[INFO] cloning repository https://github.com/rust-corpus/top-crates
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-corpus/top-crates" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-corpus%2Ftop-crates", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-corpus%2Ftop-crates'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3022cc1d58fbee3d7cb2dc9fe40cd33d8ed90e6e
[INFO] testing rust-corpus/top-crates against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-corpus%2Ftop-crates" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-corpus/top-crates 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 git repo https://github.com/rust-corpus/top-crates
[INFO] finished tweaking git repo https://github.com/rust-corpus/top-crates
[INFO] tweaked toml for git repo https://github.com/rust-corpus/top-crates written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-corpus/top-crates already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.82
[INFO] [stderr]   Downloaded globset v0.4.2
[INFO] [stderr]   Downloaded git2-curl v0.8.2
[INFO] [stderr]   Downloaded fwdansi v1.0.1
[INFO] [stderr]   Downloaded crossbeam-channel v0.3.4
[INFO] [stderr]   Downloaded crypto-hash v0.3.1
[INFO] [stderr]   Downloaded core-foundation v0.6.3
[INFO] [stderr]   Downloaded miniz_oxide_c_api v0.2.0
[INFO] [stderr]   Downloaded miniz_oxide v0.2.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.44
[INFO] [stderr]   Downloaded http v0.1.14
[INFO] [stderr]   Downloaded hyper v0.12.19
[INFO] [stderr]   Downloaded tokio v0.1.13
[INFO] [stderr]   Downloaded crossbeam-utils v0.6.3
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.9
[INFO] [stderr]   Downloaded tokio-reactor v0.1.7
[INFO] [stderr]   Downloaded encoding_rs v0.8.13
[INFO] [stderr]   Downloaded serde_json v1.0.33
[INFO] [stderr]   Downloaded tokio-executor v0.1.5
[INFO] [stderr]   Downloaded tokio-io v0.1.10
[INFO] [stderr]   Downloaded tokio-uds v0.2.4
[INFO] [stderr]   Downloaded jobserver v0.1.12
[INFO] [stderr]   Downloaded opener v0.3.2
[INFO] [stderr]   Downloaded arrayvec v0.4.9
[INFO] [stderr]   Downloaded backtrace-sys v0.1.26
[INFO] [stderr]   Downloaded h2 v0.1.14
[INFO] [stderr]   Downloaded time v0.1.41
[INFO] [stderr]   Downloaded libflate v0.1.19
[INFO] [stderr]   Downloaded serde_derive v1.0.82
[INFO] [stderr]   Downloaded syn v0.15.23
[INFO] [stderr]   Downloaded rand_xorshift v0.1.0
[INFO] [stderr]   Downloaded tokio-tcp v0.1.2
[INFO] [stderr]   Downloaded curl v0.4.19
[INFO] [stderr]   Downloaded home v0.3.3
[INFO] [stderr]   Downloaded curl-sys v0.4.15
[INFO] [stderr]   Downloaded git2 v0.7.5
[INFO] [stderr]   Downloaded rustfix v0.4.4
[INFO] [stderr]   Downloaded crates-io v0.19.0
[INFO] [stderr]   Downloaded cc v1.0.27
[INFO] [stderr]   Downloaded parking_lot v0.7.0
[INFO] [stderr]   Downloaded ignore v0.4.5
[INFO] [stderr]   Downloaded tokio-fs v0.1.4
[INFO] [stderr]   Downloaded rand_chacha v0.1.0
[INFO] [stderr]   Downloaded reqwest v0.9.5
[INFO] [stderr]   Downloaded libc v0.2.45
[INFO] [stderr]   Downloaded cargo v0.31.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.11
[INFO] [stderr]   Downloaded tar v0.4.20
[INFO] [stderr]   Downloaded hyper-tls v0.3.1
[INFO] [stderr]   Downloaded rand v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 9a67b1ff47d10fffb400539c3b447a9fce29d73405f980c11f4f53a2a7b2886b
[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" "9a67b1ff47d10fffb400539c3b447a9fce29d73405f980c11f4f53a2a7b2886b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a67b1ff47d10fffb400539c3b447a9fce29d73405f980c11f4f53a2a7b2886b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a67b1ff47d10fffb400539c3b447a9fce29d73405f980c11f4f53a2a7b2886b", kill_on_drop: false }`
[INFO] [stdout] 9a67b1ff47d10fffb400539c3b447a9fce29d73405f980c11f4f53a2a7b2886b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "build" "--frozen" "--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] 5776c359710126e02dfc461516e96716933137fbcef25dca9ceeae9046f464e5
[INFO] running `Command { std: "docker" "start" "-a" "5776c359710126e02dfc461516e96716933137fbcef25dca9ceeae9046f464e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling arrayvec v0.4.9
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling home v0.3.3
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling time v0.1.41
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]    Compiling jobserver v0.1.12
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling uuid v0.7.1
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling tar v0.4.20
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling http v0.1.14
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling opener v0.3.2
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling openssl v0.10.16
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling flate2 v1.0.6
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.0
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling h2 v0.1.14
[INFO] [stderr]    Compiling globset v0.4.2
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling crypto-hash v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling serde_urlencoded v0.5.4
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling rustfix v0.4.4
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-uds v0.2.4
[INFO] [stderr]    Compiling tokio-threadpool v0.1.9
[INFO] [stderr]    Compiling tempfile v3.0.5
[INFO] [stderr]    Compiling parking_lot v0.7.0
[INFO] [stderr]    Compiling crossbeam-channel v0.3.4
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling curl v0.4.19
[INFO] [stderr]    Compiling ignore v0.4.5
[INFO] [stderr]    Compiling hyper v0.12.19
[INFO] [stderr]    Compiling crates-io v0.19.0
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling reqwest v0.9.5
[INFO] [stderr]    Compiling git2 v0.7.5
[INFO] [stderr]    Compiling git2-curl v0.8.2
[INFO] [stderr]    Compiling cargo v0.31.0
[INFO] [stderr]    Compiling top-crates v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/main.rs:11:44
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::{BTreeMap, BTreeSet, HashSet};
[INFO] [stdout]    |                                            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cargo::core::registry::PackageRegistry`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use cargo::core::registry::PackageRegistry;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Method`, `self`
[INFO] [stdout]   --> src/main.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | use cargo::core::resolver::{self, Method, Resolve};
[INFO] [stdout]    |                             ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Explicit`
[INFO] [stdout]    --> src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     Explicit {
[INFO] [stdout] 101 | |         #[serde(serialize_with = "exact_version")]
[INFO] [stdout] 102 | |         version: String,
[INFO] [stdout] 103 | |         #[serde(skip_serializing_if = "Vec::is_empty")]
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |         default_features: bool,
[INFO] [stdout] 107 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `version`
[INFO] [stdout]    --> src/main.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn version(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `blacklisted`
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn blacklisted(&self, name: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unique_latest_crates`
[INFO] [stdout]    --> src/main.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn unique_latest_crates(resolve: Resolve) -> BTreeMap<String, DependencySpec> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fill_playground_metadata_features`
[INFO] [stdout]    --> src/main.rs:217:4
[INFO] [stdout]     |
[INFO] [stdout] 217 | fn fill_playground_metadata_features(dep: &mut DependencySpec, pkg: &Package) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_manifest`
[INFO] [stdout]    --> src/main.rs:285:4
[INFO] [stdout]     |
[INFO] [stdout] 285 | fn write_manifest(manifest: TomlManifest, path: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 52s
[INFO] running `Command { std: "docker" "inspect" "5776c359710126e02dfc461516e96716933137fbcef25dca9ceeae9046f464e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5776c359710126e02dfc461516e96716933137fbcef25dca9ceeae9046f464e5", kill_on_drop: false }`
[INFO] [stdout] 5776c359710126e02dfc461516e96716933137fbcef25dca9ceeae9046f464e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "test" "--frozen" "--no-run" "--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] 9a1f567ea73d7763d2414ddff89f9c66773c4b169c3bbed72d8c45af5736adec
[INFO] running `Command { std: "docker" "start" "-a" "9a1f567ea73d7763d2414ddff89f9c66773c4b169c3bbed72d8c45af5736adec", kill_on_drop: false }`
[INFO] [stderr]    Compiling top-crates v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]   --> src/main.rs:11:44
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::{BTreeMap, BTreeSet, HashSet};
[INFO] [stdout]    |                                            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cargo::core::registry::PackageRegistry`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use cargo::core::registry::PackageRegistry;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Method`, `self`
[INFO] [stdout]   --> src/main.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 | use cargo::core::resolver::{self, Method, Resolve};
[INFO] [stdout]    |                             ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Explicit`
[INFO] [stdout]    --> src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     Explicit {
[INFO] [stdout] 101 | |         #[serde(serialize_with = "exact_version")]
[INFO] [stdout] 102 | |         version: String,
[INFO] [stdout] 103 | |         #[serde(skip_serializing_if = "Vec::is_empty")]
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |         default_features: bool,
[INFO] [stdout] 107 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `version`
[INFO] [stdout]    --> src/main.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn version(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `blacklisted`
[INFO] [stdout]    --> src/main.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn blacklisted(&self, name: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unique_latest_crates`
[INFO] [stdout]    --> src/main.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn unique_latest_crates(resolve: Resolve) -> BTreeMap<String, DependencySpec> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fill_playground_metadata_features`
[INFO] [stdout]    --> src/main.rs:217:4
[INFO] [stdout]     |
[INFO] [stdout] 217 | fn fill_playground_metadata_features(dep: &mut DependencySpec, pkg: &Package) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_manifest`
[INFO] [stdout]    --> src/main.rs:285:4
[INFO] [stdout]     |
[INFO] [stdout] 285 | fn write_manifest(manifest: TomlManifest, path: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.25s
[INFO] running `Command { std: "docker" "inspect" "9a1f567ea73d7763d2414ddff89f9c66773c4b169c3bbed72d8c45af5736adec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a1f567ea73d7763d2414ddff89f9c66773c4b169c3bbed72d8c45af5736adec", kill_on_drop: false }`
[INFO] [stdout] 9a1f567ea73d7763d2414ddff89f9c66773c4b169c3bbed72d8c45af5736adec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7e2797f685986f385743981a5ef714b7151cb8471e65d8b983442b1c1512b540
[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" "7e2797f685986f385743981a5ef714b7151cb8471e65d8b983442b1c1512b540", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]   --> src/main.rs:11:44
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::{BTreeMap, BTreeSet, HashSet};
[INFO] [stderr]    |                                            ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cargo::core::registry::PackageRegistry`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use cargo::core::registry::PackageRegistry;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Method`, `self`
[INFO] [stderr]   --> src/main.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 | use cargo::core::resolver::{self, Method, Resolve};
[INFO] [stderr]    |                             ^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `String`
[INFO] [stderr]   --> src/main.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     String(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Explicit`
[INFO] [stderr]    --> src/main.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 | /     Explicit {
[INFO] [stderr] 101 | |         #[serde(serialize_with = "exact_version")]
[INFO] [stderr] 102 | |         version: String,
[INFO] [stderr] 103 | |         #[serde(skip_serializing_if = "Vec::is_empty")]
[INFO] [stderr] ...   |
[INFO] [stderr] 106 | |         default_features: bool,
[INFO] [stderr] 107 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `version`
[INFO] [stderr]    --> src/main.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn version(&self) -> String {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `blacklisted`
[INFO] [stderr]    --> src/main.rs:131:8
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn blacklisted(&self, name: &str) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unique_latest_crates`
[INFO] [stderr]    --> src/main.rs:178:4
[INFO] [stderr]     |
[INFO] [stderr] 178 | fn unique_latest_crates(resolve: Resolve) -> BTreeMap<String, DependencySpec> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fill_playground_metadata_features`
[INFO] [stderr]    --> src/main.rs:217:4
[INFO] [stderr]     |
[INFO] [stderr] 217 | fn fill_playground_metadata_features(dep: &mut DependencySpec, pkg: &Package) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_manifest`
[INFO] [stderr]    --> src/main.rs:285:4
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn write_manifest(manifest: TomlManifest, path: &str) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `top-crates` (bin "top-crates" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/top_crates-674f2a65bf44ba8c)
[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" "7e2797f685986f385743981a5ef714b7151cb8471e65d8b983442b1c1512b540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2797f685986f385743981a5ef714b7151cb8471e65d8b983442b1c1512b540", kill_on_drop: false }`
[INFO] [stdout] 7e2797f685986f385743981a5ef714b7151cb8471e65d8b983442b1c1512b540