[INFO] fetching crate port_check 0.1.5...
[INFO] checking port_check-0.1.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate port_check 0.1.5 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate port_check 0.1.5 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 port_check 0.1.5
[INFO] finished tweaking crates.io crate port_check 0.1.5
[INFO] tweaked toml for crates.io crate port_check 0.1.5 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] 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] c984656f17772ebe6f54f2c84d67720aad194c12624d7c6d3c719069ea8320cc
[INFO] running `Command { std: "docker" "start" "-a" "c984656f17772ebe6f54f2c84d67720aad194c12624d7c6d3c719069ea8320cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c984656f17772ebe6f54f2c84d67720aad194c12624d7c6d3c719069ea8320cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c984656f17772ebe6f54f2c84d67720aad194c12624d7c6d3c719069ea8320cc", kill_on_drop: false }`
[INFO] [stdout] c984656f17772ebe6f54f2c84d67720aad194c12624d7c6d3c719069ea8320cc
[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] c649d650b7b917ff3bff7e82fac7cd6b7bc6596b84ce28efcb7d595fd9c60944
[INFO] running `Command { std: "docker" "start" "-a" "c649d650b7b917ff3bff7e82fac7cd6b7bc6596b84ce28efcb7d595fd9c60944", kill_on_drop: false }`
[INFO] [stderr]     Checking port_check v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ipv4Addr` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:20
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `Ipv4Addr` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SocketAddrV4` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:30
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `SocketAddrV4` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TcpListener` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:44
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `TcpListener` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:55:23
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `Duration` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 55 |     use std::{thread, time::Duration};
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "c649d650b7b917ff3bff7e82fac7cd6b7bc6596b84ce28efcb7d595fd9c60944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c649d650b7b917ff3bff7e82fac7cd6b7bc6596b84ce28efcb7d595fd9c60944", kill_on_drop: false }`
[INFO] [stdout] c649d650b7b917ff3bff7e82fac7cd6b7bc6596b84ce28efcb7d595fd9c60944
[INFO] checking port_check-0.1.5 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate port_check 0.1.5 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate port_check 0.1.5 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 port_check 0.1.5
[INFO] finished tweaking crates.io crate port_check 0.1.5
[INFO] tweaked toml for crates.io crate port_check 0.1.5 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-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] c566467d79f135195f26f2565ddc8db4509cd69474d39475c93d99c11435e121
[INFO] running `Command { std: "docker" "start" "-a" "c566467d79f135195f26f2565ddc8db4509cd69474d39475c93d99c11435e121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c566467d79f135195f26f2565ddc8db4509cd69474d39475c93d99c11435e121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c566467d79f135195f26f2565ddc8db4509cd69474d39475c93d99c11435e121", kill_on_drop: false }`
[INFO] [stdout] c566467d79f135195f26f2565ddc8db4509cd69474d39475c93d99c11435e121
[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] 47cde791d321b16450c24bd48079b17646f489cca428a4301dab438ddcb455ef
[INFO] running `Command { std: "docker" "start" "-a" "47cde791d321b16450c24bd48079b17646f489cca428a4301dab438ddcb455ef", kill_on_drop: false }`
[INFO] [stderr]     Checking port_check v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ipv4Addr` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:20
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `Ipv4Addr` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SocketAddrV4` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:30
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `SocketAddrV4` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TcpListener` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:53:44
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `TcpListener` is already imported here
[INFO] [stdout] 53 |     use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:55:23
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use super::*;
[INFO] [stdout]    |         -------- the item `Duration` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 55 |     use std::{thread, time::Duration};
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "47cde791d321b16450c24bd48079b17646f489cca428a4301dab438ddcb455ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47cde791d321b16450c24bd48079b17646f489cca428a4301dab438ddcb455ef", kill_on_drop: false }`
[INFO] [stdout] 47cde791d321b16450c24bd48079b17646f489cca428a4301dab438ddcb455ef