[INFO] fetching crate csv-sniffer 0.3.1...
[INFO] checking csv-sniffer-0.3.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate csv-sniffer 0.3.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate csv-sniffer 0.3.1 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 csv-sniffer 0.3.1
[INFO] finished tweaking crates.io crate csv-sniffer 0.3.1
[INFO] tweaked toml for crates.io crate csv-sniffer 0.3.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate csv-sniffer 0.3.1 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]     Blocking waiting for file lock on package cache
[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] db7520ff50ddcadff41f421719fc221cd7894b9eaf4f843d7dcaf63d5ba69b63
[INFO] running `Command { std: "docker" "start" "-a" "db7520ff50ddcadff41f421719fc221cd7894b9eaf4f843d7dcaf63d5ba69b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db7520ff50ddcadff41f421719fc221cd7894b9eaf4f843d7dcaf63d5ba69b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db7520ff50ddcadff41f421719fc221cd7894b9eaf4f843d7dcaf63d5ba69b63", kill_on_drop: false }`
[INFO] [stdout] db7520ff50ddcadff41f421719fc221cd7894b9eaf4f843d7dcaf63d5ba69b63
[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] f6172d10e7caa5afce1f8389f47c60590ea0eec5ffc3fd521b31eb44ff21cfe3
[INFO] running `Command { std: "docker" "start" "-a" "f6172d10e7caa5afce1f8389f47c60590ea0eec5ffc3fd521b31eb44ff21cfe3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking csv-sniffer v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/error.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use csv;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/sniffer.rs:6:11
[INFO] [stdout]    |
[INFO] [stdout] 6  | use csv::{self, Reader, StringRecord};
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `memchr` is imported redundantly
[INFO] [stdout]   --> src/snip.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use memchr;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | extern crate memchr;
[INFO] [stdout]    | -------------------- the item `memchr` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/error.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use csv;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/sniffer.rs:6:11
[INFO] [stdout]    |
[INFO] [stdout] 6  | use csv::{self, Reader, StringRecord};
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `memchr` is imported redundantly
[INFO] [stdout]   --> src/snip.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use memchr;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | extern crate memchr;
[INFO] [stdout]    | -------------------- the item `memchr` is already imported here
[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 5.93s
[INFO] running `Command { std: "docker" "inspect" "f6172d10e7caa5afce1f8389f47c60590ea0eec5ffc3fd521b31eb44ff21cfe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6172d10e7caa5afce1f8389f47c60590ea0eec5ffc3fd521b31eb44ff21cfe3", kill_on_drop: false }`
[INFO] [stdout] f6172d10e7caa5afce1f8389f47c60590ea0eec5ffc3fd521b31eb44ff21cfe3
[INFO] checking csv-sniffer-0.3.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate csv-sniffer 0.3.1 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate csv-sniffer 0.3.1 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 csv-sniffer 0.3.1
[INFO] finished tweaking crates.io crate csv-sniffer 0.3.1
[INFO] tweaked toml for crates.io crate csv-sniffer 0.3.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate csv-sniffer 0.3.1 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] 6586f56b3f6092a5652b224382ee1fb5ea5b04894844ffe6b5c96d7e63545f6f
[INFO] running `Command { std: "docker" "start" "-a" "6586f56b3f6092a5652b224382ee1fb5ea5b04894844ffe6b5c96d7e63545f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6586f56b3f6092a5652b224382ee1fb5ea5b04894844ffe6b5c96d7e63545f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6586f56b3f6092a5652b224382ee1fb5ea5b04894844ffe6b5c96d7e63545f6f", kill_on_drop: false }`
[INFO] [stdout] 6586f56b3f6092a5652b224382ee1fb5ea5b04894844ffe6b5c96d7e63545f6f
[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] eaa34c0545b5b53c4cd1df12a44ea9c63b8a9be17502e7d81cb5965b31c150e9
[INFO] running `Command { std: "docker" "start" "-a" "eaa34c0545b5b53c4cd1df12a44ea9c63b8a9be17502e7d81cb5965b31c150e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking csv-sniffer v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/error.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use csv;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/sniffer.rs:6:11
[INFO] [stdout]    |
[INFO] [stdout] 6  | use csv::{self, Reader, StringRecord};
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `memchr` is imported redundantly
[INFO] [stdout]   --> src/snip.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use memchr;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | extern crate memchr;
[INFO] [stdout]    | -------------------- the item `memchr` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/error.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use csv;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `csv` is imported redundantly
[INFO] [stdout]   --> src/sniffer.rs:6:11
[INFO] [stdout]    |
[INFO] [stdout] 6  | use csv::{self, Reader, StringRecord};
[INFO] [stdout]    |           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:86:1
[INFO] [stdout]    |
[INFO] [stdout] 86 | extern crate csv;
[INFO] [stdout]    | ----------------- the item `csv` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `memchr` is imported redundantly
[INFO] [stdout]   --> src/snip.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use memchr;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | extern crate memchr;
[INFO] [stdout]    | -------------------- the item `memchr` is already imported here
[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 6.10s
[INFO] running `Command { std: "docker" "inspect" "eaa34c0545b5b53c4cd1df12a44ea9c63b8a9be17502e7d81cb5965b31c150e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaa34c0545b5b53c4cd1df12a44ea9c63b8a9be17502e7d81cb5965b31c150e9", kill_on_drop: false }`
[INFO] [stdout] eaa34c0545b5b53c4cd1df12a44ea9c63b8a9be17502e7d81cb5965b31c150e9