_cpus v1.14.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling openssl-sys v0.9.77
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rustls-pemfile v1.0.1
[INFO] [stderr]    Compiling debugid v0.8.0
[INFO] [stderr]    Compiling findshlibs v0.10.2
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling idna v0.3.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling memmap2 v0.5.7
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling gimli v0.26.2
[INFO] [stderr]    Compiling names v0.13.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling symbolic-demangle v9.2.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling url v2.3.1
[INFO] [stderr]    Compiling symbolic-common v9.2.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling miniz_oxide v0.5.4
[INFO] [stderr]    Compiling rustls-native-certs v0.6.2
[INFO] [stderr]    Compiling object v0.29.0
[INFO] [stderr]    Compiling ipnet v2.5.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling pprof v0.10.1
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling webpki v0.22.0
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling nix v0.24.2
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.37
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]    Compiling tokio-util v0.7.4
[INFO] [stderr]    Compiling tokio-rustls v0.23.4
[INFO] [stderr]    Compiling h2 v0.3.15
[INFO] [stderr]    Compiling clap v3.2.23
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling hyper v0.14.23
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling hyper-rustls v0.23.0
[INFO] [stderr]    Compiling reqwest v0.11.12
[INFO] [stderr]    Compiling pyroscope v0.5.3
[INFO] [stderr]    Compiling pyroscope_pprofrs v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]    --> src/lib.rs:169:26
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn set_config(&self, config: BackendConfig) {}
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.27s
[INFO] running `Command { std: "docker" "inspect" "e6b56b3af2abe46b5422f930e0c09fce2a5e54e03d762079c9289e9fd7cfa9ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6b56b3af2abe46b5422f930e0c09fce2a5e54e03d762079c9289e9fd7cfa9ea", kill_on_drop: false }`
[INFO] [stdout] e6b56b3af2abe46b5422f930e0c09fce2a5e54e03d762079c9289e9fd7cfa9ea
[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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b6e6ef7bd843d7292b38f5f173e01445a8b7fe0a448b1afa0698d7376f3fc61
[INFO] running `Command { std: "docker" "start" "-a" "6b6e6ef7bd843d7292b38f5f173e01445a8b7fe0a448b1afa0698d7376f3fc61", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling openssl-sys v0.9.77
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling futures-io v0.3.25
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.25
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling rustls v0.20.7
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling form_urlencoded v1.1.0
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling unicode-bidi v0.3.8
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling os_str_bytes v6.3.1
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling uuid v1.2.1
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling debugid v0.8.0
[INFO] [stderr]    Compiling rustls-pemfile v1.0.1
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling http-body v0.4.5
[INFO] [stderr]    Compiling encoding_rs v0.8.31
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling gimli v0.26.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling num_cpus v1.14.0
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling memmap2 v0.5.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling idna v0.3.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling symbolic-demangle v9.2.1
[INFO] [stderr]    Compiling clap v3.2.23
[INFO] [stderr]    Compiling url v2.3.1
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling webpki v0.22.0
[INFO] [stderr]    Compiling symbolic-common v9.2.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling miniz_oxide v0.5.4
[INFO] [stderr]    Compiling names v0.13.0
[INFO] [stderr]    Compiling findshlibs v0.10.2
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling rustls-native-certs v0.6.2
[INFO] [stderr]    Compiling object v0.29.0
[INFO] [stderr]    Compiling ipnet v2.5.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling pprof v0.10.1
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling nix v0.24.2
[INFO] [stderr]    Compiling tokio-util v0.7.4
[INFO] [stderr]    Compiling tokio-rustls v0.23.4
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.15
[INFO] [stderr]    Compiling hyper v0.14.23
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling hyper-rustls v0.23.0
[INFO] [stderr]    Compiling reqwest v0.11.12
[INFO] [stderr]    Compiling pyroscope v0.5.3
[INFO] [stderr]    Compiling pyroscope_pprofrs v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]    --> src/lib.rs:169:26
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn set_config(&self, config: BackendConfig) {}
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]    --> src/lib.rs:169:26
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn set_config(&self, config: BackendConfig) {}
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 1m 26s
[INFO] running `Command { std: "docker" "inspect" "6b6e6ef7bd843d7292b38f5f173e01445a8b7fe0a448b1afa0698d7376f3fc61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b6e6ef7bd843d7292b38f5f173e01445a8b7fe0a448b1afa0698d7376f3fc61", kill_on_drop: false }`
[INFO] [stdout] 6b6e6ef7bd843d7292b38f5f173e01445a8b7fe0a448b1afa0698d7376f3fc61
[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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b220618558c5e5eec73bba5a9ef9de44c12017c4e446f783237ae99da5eaa71f
[INFO] running `Command { std: "docker" "start" "-a" "b220618558c5e5eec73bba5a9ef9de44c12017c4e446f783237ae99da5eaa71f", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling rustls v0.20.7
[INFO] [stderr]    Compiling webpki v0.22.0
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling tokio-rustls v0.23.4
[INFO] [stderr]    Compiling hyper-rustls v0.23.0
[INFO] [stderr]    Compiling reqwest v0.11.12
[INFO] [stderr]    Compiling pyroscope v0.5.3
[INFO] [stderr]    Compiling pyroscope_pprofrs v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]    --> src/lib.rs:169:26
[INFO] [stderr]     |
[INFO] [stderr] 169 |     fn set_config(&self, config: BackendConfig) {}
[INFO] [stderr]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `pyroscope_pprofrs` (lib) generated 1 warning (run `cargo fix --lib -p pyroscope_pprofrs` to apply 1 suggestion)
[INFO] [stderr] warning: `pyroscope_pprofrs` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 28.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/pyroscope_pprofrs-7317f8ef67a3e18d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests pyroscope_pprofrs
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b220618558c5e5eec73bba5a9ef9de44c12017c4e446f783237ae99da5eaa71f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b220618558c5e5eec73bba5a9ef9de44c12017c4e446f783237ae99da5eaa71f", kill_on_drop: false }`
[INFO] [stdout] b220618558c5e5eec73bba5a9ef9de44c12017c4e446f783237ae99da5eaa71f