[INFO] fetching crate cmd_lib_cf 1.3.4...
[INFO] checking cmd_lib_cf-1.3.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate cmd_lib_cf 1.3.4 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate cmd_lib_cf 1.3.4 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 cmd_lib_cf 1.3.4
[INFO] finished tweaking crates.io crate cmd_lib_cf 1.3.4
[INFO] tweaked toml for crates.io crate cmd_lib_cf 1.3.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate cmd_lib_cf 1.3.4 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 faccess v0.2.3
[INFO] [stderr]   Downloaded utf8-width v0.1.5
[INFO] [stderr]   Downloaded cmd_lib_cf_macros v1.3.1
[INFO] [stderr]   Downloaded byte-unit v4.0.13
[INFO] [stderr]   Downloaded os_pipe v0.9.2
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.1
[INFO] [stderr]   Downloaded rayon-core v1.9.1
[INFO] [stderr]   Downloaded rayon v1.5.1
[INFO] [stderr]   Downloaded structopt v0.3.25
[INFO] [stderr]   Downloaded crossbeam-deque v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e6f5199ae681d5dc3cd2f88a23c6f0c2ad4081e54619184cda330217c7ded4f8
[INFO] running `Command { std: "docker" "start" "-a" "e6f5199ae681d5dc3cd2f88a23c6f0c2ad4081e54619184cda330217c7ded4f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6f5199ae681d5dc3cd2f88a23c6f0c2ad4081e54619184cda330217c7ded4f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6f5199ae681d5dc3cd2f88a23c6f0c2ad4081e54619184cda330217c7ded4f8", kill_on_drop: false }`
[INFO] [stdout] e6f5199ae681d5dc3cd2f88a23c6f0c2ad4081e54619184cda330217c7ded4f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] bd42ab5fa66897cdde8c6f533e42f13be1fc8e587fd968a405a59d2f140c7228
[INFO] running `Command { std: "docker" "start" "-a" "bd42ab5fa66897cdde8c6f533e42f13be1fc8e587fd968a405a59d2f140c7228", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking utf8-width v0.1.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking byte-unit v4.0.13
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking faccess v0.2.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling cmd_lib_cf_macros v1.3.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking cmd_lib_cf v1.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `os_pipe` is imported redundantly
[INFO] [stdout]  --> src/process.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use os_pipe::{self, PipeReader, PipeWriter};
[INFO] [stdout]   |               ^^^^ the item `os_pipe` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stdout] warning: the item `os_pipe` is imported redundantly
[INFO] [stdout]  --> src/process.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use os_pipe::{self, PipeReader, PipeWriter};
[INFO] [stdout]   |               ^^^^ the item `os_pipe` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.50s
[INFO] running `Command { std: "docker" "inspect" "bd42ab5fa66897cdde8c6f533e42f13be1fc8e587fd968a405a59d2f140c7228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd42ab5fa66897cdde8c6f533e42f13be1fc8e587fd968a405a59d2f140c7228", kill_on_drop: false }`
[INFO] [stdout] bd42ab5fa66897cdde8c6f533e42f13be1fc8e587fd968a405a59d2f140c7228
[INFO] checking cmd_lib_cf-1.3.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate cmd_lib_cf 1.3.4 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate cmd_lib_cf 1.3.4 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 cmd_lib_cf 1.3.4
[INFO] finished tweaking crates.io crate cmd_lib_cf 1.3.4
[INFO] tweaked toml for crates.io crate cmd_lib_cf 1.3.4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate cmd_lib_cf 1.3.4 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0697722e4e7c1bc87cc9acbc4b99ec0dbb6f58d52e3eed1b8bc3fed07a4cb4bc
[INFO] running `Command { std: "docker" "start" "-a" "0697722e4e7c1bc87cc9acbc4b99ec0dbb6f58d52e3eed1b8bc3fed07a4cb4bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0697722e4e7c1bc87cc9acbc4b99ec0dbb6f58d52e3eed1b8bc3fed07a4cb4bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0697722e4e7c1bc87cc9acbc4b99ec0dbb6f58d52e3eed1b8bc3fed07a4cb4bc", kill_on_drop: false }`
[INFO] [stdout] 0697722e4e7c1bc87cc9acbc4b99ec0dbb6f58d52e3eed1b8bc3fed07a4cb4bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f86cc0f1bc1abb8142795118fac6432ee7fd2b2795d1c3e51376ff2b83910524
[INFO] running `Command { std: "docker" "start" "-a" "f86cc0f1bc1abb8142795118fac6432ee7fd2b2795d1c3e51376ff2b83910524", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking utf8-width v0.1.5
[INFO] [stderr]     Checking byte-unit v4.0.13
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking os_pipe v0.9.2
[INFO] [stderr]     Checking faccess v0.2.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling cmd_lib_cf_macros v1.3.1
[INFO] [stderr]     Checking cmd_lib_cf v1.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `os_pipe` is imported redundantly
[INFO] [stdout]  --> src/process.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use os_pipe::{self, PipeReader, PipeWriter};
[INFO] [stdout]   |               ^^^^ the item `os_pipe` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stdout] warning: the item `os_pipe` is imported redundantly
[INFO] [stdout]  --> src/process.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use os_pipe::{self, PipeReader, PipeWriter};
[INFO] [stdout]   |               ^^^^ the item `os_pipe` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.08s
[INFO] running `Command { std: "docker" "inspect" "f86cc0f1bc1abb8142795118fac6432ee7fd2b2795d1c3e51376ff2b83910524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f86cc0f1bc1abb8142795118fac6432ee7fd2b2795d1c3e51376ff2b83910524", kill_on_drop: false }`
[INFO] [stdout] f86cc0f1bc1abb8142795118fac6432ee7fd2b2795d1c3e51376ff2b83910524