[INFO] fetching crate nix-doc 0.5.3...
[INFO] checking nix-doc-0.5.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate nix-doc 0.5.3 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate nix-doc 0.5.3 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 nix-doc 0.5.3
[INFO] finished tweaking crates.io crate nix-doc 0.5.3
[INFO] tweaked toml for crates.io crate nix-doc 0.5.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate nix-doc 0.5.3 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smol_str v0.1.23
[INFO] [stderr]   Downloaded cbitset v0.2.0
[INFO] [stderr]   Downloaded dissimilar v1.0.4
[INFO] [stderr]   Downloaded expect-test v1.2.2
[INFO] [stderr]   Downloaded rowan v0.9.1
[INFO] [stderr]   Downloaded rnix v0.8.1
[INFO] [stderr]   Downloaded colorful v0.2.1
[INFO] [stderr]   Downloaded text_unit v0.1.10
[INFO] [stderr]   Downloaded thin-dst v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] abcd3fd0ea74d1778c6450b215a2f475897dbdb97edb334bc63dc9f464bb7b97
[INFO] running `Command { std: "docker" "start" "-a" "abcd3fd0ea74d1778c6450b215a2f475897dbdb97edb334bc63dc9f464bb7b97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abcd3fd0ea74d1778c6450b215a2f475897dbdb97edb334bc63dc9f464bb7b97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abcd3fd0ea74d1778c6450b215a2f475897dbdb97edb334bc63dc9f464bb7b97", kill_on_drop: false }`
[INFO] [stdout] abcd3fd0ea74d1778c6450b215a2f475897dbdb97edb334bc63dc9f464bb7b97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] aa0ab8ae207e261f3684589803c6f7af01f818e290950d32e906912a7c2b9629
[INFO] running `Command { std: "docker" "start" "-a" "aa0ab8ae207e261f3684589803c6f7af01f818e290950d32e906912a7c2b9629", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking text_unit v0.1.10
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking thin-dst v1.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking colorful v0.2.1
[INFO] [stderr]     Checking dissimilar v1.0.4
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking expect-test v1.2.2
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking cbitset v0.2.0
[INFO] [stderr]     Checking smol_str v0.1.23
[INFO] [stderr]     Checking rowan v0.9.1
[INFO] [stderr]     Checking rnix v0.8.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking nix-doc v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `current_dir` is imported redundantly
[INFO] [stdout]    --> src/tags.rs:377:15
[INFO] [stdout]     |
[INFO] [stdout] 377 |         env::{current_dir, set_current_dir},
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     use super::*;
[INFO] [stdout]     |         -------- the item `current_dir` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PathBuf` is imported redundantly
[INFO] [stdout]    --> src/tags.rs:378:9
[INFO] [stdout]     |
[INFO] [stdout] 378 |         path::PathBuf,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     use super::*;
[INFO] [stdout]     |         -------- the item `PathBuf` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.17s
[INFO] running `Command { std: "docker" "inspect" "aa0ab8ae207e261f3684589803c6f7af01f818e290950d32e906912a7c2b9629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa0ab8ae207e261f3684589803c6f7af01f818e290950d32e906912a7c2b9629", kill_on_drop: false }`
[INFO] [stdout] aa0ab8ae207e261f3684589803c6f7af01f818e290950d32e906912a7c2b9629
[INFO] checking nix-doc-0.5.3 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate nix-doc 0.5.3 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate nix-doc 0.5.3 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 nix-doc 0.5.3
[INFO] finished tweaking crates.io crate nix-doc 0.5.3
[INFO] tweaked toml for crates.io crate nix-doc 0.5.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate nix-doc 0.5.3 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 151a5625900883d9e69bd0e86489f55da365f84a024b55cc74e1f4fcc872d212
[INFO] running `Command { std: "docker" "start" "-a" "151a5625900883d9e69bd0e86489f55da365f84a024b55cc74e1f4fcc872d212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "151a5625900883d9e69bd0e86489f55da365f84a024b55cc74e1f4fcc872d212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "151a5625900883d9e69bd0e86489f55da365f84a024b55cc74e1f4fcc872d212", kill_on_drop: false }`
[INFO] [stdout] 151a5625900883d9e69bd0e86489f55da365f84a024b55cc74e1f4fcc872d212
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1c977a5de377cb371478f55ef4043ad9c83b705ea3c5a4c6f69b19ad3d5542d0
[INFO] running `Command { std: "docker" "start" "-a" "1c977a5de377cb371478f55ef4043ad9c83b705ea3c5a4c6f69b19ad3d5542d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking text_unit v0.1.10
[INFO] [stderr]     Checking thin-dst v1.1.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking colorful v0.2.1
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking dissimilar v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking expect-test v1.2.2
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking cbitset v0.2.0
[INFO] [stderr]     Checking smol_str v0.1.23
[INFO] [stderr]     Checking rowan v0.9.1
[INFO] [stderr]     Checking rnix v0.8.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking nix-doc v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `current_dir` is imported redundantly
[INFO] [stdout]    --> src/tags.rs:377:15
[INFO] [stdout]     |
[INFO] [stdout] 377 |         env::{current_dir, set_current_dir},
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     use super::*;
[INFO] [stdout]     |         -------- the item `current_dir` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PathBuf` is imported redundantly
[INFO] [stdout]    --> src/tags.rs:378:9
[INFO] [stdout]     |
[INFO] [stdout] 378 |         path::PathBuf,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     use super::*;
[INFO] [stdout]     |         -------- the item `PathBuf` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.54s
[INFO] running `Command { std: "docker" "inspect" "1c977a5de377cb371478f55ef4043ad9c83b705ea3c5a4c6f69b19ad3d5542d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c977a5de377cb371478f55ef4043ad9c83b705ea3c5a4c6f69b19ad3d5542d0", kill_on_drop: false }`
[INFO] [stdout] 1c977a5de377cb371478f55ef4043ad9c83b705ea3c5a4c6f69b19ad3d5542d0