[INFO] updating cached repository https://github.com/rust-corpus/top-crates
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3022cc1d58fbee3d7cb2dc9fe40cd33d8ed90e6e
[INFO] testing rust-corpus/top-crates against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-corpus%2Ftop-crates" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-corpus/top-crates on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/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 `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] d7598cc10b86577c97ae8b1acf19034a4f18bec0e8facf8642bf7c5c12878bfa
[INFO] running `"docker" "start" "-a" "d7598cc10b86577c97ae8b1acf19034a4f18bec0e8facf8642bf7c5c12878bfa"`
[INFO] [stderr]    Compiling arrayvec v0.4.9
[INFO] [stderr]    Compiling home v0.3.3
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]    Compiling backtrace-sys v0.1.26
[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 semver v0.9.0
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling jobserver v0.1.12
[INFO] [stderr]    Compiling tar v0.4.20
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling globset v0.4.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling openssl v0.10.16
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.0
[INFO] [stderr]    Compiling flate2 v1.0.6
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling opener v0.3.2
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.9
[INFO] [stderr]    Compiling tempfile v3.0.5
[INFO] [stderr]    Compiling crypto-hash v0.3.1
[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 parking_lot v0.7.0
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling crossbeam-channel v0.3.4
[INFO] [stderr]    Compiling rustfix v0.4.4
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling ignore v0.4.5
[INFO] [stderr]    Compiling hyper v0.12.19
[INFO] [stderr]    Compiling curl v0.4.19
[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] [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: method is never used: `version`
[INFO] [stderr]    --> src/main.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn version(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `blacklisted`
[INFO] [stderr]    --> src/main.rs:131:5
[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:178:1
[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:217:1
[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:285:1
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn write_manifest(manifest: TomlManifest, path: &str) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 57s
[INFO] running `"docker" "inspect" "d7598cc10b86577c97ae8b1acf19034a4f18bec0e8facf8642bf7c5c12878bfa"`
[INFO] running `"docker" "rm" "-f" "d7598cc10b86577c97ae8b1acf19034a4f18bec0e8facf8642bf7c5c12878bfa"`
[INFO] [stdout] d7598cc10b86577c97ae8b1acf19034a4f18bec0e8facf8642bf7c5c12878bfa
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 81ba3d02574c482c6000c15fdcc9133db71055de7bf78ee49996126991aad43c
[INFO] running `"docker" "start" "-a" "81ba3d02574c482c6000c15fdcc9133db71055de7bf78ee49996126991aad43c"`
[INFO] [stderr]    Compiling top-crates v0.1.0 (/opt/rustwide/workdir)
[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: method is never used: `version`
[INFO] [stderr]    --> src/main.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn version(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `blacklisted`
[INFO] [stderr]    --> src/main.rs:131:5
[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:178:1
[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:217:1
[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:285:1
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn write_manifest(manifest: TomlManifest, path: &str) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.97s
[INFO] running `"docker" "inspect" "81ba3d02574c482c6000c15fdcc9133db71055de7bf78ee49996126991aad43c"`
[INFO] running `"docker" "rm" "-f" "81ba3d02574c482c6000c15fdcc9133db71055de7bf78ee49996126991aad43c"`
[INFO] [stdout] 81ba3d02574c482c6000c15fdcc9133db71055de7bf78ee49996126991aad43c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 778c399f7ee198b1f8e72dde9d392357b3d1e14a6cad38eccd61890a09ddd61f
[INFO] running `"docker" "start" "-a" "778c399f7ee198b1f8e72dde9d392357b3d1e14a6cad38eccd61890a09ddd61f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/top_crates-2c5a070a6c44f83d
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "778c399f7ee198b1f8e72dde9d392357b3d1e14a6cad38eccd61890a09ddd61f"`
[INFO] running `"docker" "rm" "-f" "778c399f7ee198b1f8e72dde9d392357b3d1e14a6cad38eccd61890a09ddd61f"`
[INFO] [stdout] 778c399f7ee198b1f8e72dde9d392357b3d1e14a6cad38eccd61890a09ddd61f