[INFO] cloning repository https://github.com/rohankumardubey/wickdb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rohankumardubey/wickdb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohankumardubey%2Fwickdb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohankumardubey%2Fwickdb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8e4c6f6a1f284efab49974dd983fff3b3a48383
[INFO] checking rohankumardubey/wickdb against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohankumardubey%2Fwickdb" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rohankumardubey/wickdb on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/rohankumardubey/wickdb
[INFO] finished tweaking git repo https://github.com/rohankumardubey/wickdb
[INFO] tweaked toml for git repo https://github.com/rohankumardubey/wickdb written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rohankumardubey/wickdb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_os v0.2.2
[INFO] [stderr]   Downloaded snap v1.0.0
[INFO] [stderr]   Downloaded rand_xoshiro v0.3.1
[INFO] [stderr]   Downloaded slog-async v2.4.0
[INFO] [stderr]   Downloaded num-derive v0.3.0
[INFO] [stderr]   Downloaded criterion-plot v0.4.0
[INFO] [stderr]   Downloaded tinytemplate v1.0.3
[INFO] [stderr]   Downloaded slog-term v2.5.0
[INFO] [stderr]   Downloaded criterion v0.3.0
[INFO] [stderr]   Downloaded bstr v0.2.9
[INFO] [stderr]   Downloaded csv v1.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63a32ec6a3ff714e8c088371b8d987533e69bdc4fb1eb5603f465453dfa3d19b
[INFO] running `Command { std: "docker" "start" "-a" "63a32ec6a3ff714e8c088371b8d987533e69bdc4fb1eb5603f465453dfa3d19b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63a32ec6a3ff714e8c088371b8d987533e69bdc4fb1eb5603f465453dfa3d19b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63a32ec6a3ff714e8c088371b8d987533e69bdc4fb1eb5603f465453dfa3d19b", kill_on_drop: false }`
[INFO] [stdout] 63a32ec6a3ff714e8c088371b8d987533e69bdc4fb1eb5603f465453dfa3d19b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35cb85df2de8f08e974fdf1c75826fa06b3e6191b7ee51033581ac1d16ccdbc2
[INFO] running `Command { std: "docker" "start" "-a" "35cb85df2de8f08e974fdf1c75826fa06b3e6191b7ee51033581ac1d16ccdbc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling snap v1.0.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking slog-async v2.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.4.0
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand_os v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking criterion-plot v0.4.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking slog-term v2.5.0
[INFO] [stderr]     Checking bstr v0.2.9
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking csv v1.1.2
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking wickdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::slice::Iter` that must be used
[INFO] [stdout]   --> src/compaction.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |         self.base.iter();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let _ = self.base.iter();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::map_or` that must be used
[INFO] [stdout]    --> src/iterator.rs:234:9
[INFO] [stdout]     |
[INFO] [stdout] 234 |         self.derived.as_mut().map_or((), |di| di.next());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the returned value, use `if let` instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _ = self.derived.as_mut().map_or((), |di| di.next());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::map_or` that must be used
[INFO] [stdout]    --> src/iterator.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         self.derived.as_mut().map_or((), |di| di.prev());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the returned value, use `if let` instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let _ = self.derived.as_mut().map_or((), |di| di.prev());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stdout] warning: unused `std::slice::Iter` that must be used
[INFO] [stdout]   --> src/compaction.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |         self.base.iter();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let _ = self.base.iter();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::map_or` that must be used
[INFO] [stdout]    --> src/iterator.rs:234:9
[INFO] [stdout]     |
[INFO] [stdout] 234 |         self.derived.as_mut().map_or((), |di| di.next());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the returned value, use `if let` instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _ = self.derived.as_mut().map_or((), |di| di.next());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::map_or` that must be used
[INFO] [stdout]    --> src/iterator.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         self.derived.as_mut().map_or((), |di| di.prev());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the returned value, use `if let` instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let _ = self.derived.as_mut().map_or((), |di| di.prev());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.12s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.0, snap v1.0.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "35cb85df2de8f08e974fdf1c75826fa06b3e6191b7ee51033581ac1d16ccdbc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35cb85df2de8f08e974fdf1c75826fa06b3e6191b7ee51033581ac1d16ccdbc2", kill_on_drop: false }`
[INFO] [stdout] 35cb85df2de8f08e974fdf1c75826fa06b3e6191b7ee51033581ac1d16ccdbc2
