[INFO] cloning repository https://github.com/khandelwalarvind26/p2p_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/khandelwalarvind26/p2p_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhandelwalarvind26%2Fp2p_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhandelwalarvind26%2Fp2p_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8efa376976236ce9c074e6f7fdfea570ab3f2712
[INFO] checking khandelwalarvind26/p2p_chat against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhandelwalarvind26%2Fp2p_chat" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/khandelwalarvind26/p2p_chat 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 git repo https://github.com/khandelwalarvind26/p2p_chat
[INFO] finished tweaking git repo https://github.com/khandelwalarvind26/p2p_chat
[INFO] tweaked toml for git repo https://github.com/khandelwalarvind26/p2p_chat written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/khandelwalarvind26/p2p_chat 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 neli v0.6.4
[INFO] [stderr]   Downloaded neli-proc-macros v0.1.3
[INFO] [stderr]   Downloaded local-ip-address v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 81ad25bae7f204f3ace7bcc60a08db91ca27b254be5a8c66955bfe1c844eb2ce
[INFO] running `Command { std: "docker" "start" "-a" "81ad25bae7f204f3ace7bcc60a08db91ca27b254be5a8c66955bfe1c844eb2ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81ad25bae7f204f3ace7bcc60a08db91ca27b254be5a8c66955bfe1c844eb2ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81ad25bae7f204f3ace7bcc60a08db91ca27b254be5a8c66955bfe1c844eb2ce", kill_on_drop: false }`
[INFO] [stdout] 81ad25bae7f204f3ace7bcc60a08db91ca27b254be5a8c66955bfe1c844eb2ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] cb4ced606f265f7f20dadffd6278ec5be8d0e08b62067652f09e41adcf33e830
[INFO] running `Command { std: "docker" "start" "-a" "cb4ced606f265f7f20dadffd6278ec5be8d0e08b62067652f09e41adcf33e830", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling openssl v0.10.57
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]    Compiling thiserror v1.0.47
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking ipnet v2.8.0
[INFO] [stderr]     Checking base64 v0.21.3
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]    Compiling neli-proc-macros v0.1.3
[INFO] [stderr]     Checking neli v0.6.4
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking local-ip-address v0.5.4
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.20
[INFO] [stderr]     Checking p2p_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:80
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio::{net::TcpListener, io::{BufReader, AsyncBufReadExt, AsyncWriteExt}, self};
[INFO] [stdout]   |                                                                                ^^^^ the item `tokio` 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 `tokio` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:80
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio::{net::TcpListener, io::{BufReader, AsyncBufReadExt, AsyncWriteExt}, self};
[INFO] [stdout]   |                                                                                ^^^^ the item `tokio` 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.67s
[INFO] running `Command { std: "docker" "inspect" "cb4ced606f265f7f20dadffd6278ec5be8d0e08b62067652f09e41adcf33e830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb4ced606f265f7f20dadffd6278ec5be8d0e08b62067652f09e41adcf33e830", kill_on_drop: false }`
[INFO] [stdout] cb4ced606f265f7f20dadffd6278ec5be8d0e08b62067652f09e41adcf33e830
[INFO] checking khandelwalarvind26/p2p_chat against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhandelwalarvind26%2Fp2p_chat" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/khandelwalarvind26/p2p_chat 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 git repo https://github.com/khandelwalarvind26/p2p_chat
[INFO] finished tweaking git repo https://github.com/khandelwalarvind26/p2p_chat
[INFO] tweaked toml for git repo https://github.com/khandelwalarvind26/p2p_chat written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/khandelwalarvind26/p2p_chat 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 928bf948e6acf28bf15442cad14f0f410eddcf6b10507865691e611ba6ee583f
[INFO] running `Command { std: "docker" "start" "-a" "928bf948e6acf28bf15442cad14f0f410eddcf6b10507865691e611ba6ee583f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "928bf948e6acf28bf15442cad14f0f410eddcf6b10507865691e611ba6ee583f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "928bf948e6acf28bf15442cad14f0f410eddcf6b10507865691e611ba6ee583f", kill_on_drop: false }`
[INFO] [stdout] 928bf948e6acf28bf15442cad14f0f410eddcf6b10507865691e611ba6ee583f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 78e9008782f1f214c10c3e6b2fe64d00ff62b2a57f9f433ba137bde22ea97211
[INFO] running `Command { std: "docker" "start" "-a" "78e9008782f1f214c10c3e6b2fe64d00ff62b2a57f9f433ba137bde22ea97211", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling openssl v0.10.57
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]    Compiling thiserror v1.0.47
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking ipnet v2.8.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking base64 v0.21.3
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.5.3
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]    Compiling neli-proc-macros v0.1.3
[INFO] [stderr]     Checking neli v0.6.4
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking local-ip-address v0.5.4
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.20
[INFO] [stderr]     Checking p2p_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:80
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio::{net::TcpListener, io::{BufReader, AsyncBufReadExt, AsyncWriteExt}, self};
[INFO] [stdout]   |                                                                                ^^^^ the item `tokio` 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 `tokio` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:80
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio::{net::TcpListener, io::{BufReader, AsyncBufReadExt, AsyncWriteExt}, self};
[INFO] [stdout]   |                                                                                ^^^^ the item `tokio` 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.70s
[INFO] running `Command { std: "docker" "inspect" "78e9008782f1f214c10c3e6b2fe64d00ff62b2a57f9f433ba137bde22ea97211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e9008782f1f214c10c3e6b2fe64d00ff62b2a57f9f433ba137bde22ea97211", kill_on_drop: false }`
[INFO] [stdout] 78e9008782f1f214c10c3e6b2fe64d00ff62b2a57f9f433ba137bde22ea97211