[INFO] cloning repository https://github.com/fvkramer/kv-client
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fvkramer/kv-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffvkramer%2Fkv-client"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffvkramer%2Fkv-client'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 038cf5dd959dee4bdd09b6689ed978daa9552199
[INFO] checking fvkramer/kv-client against try#4662032ab74cd44d423120d08d251dfead4914a0 for pr-72788
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffvkramer%2Fkv-client" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fvkramer/kv-client on toolchain 4662032ab74cd44d423120d08d251dfead4914a0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fvkramer/kv-client
[INFO] finished tweaking git repo https://github.com/fvkramer/kv-client
[INFO] tweaked toml for git repo https://github.com/fvkramer/kv-client written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/fvkramer/kv-client already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4662032ab74cd44d423120d08d251dfead4914a0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+4662032ab74cd44d423120d08d251dfead4914a0" "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] 1dfe0640e130d991fd62a894109356fa097bfbb6aee5fcb65d34f55511e28273
[INFO] running `"docker" "start" "-a" "1dfe0640e130d991fd62a894109356fa097bfbb6aee5fcb65d34f55511e28273"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Checking cfg-if v0.1.9
[INFO] [stderr] Compiling unicode-xid v0.1.0
[INFO] [stderr] Compiling syn v0.15.35
[INFO] [stderr] Compiling slog v2.5.2
[INFO] [stderr] Checking rustc-demangle v0.1.15
[INFO] [stderr] Compiling regex v1.1.7
[INFO] [stderr] Checking take_mut v0.2.2
[INFO] [stderr] Checking either v1.5.3
[INFO] [stderr] Checking ucd-util v0.1.3
[INFO] [stderr] Compiling escargot v0.4.0
[INFO] [stderr] Checking predicates-core v1.0.0
[INFO] [stderr] Checking utf8-ranges v1.0.3
[INFO] [stderr] Checking difference v2.0.0
[INFO] [stderr] Checking treeline v0.1.0
[INFO] [stderr] Checking normalize-line-endings v0.2.2
[INFO] [stderr] Checking remove_dir_all v0.5.1
[INFO] [stderr] Compiling num-traits v0.2.8
[INFO] [stderr] Compiling backtrace v0.3.30
[INFO] [stderr] Checking rand_jitter v0.1.4
[INFO] [stderr] Checking walkdir v2.2.8
[INFO] [stderr] Checking log v0.4.6
[INFO] [stderr] Checking itertools v0.8.2
[INFO] [stderr] Checking predicates-tree v1.0.0
[INFO] [stderr] Compiling proc-macro2 v0.4.30
[INFO] [stderr] Checking regex-syntax v0.6.7
[INFO] [stderr] Checking crossbeam-utils v0.7.0
[INFO] [stderr] Checking rand_pcg v0.1.2
[INFO] [stderr] Checking rand_chacha v0.1.1
[INFO] [stderr] Checking memchr v2.2.0
[INFO] [stderr] Checking dirs-sys v0.3.4
[INFO] [stderr] Checking num_cpus v1.11.1
[INFO] [stderr] Checking rand_os v0.1.3
[INFO] [stderr] Compiling cast v0.2.3
[INFO] [stderr] Checking backtrace-sys v0.1.28
[INFO] [stderr] Checking regex-automata v0.1.8
[INFO] [stderr] Checking rand_xoshiro v0.1.0
[INFO] [stderr] Checking clap v2.33.0
[INFO] [stderr] Checking dirs v2.0.2
[INFO] [stderr] Checking rand v0.6.5
[INFO] [stderr] Checking term v0.6.1
[INFO] [stderr] Checking serde_json v1.0.44
[INFO] [stderr] Checking crossbeam-epoch v0.8.0
[INFO] [stderr] Checking crossbeam-queue v0.2.1
[INFO] [stderr] Checking aho-corasick v0.7.3
[INFO] [stderr] Checking csv-core v0.1.6
[INFO] [stderr] Checking bstr v0.2.8
[INFO] [stderr] Checking slog-async v2.3.0
[INFO] [stderr] Compiling quote v0.6.12
[INFO] [stderr] Checking crossbeam-deque v0.7.2
[INFO] [stderr] Checking rayon-core v1.7.0
[INFO] [stderr] Checking criterion-plot v0.3.1
[INFO] [stderr] Checking rayon v1.3.0
[INFO] [stderr] Checking num-integer v0.1.41
[INFO] [stderr] Checking float-cmp v0.4.0
[INFO] [stderr] Checking csv v1.1.1
[INFO] [stderr] Checking tempfile v3.0.8
[INFO] [stderr] Checking chrono v0.4.10
[INFO] [stderr] Checking tinytemplate v1.0.3
[INFO] [stderr] Checking slog-term v2.4.2
[INFO] [stderr] Checking predicates v1.0.1
[INFO] [stderr] Checking criterion v0.2.11
[INFO] [stderr] Compiling synstructure v0.10.2
[INFO] [stderr] Checking assert_cmd v0.11.1
[INFO] [stderr] Compiling failure_derive v0.1.5
[INFO] [stderr] Checking failure v0.1.5
[INFO] [stderr] Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr] --> src/kv.rs:16:23
[INFO] [stderr] |
[INFO] [stderr] 16 | fn set(&mut self, key: String, value: String) -> Result<()> {
[INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] |
[INFO] [stderr] = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr] --> src/kv.rs:16:36
[INFO] [stderr] |
[INFO] [stderr] 16 | fn set(&mut self, key: String, value: String) -> Result<()> {
[INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr]
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr] --> src/kv.rs:20:23
[INFO] [stderr] |
[INFO] [stderr] 20 | fn get(&mut self, key: String) -> Result