[INFO] fetching crate topgrade 13.0.0...
[INFO] checking topgrade-13.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate topgrade 13.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate topgrade 13.0.0 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 topgrade 13.0.0
[INFO] finished tweaking crates.io crate topgrade 13.0.0
[INFO] tweaked toml for crates.io crate topgrade 13.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate topgrade 13.0.0 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 which v4.1.0
[INFO] [stderr]   Downloaded rustls-pemfile v1.0.2
[INFO] [stderr]   Downloaded merge_derive v0.1.0
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[INFO] [stderr]   Downloaded rustversion v1.0.12
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[INFO] [stderr]   Downloaded clap_complete v3.1.4
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[INFO] [stderr]   Downloaded tokio v1.18.6
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.39.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.39.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.39.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.39.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.39.0
[INFO] [stderr]   Downloaded parselnk v0.1.1
[INFO] [stderr]   Downloaded dlv-list v0.5.0
[INFO] [stderr]   Downloaded ordered-multimap v0.6.0
[INFO] [stderr]   Downloaded rust-ini v0.19.0
[INFO] [stderr]   Downloaded rustls-webpki v0.100.2
[INFO] [stderr]   Downloaded merge v0.1.0
[INFO] [stderr]   Downloaded xattr v0.2.3
[INFO] [stderr]   Downloaded const-random-macro v0.1.15
[INFO] [stderr]   Downloaded hyper-rustls v0.24.0
[INFO] [stderr]   Downloaded windows v0.39.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e210d27bd3b69bc0a136020ad238ffb921358198e7649dc08136fd35547a4f00
[INFO] running `Command { std: "docker" "start" "-a" "e210d27bd3b69bc0a136020ad238ffb921358198e7649dc08136fd35547a4f00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e210d27bd3b69bc0a136020ad238ffb921358198e7649dc08136fd35547a4f00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e210d27bd3b69bc0a136020ad238ffb921358198e7649dc08136fd35547a4f00", kill_on_drop: false }`
[INFO] [stdout] e210d27bd3b69bc0a136020ad238ffb921358198e7649dc08136fd35547a4f00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 5b8b5af5a6304d668e08b709a1f2e366c33da064586b0a065fb4830a23b16f91
[INFO] running `Command { std: "docker" "start" "-a" "5b8b5af5a6304d668e08b709a1f2e366c33da064586b0a065fb4830a23b16f91", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
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[INFO] [stderr]    Compiling libc v0.2.147
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[INFO] [stderr]     Checking pin-project-lite v0.2.9
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[INFO] [stderr]    Compiling serde_derive v1.0.164
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[INFO] [stderr]    Compiling enumflags2_derive v0.7.7
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[INFO] [stderr]     Checking ordered-multimap v0.6.0
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[INFO] [stderr]    Compiling thiserror-impl v1.0.40
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[INFO] [stderr]    Compiling topgrade v13.0.0 (/opt/rustwide/workdir)
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[INFO] [stderr]     Checking home v0.5.5
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[INFO] [stderr]     Checking tokio v1.18.6
[INFO] [stderr]     Checking etcetera v0.8.0
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[INFO] [stderr]     Checking merge v0.1.0
[INFO] [stderr]     Checking clap_complete v3.1.4
[INFO] [stderr]     Checking nix v0.24.3
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[INFO] [stderr]     Checking shellexpand v2.1.2
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking regex-split v0.1.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking shell-words v1.1.0
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking enumflags2 v0.7.7
[INFO] [stderr]     Checking toml v0.5.11
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[INFO] [stderr]     Checking zbus v3.13.1
[INFO] [stderr]     Checking notify-rust v4.8.0
[INFO] [stdout] warning: the item `home` is imported redundantly
[INFO] [stdout]   --> src/steps/os/unix.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use home;
[INFO] [stdout]    |     ^^^^ the item `home` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `home` is imported redundantly
[INFO] [stdout]   --> src/steps/os/unix.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use home;
[INFO] [stdout]    |     ^^^^ the item `home` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/executor.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     Wet(Child),
[INFO] [stdout]     |     --- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 230 |     Wet(()),
[INFO] [stdout]     |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/executor.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     Wet(Child),
[INFO] [stdout]     |     --- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 230 |     Wet(()),
[INFO] [stdout]     |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 47s
[INFO] running `Command { std: "docker" "inspect" "5b8b5af5a6304d668e08b709a1f2e366c33da064586b0a065fb4830a23b16f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b8b5af5a6304d668e08b709a1f2e366c33da064586b0a065fb4830a23b16f91", kill_on_drop: false }`
[INFO] [stdout] 5b8b5af5a6304d668e08b709a1f2e366c33da064586b0a065fb4830a23b16f91