[INFO] fetching crate multiline 0.1.1...
[INFO] checking multiline-0.1.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate multiline 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate multiline 0.1.1 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 multiline 0.1.1
[INFO] finished tweaking crates.io crate multiline 0.1.1
[INFO] tweaked toml for crates.io crate multiline 0.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate multiline 0.1.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ucd-util v0.1.3
[INFO] [stderr]   Downloaded quote v0.6.12
[INFO] [stderr]   Downloaded termion v1.5.3
[INFO] [stderr]   Downloaded rand_core v0.4.0
[INFO] [stderr]   Downloaded autocfg v0.1.4
[INFO] [stderr]   Downloaded error-chain v0.12.1
[INFO] [stderr]   Downloaded chrono v0.4.7
[INFO] [stderr]   Downloaded cc v1.0.37
[INFO] [stderr]   Downloaded regex-syntax v0.6.8
[INFO] [stderr]   Downloaded backtrace-sys v0.1.30
[INFO] [stderr]   Downloaded libc v0.2.58
[INFO] [stderr]   Downloaded backtrace v0.3.32
[INFO] [stderr]   Downloaded pulldown-cmark v0.2.0
[INFO] [stderr]   Downloaded serde v1.0.94
[INFO] [stderr]   Downloaded crossbeam-channel v0.3.8
[INFO] [stderr]   Downloaded aho-corasick v0.7.4
[INFO] [stderr]   Downloaded regex v1.1.9
[INFO] [stderr]   Downloaded itertools v0.8.0
[INFO] [stderr]   Downloaded serde_derive v1.0.94
[INFO] [stderr]   Downloaded crossbeam-utils v0.6.5
[INFO] [stderr]   Downloaded smallvec v0.6.10
[INFO] [stderr]   Downloaded either v1.5.2
[INFO] [stderr]   Downloaded log v0.4.6
[INFO] [stderr]   Downloaded bytecount v0.4.0
[INFO] [stderr]   Downloaded same-file v1.0.4
[INFO] [stderr]   Downloaded walkdir v2.2.8
[INFO] [stderr]   Downloaded skeptic v0.13.4
[INFO] [stderr]   Downloaded problem v5.1.0
[INFO] [stderr]   Downloaded tap v0.3.1
[INFO] [stderr]   Downloaded multistream-batch v0.1.0
[INFO] [stderr]   Downloaded cotton v0.0.1
[INFO] [stderr]   Downloaded utf8-ranges v1.0.3
[INFO] [stderr]   Downloaded syn v0.15.39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 541a809fb175ad74e3dbd8ce8ed3249e8af024aa1468f2d190d464c9fbe71276
[INFO] running `Command { std: "docker" "start" "-a" "541a809fb175ad74e3dbd8ce8ed3249e8af024aa1468f2d190d464c9fbe71276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "541a809fb175ad74e3dbd8ce8ed3249e8af024aa1468f2d190d464c9fbe71276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "541a809fb175ad74e3dbd8ce8ed3249e8af024aa1468f2d190d464c9fbe71276", kill_on_drop: false }`
[INFO] [stdout] 541a809fb175ad74e3dbd8ce8ed3249e8af024aa1468f2d190d464c9fbe71276
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bd42752c7ff65dedf27e88780846e12f6e57b519701c177725b6d7845822f44a
[INFO] running `Command { std: "docker" "start" "-a" "bd42752c7ff65dedf27e88780846e12f6e57b519701c177725b6d7845822f44a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling walkdir v2.2.8
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking boolinator v2.4.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking tap v0.3.1
[INFO] [stderr]     Checking multistream-batch v0.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling problem v5.1.0
[INFO] [stderr]     Checking cotton v0.0.1
[INFO] [stderr]     Checking multiline v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cotton::prelude::*;
[INFO] [stdout]   |     ------------------ the item `BufReader` is already imported here
[INFO] [stdout] 2 | use multistream_batch::channel::multi_buf_batch::{MultiBufBatchChannel, Command};
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufWriter` is imported redundantly
[INFO] [stdout]  --> src/main.rs:3:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cotton::prelude::*;
[INFO] [stdout]   |     ------------------ the item `BufWriter` is already imported here
[INFO] [stdout] 2 | use multistream_batch::channel::multi_buf_batch::{MultiBufBatchChannel, Command};
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cotton::prelude::*;
[INFO] [stdout]   |     ------------------ the item `BufReader` is already imported here
[INFO] [stdout] 2 | use multistream_batch::channel::multi_buf_batch::{MultiBufBatchChannel, Command};
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufWriter` is imported redundantly
[INFO] [stdout]  --> src/main.rs:3:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cotton::prelude::*;
[INFO] [stdout]   |     ------------------ the item `BufWriter` is already imported here
[INFO] [stdout] 2 | use multistream_batch::channel::multi_buf_batch::{MultiBufBatchChannel, Command};
[INFO] [stdout] 3 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |                          ^^^^^^^^^
[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` profile [unoptimized + debuginfo] target(s) in 11.48s
[INFO] running `Command { std: "docker" "inspect" "bd42752c7ff65dedf27e88780846e12f6e57b519701c177725b6d7845822f44a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd42752c7ff65dedf27e88780846e12f6e57b519701c177725b6d7845822f44a", kill_on_drop: false }`
[INFO] [stdout] bd42752c7ff65dedf27e88780846e12f6e57b519701c177725b6d7845822f44a