[INFO] updating cached repository https://github.com/soaxelbrooke/phrase
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] b01d1737975b74935e67904ea1c2fae212aa04de
[INFO] checking soaxelbrooke/phrase against try#d27c6c6a469a28343396a8f3ac1c9d403aabda69 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsoaxelbrooke%2Fphrase" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/soaxelbrooke/phrase on toolchain d27c6c6a469a28343396a8f3ac1c9d403aabda69
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/soaxelbrooke/phrase
[INFO] finished tweaking git repo https://github.com/soaxelbrooke/phrase
[INFO] tweaked toml for git repo https://github.com/soaxelbrooke/phrase written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/soaxelbrooke/phrase already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4066e616b33f5b29cbff15db76620b71217f223776f1d58da2fde22c74945a29
[INFO] running `"docker" "start" "-a" "4066e616b33f5b29cbff15db76620b71217f223776f1d58da2fde22c74945a29"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling devise_core v0.2.0
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking rust-stemmers v1.1.0
[INFO] [stderr]     Checking notify v4.0.13
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling devise_codegen v0.2.0
[INFO] [stderr]     Checking rayon-core v1.6.0
[INFO] [stderr]    Compiling cookie v0.11.1
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]    Compiling rocket_http v0.4.2
[INFO] [stderr]    Compiling devise v0.2.0
[INFO] [stderr]    Compiling rocket_codegen v0.4.2
[INFO] [stderr]     Checking rocket v0.4.2
[INFO] [stderr]     Checking rocket_contrib v0.4.2
[INFO] [stderr]     Checking phrase v0.3.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `merge_ngrams_into_owned`
[INFO] [stderr]    --> src/main.rs:559:4
[INFO] [stderr]     |
[INFO] [stderr] 559 | fn merge_ngrams_into_owned(from: NGramCounts, into: &mut NGramCounts) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `label_valid`
[INFO] [stderr]     --> src/main.rs:1319:4
[INFO] [stderr]      |
[INFO] [stderr] 1319 | fn label_valid(label: &Option<&String>) -> bool {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `assert_label_valid`
[INFO] [stderr]     --> src/main.rs:1328:4
[INFO] [stderr]      |
[INFO] [stderr] 1328 | fn assert_label_valid(label: &Option<&String>) {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:625:21
[INFO] [stderr]     |
[INFO] [stderr] 625 |                     ngrams[position].try_push_str(&delim);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_ngrams_into_owned`
[INFO] [stderr]    --> src/main.rs:559:4
[INFO] [stderr]     |
[INFO] [stderr] 559 | fn merge_ngrams_into_owned(from: NGramCounts, into: &mut NGramCounts) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `label_valid`
[INFO] [stderr]     --> src/main.rs:1319:4
[INFO] [stderr]      |
[INFO] [stderr] 1319 | fn label_valid(label: &Option<&String>) -> bool {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `assert_label_valid`
[INFO] [stderr]     --> src/main.rs:1328:4
[INFO] [stderr]      |
[INFO] [stderr] 1328 | fn assert_label_valid(label: &Option<&String>) {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:625:21
[INFO] [stderr]     |
[INFO] [stderr] 625 |                     ngrams[position].try_push_str(&delim);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.44s
[INFO] running `"docker" "inspect" "4066e616b33f5b29cbff15db76620b71217f223776f1d58da2fde22c74945a29"`
[INFO] running `"docker" "rm" "-f" "4066e616b33f5b29cbff15db76620b71217f223776f1d58da2fde22c74945a29"`
[INFO] [stdout] 4066e616b33f5b29cbff15db76620b71217f223776f1d58da2fde22c74945a29