[INFO] fetching crate muter 0.7.0...
[INFO] checking muter-0.7.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate muter 0.7.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate muter 0.7.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate muter 0.7.0
[INFO] finished tweaking crates.io crate muter 0.7.0
[INFO] tweaked toml for crates.io crate muter 0.7.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate muter 0.7.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded autocfg v0.1.7
[INFO] [stderr]   Downloaded tr v0.1.6
[INFO] [stderr]   Downloaded keccak v0.1.0
[INFO] [stderr]   Downloaded gettext-rs v0.5.0
[INFO] [stderr]   Downloaded locale_config v0.3.0
[INFO] [stderr]   Downloaded pretty_assertions v0.5.1
[INFO] [stderr]   Downloaded multi_reader v0.1.0
[INFO] [stderr]   Downloaded gettext-rs v0.4.4
[INFO] [stderr]   Downloaded md-5 v0.8.0
[INFO] [stderr]   Downloaded blake2 v0.8.1
[INFO] [stderr]   Downloaded blake3 v0.3.4
[INFO] [stderr]   Downloaded sha3 v0.8.2
[INFO] [stderr]   Downloaded locale_config v0.2.3
[INFO] [stderr]   Downloaded gettext-sys v0.19.9
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c97550e2cdd6f5279df527e8ba8cda623f0def00bbedc357f65e10a81f14144a
[INFO] running `Command { std: "docker" "start" "-a" "c97550e2cdd6f5279df527e8ba8cda623f0def00bbedc357f65e10a81f14144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c97550e2cdd6f5279df527e8ba8cda623f0def00bbedc357f65e10a81f14144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c97550e2cdd6f5279df527e8ba8cda623f0def00bbedc357f65e10a81f14144a", kill_on_drop: false }`
[INFO] [stdout] c97550e2cdd6f5279df527e8ba8cda623f0def00bbedc357f65e10a81f14144a
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a9a91b54faf432c934a5e830060979bafe9e94b25cea55337842bc54868d1b0
[INFO] running `Command { std: "docker" "start" "-a" "2a9a91b54faf432c934a5e830060979bafe9e94b25cea55337842bc54868d1b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling muter v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking multi_reader v0.1.0
[INFO] [stderr]    Compiling gettext-sys v0.19.9
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking pretty_assertions v0.5.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking blake2 v0.8.1
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking locale_config v0.3.0
[INFO] [stderr]     Checking locale_config v0.2.3
[INFO] [stderr]     Checking gettext-rs v0.5.0
[INFO] [stderr]     Checking tr v0.1.6
[INFO] [stderr]     Checking gettext-rs v0.4.4
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:281:53
[INFO] [stdout]     |
[INFO] [stdout] 281 |             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 281 -             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 281 +             iter.map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:285:53
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 285 +                 .map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/lib/codec/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:281:53
[INFO] [stdout]     |
[INFO] [stdout] 281 |             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 281 -             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 281 +             iter.map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:285:53
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 285 +                 .map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/lib/codec/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.26s
[INFO] running `Command { std: "docker" "inspect" "2a9a91b54faf432c934a5e830060979bafe9e94b25cea55337842bc54868d1b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a9a91b54faf432c934a5e830060979bafe9e94b25cea55337842bc54868d1b0", kill_on_drop: false }`
[INFO] [stdout] 2a9a91b54faf432c934a5e830060979bafe9e94b25cea55337842bc54868d1b0
[INFO] checking muter-0.7.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate muter 0.7.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate muter 0.7.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate muter 0.7.0
[INFO] finished tweaking crates.io crate muter 0.7.0
[INFO] tweaked toml for crates.io crate muter 0.7.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate muter 0.7.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6733e8bef00f7f6d1429872d7e175f39d3ac08f86d6a0a5098facacbc4f63465
[INFO] running `Command { std: "docker" "start" "-a" "6733e8bef00f7f6d1429872d7e175f39d3ac08f86d6a0a5098facacbc4f63465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6733e8bef00f7f6d1429872d7e175f39d3ac08f86d6a0a5098facacbc4f63465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6733e8bef00f7f6d1429872d7e175f39d3ac08f86d6a0a5098facacbc4f63465", kill_on_drop: false }`
[INFO] [stdout] 6733e8bef00f7f6d1429872d7e175f39d3ac08f86d6a0a5098facacbc4f63465
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3ba5430a73ab6ab60c7c692b81258fad4e7e12fa8257af66e2e0dd8c4df761b
[INFO] running `Command { std: "docker" "start" "-a" "b3ba5430a73ab6ab60c7c692b81258fad4e7e12fa8257af66e2e0dd8c4df761b", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling muter v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking multi_reader v0.1.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking pretty_assertions v0.5.1
[INFO] [stderr]    Compiling gettext-sys v0.19.9
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking blake2 v0.8.1
[INFO] [stderr]     Checking locale_config v0.3.0
[INFO] [stderr]     Checking locale_config v0.2.3
[INFO] [stderr]     Checking gettext-rs v0.4.4
[INFO] [stderr]     Checking gettext-rs v0.5.0
[INFO] [stderr]     Checking tr v0.1.6
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:281:53
[INFO] [stdout]     |
[INFO] [stdout] 281 |             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 281 -             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 281 +             iter.map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:285:53
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 285 +                 .map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/lib/codec/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:281:53
[INFO] [stdout]     |
[INFO] [stdout] 281 |             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 281 -             iter.map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 281 +             iter.map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/lib/codec/helpers/codecs.rs:285:53
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |                                                     ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -                 .map(|(k, &v)| i64::from(self.table[(v as usize)]) << ((is - 1 - k) * bits))
[INFO] [stdout] 285 +                 .map(|(k, &v)| i64::from(self.table[v as usize]) << ((is - 1 - k) * bits))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/lib/codec/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.63s
[INFO] running `Command { std: "docker" "inspect" "b3ba5430a73ab6ab60c7c692b81258fad4e7e12fa8257af66e2e0dd8c4df761b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3ba5430a73ab6ab60c7c692b81258fad4e7e12fa8257af66e2e0dd8c4df761b", kill_on_drop: false }`
[INFO] [stdout] b3ba5430a73ab6ab60c7c692b81258fad4e7e12fa8257af66e2e0dd8c4df761b