[INFO] cloning repository https://github.com/longfangsong/mini-kv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/longfangsong/mini-kv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fmini-kv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fmini-kv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8e29d7435340fb7ddec5da1e10656902587c1ce
[INFO] checking longfangsong/mini-kv against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fmini-kv" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/longfangsong/mini-kv on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/longfangsong/mini-kv
[INFO] finished tweaking git repo https://github.com/longfangsong/mini-kv
[INFO] tweaked toml for git repo https://github.com/longfangsong/mini-kv written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/longfangsong/mini-kv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2dd69da613036c5d91632c3b7f4dc232ab47f4a34bdcf782002fb1f604452a2
[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" "d2dd69da613036c5d91632c3b7f4dc232ab47f4a34bdcf782002fb1f604452a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2dd69da613036c5d91632c3b7f4dc232ab47f4a34bdcf782002fb1f604452a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2dd69da613036c5d91632c3b7f4dc232ab47f4a34bdcf782002fb1f604452a2", kill_on_drop: false }`
[INFO] [stdout] d2dd69da613036c5d91632c3b7f4dc232ab47f4a34bdcf782002fb1f604452a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41db071dc9b5b8917bd9d08030d4e1f44da5448b1da98a9331a6c265c7c79097
[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" "41db071dc9b5b8917bd9d08030d4e1f44da5448b1da98a9331a6c265c7c79097", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling bindgen v0.51.1
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking rgb v0.8.17
[INFO] [stderr]     Checking str_stack v0.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling cpp_demangle v0.2.15
[INFO] [stderr]    Compiling symbolic-demangle v6.1.4
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking msvc-demangler v0.7.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
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[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking quick-xml v0.18.1
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling petgraph v0.5.0
[INFO] [stderr]     Checking futures-locks v0.5.0
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]     Checking backtrace-sys v0.1.36
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking debugid v0.5.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.3.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking inferno v0.9.5
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.15
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking thiserror v1.0.15
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking symbolic-common v6.1.4
[INFO] [stderr]    Compiling grpcio-sys v0.5.2
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]    Compiling pprof v0.3.16
[INFO] [stderr]     Checking grpcio v0.5.1
[INFO] [stderr]     Checking rpc v0.1.0 (/opt/rustwide/workdir/rpc)
[INFO] [stderr]     Checking mini-kv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `key` is never read
[INFO] [stdout]   --> src/test/benchmark.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let mut key = [0u8; 8];
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scan`
[INFO] [stdout]   --> src/test/benchmark.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let scan = 0.1;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_scan`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `key` is never read
[INFO] [stdout]   --> src/test/benchmark.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let mut key = [0u8; 8];
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scan`
[INFO] [stdout]   --> src/test/benchmark.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let scan = 0.1;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_scan`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7m 35s
[INFO] running `Command { std: "docker" "inspect" "41db071dc9b5b8917bd9d08030d4e1f44da5448b1da98a9331a6c265c7c79097", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41db071dc9b5b8917bd9d08030d4e1f44da5448b1da98a9331a6c265c7c79097", kill_on_drop: false }`
[INFO] [stdout] 41db071dc9b5b8917bd9d08030d4e1f44da5448b1da98a9331a6c265c7c79097