[INFO] updating cached repository https://github.com/Refefer/pairwizer
[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] 3e897ff342136a12279125c75612b2246df03b13
[INFO] checking Refefer/pairwizer against try#e60d9e09c55855f5a848fde8ad83e13131a5b241 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRefefer%2Fpairwizer" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Refefer/pairwizer on toolchain e60d9e09c55855f5a848fde8ad83e13131a5b241
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Refefer/pairwizer
[INFO] finished tweaking git repo https://github.com/Refefer/pairwizer
[INFO] tweaked toml for git repo https://github.com/Refefer/pairwizer written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Refefer/pairwizer already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 388c9fb8898017ca6b705f18251f47b899324516d76564d2a6b64bba967a317a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "388c9fb8898017ca6b705f18251f47b899324516d76564d2a6b64bba967a317a"`
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking heap v0.1.0
[INFO] [stderr]     Checking thread_local v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking console v0.9.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking indicatif v0.13.0
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking pairwizer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/chashmap.rs:8:25
[INFO] [stderr]   |
[INFO] [stderr] 8 | use hashbrown::{HashMap,HashSet};
[INFO] [stderr]   |                         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/chashmap.rs:8:25
[INFO] [stderr]   |
[INFO] [stderr] 8 | use hashbrown::{HashMap,HashSet};
[INFO] [stderr]   |                         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/chashmap.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn update<F: Fn(Option<&V>) -> V>(&self, key: &K, f: F) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cache`
[INFO] [stderr]   --> src/chashmap.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn cache(&self, keys: impl Iterator<Item=K>) -> HashMap<K,V> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/chashmap.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn update<F: Fn(Option<&V>) -> V>(&self, key: &K, f: F) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cache`
[INFO] [stderr]   --> src/chashmap.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn cache(&self, keys: impl Iterator<Item=K>) -> HashMap<K,V> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.81s
[INFO] running `"docker" "inspect" "388c9fb8898017ca6b705f18251f47b899324516d76564d2a6b64bba967a317a"`
[INFO] running `"docker" "rm" "-f" "388c9fb8898017ca6b705f18251f47b899324516d76564d2a6b64bba967a317a"`
[INFO] [stdout] 388c9fb8898017ca6b705f18251f47b899324516d76564d2a6b64bba967a317a