[INFO] cloning repository https://github.com/DanglingPointer/mtorrent
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DanglingPointer/mtorrent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanglingPointer%2Fmtorrent", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanglingPointer%2Fmtorrent'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 234c934f3b3350f4070de4fe64bb438df5a0c000
[INFO] checking DanglingPointer/mtorrent against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanglingPointer%2Fmtorrent" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DanglingPointer/mtorrent 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] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/DanglingPointer/mtorrent
[INFO] finished tweaking git repo https://github.com/DanglingPointer/mtorrent
[INFO] tweaked toml for git repo https://github.com/DanglingPointer/mtorrent written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DanglingPointer/mtorrent 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 tempfile v3.4.0
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[INFO] [stderr]   Downloaded serde_json v1.0.93
[INFO] [stderr]   Downloaded reqwest v0.12.1
[INFO] [stderr]   Downloaded time v0.3.20
[INFO] [stderr]   Downloaded async-compression v0.4.6
[INFO] [stderr]   Downloaded serde v1.0.152
[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] c392b65f3b20209162b1e9b5a142455407fc546ed0f47d0f2ab8ea3a57077c37
[INFO] running `Command { std: "docker" "start" "-a" "c392b65f3b20209162b1e9b5a142455407fc546ed0f47d0f2ab8ea3a57077c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c392b65f3b20209162b1e9b5a142455407fc546ed0f47d0f2ab8ea3a57077c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c392b65f3b20209162b1e9b5a142455407fc546ed0f47d0f2ab8ea3a57077c37", kill_on_drop: false }`
[INFO] [stdout] c392b65f3b20209162b1e9b5a142455407fc546ed0f47d0f2ab8ea3a57077c37
[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] 19d41857ec9b9167695b46d13a5c9c9c281b4e698e90e75f37f4651778900972
[INFO] running `Command { std: "docker" "start" "-a" "19d41857ec9b9167695b46d13a5c9c9c281b4e698e90e75f37f4651778900972", kill_on_drop: false }`
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[INFO] [stdout] warning: the item `SocketAddr` is imported redundantly
[INFO] [stdout]    --> src/pwp/handshake.rs:166:30
[INFO] [stdout]     |
[INFO] [stdout] 164 |     use super::*;
[INFO] [stdout]     |         -------- the item `SocketAddr` is already imported here
[INFO] [stdout] 165 |     use futures::join;
[INFO] [stdout] 166 |     use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stdout]     |                              ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SocketAddr` is imported redundantly
[INFO] [stdout]   --> src/pwp/requests.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 41 |     use super::*;
[INFO] [stdout]    |         -------- the item `SocketAddr` is already imported here
[INFO] [stdout] 42 |     use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stdout]    |                              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fs` is imported redundantly
[INFO] [stdout]    --> src/utils/config.rs:137:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use super::*;
[INFO] [stdout]     |         -------- the item `fs` is already imported here
[INFO] [stdout] 137 |     use std::fs;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rc` is imported redundantly
[INFO] [stdout]    --> src/utils/fifo.rs:175:15
[INFO] [stdout]     |
[INFO] [stdout] 172 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rc` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 175 |     use std::{rc::Rc, sync::Arc};
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/tracker/udp.rs:409:27
[INFO] [stdout]     |
[INFO] [stdout] 409 | pub struct ScrapeResponse(Vec<ScrapeResponseEntry>);
[INFO] [stdout]     |            -------------- ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ScrapeResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 409 | pub struct ScrapeResponse(());
[INFO] [stdout]     |                           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/tracker/udp.rs:409:27
[INFO] [stdout]     |
[INFO] [stdout] 409 | pub struct ScrapeResponse(Vec<ScrapeResponseEntry>);
[INFO] [stdout]     |            -------------- ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ScrapeResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 409 | pub struct ScrapeResponse(());
[INFO] [stdout]     |                           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 1m 18s
[INFO] running `Command { std: "docker" "inspect" "19d41857ec9b9167695b46d13a5c9c9c281b4e698e90e75f37f4651778900972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19d41857ec9b9167695b46d13a5c9c9c281b4e698e90e75f37f4651778900972", kill_on_drop: false }`
[INFO] [stdout] 19d41857ec9b9167695b46d13a5c9c9c281b4e698e90e75f37f4651778900972