[INFO] cloning repository https://github.com/johnmarco123/rust_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnmarco123/rust_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnmarco123%2Frust_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnmarco123%2Frust_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fed01ea75fd3d7ce7fdba7404d505b0bc53c4655
[INFO] checking johnmarco123/rust_server against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnmarco123%2Frust_server" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnmarco123/rust_server 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/johnmarco123/rust_server
[INFO] finished tweaking git repo https://github.com/johnmarco123/rust_server
[INFO] tweaked toml for git repo https://github.com/johnmarco123/rust_server written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johnmarco123/rust_server 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]  Downloading crates ...
[INFO] [stderr]   Downloaded simd-adler32 v0.3.5
[INFO] [stderr]   Downloaded exr v1.6.4
[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] 6bae59dc9746bffe5fbcd276be896d7b824b08facd868b3f2e7c9254f52a27fb
[INFO] running `Command { std: "docker" "start" "-a" "6bae59dc9746bffe5fbcd276be896d7b824b08facd868b3f2e7c9254f52a27fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bae59dc9746bffe5fbcd276be896d7b824b08facd868b3f2e7c9254f52a27fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bae59dc9746bffe5fbcd276be896d7b824b08facd868b3f2e7c9254f52a27fb", kill_on_drop: false }`
[INFO] [stdout] 6bae59dc9746bffe5fbcd276be896d7b824b08facd868b3f2e7c9254f52a27fb
[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] 93547b38255e1c8b169a896734bb7bde2affddafd689997597c90c290ac66f0a
[INFO] running `Command { std: "docker" "start" "-a" "93547b38255e1c8b169a896734bb7bde2affddafd689997597c90c290ac66f0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]     Checking simd-adler32 v0.3.5
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking weezl v0.1.7
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking fdeflate v0.3.0
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking half v2.2.1
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]     Checking fs_extra v1.3.0
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking gif v0.12.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking png v0.17.9
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.3.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.0
[INFO] [stderr]     Checking tiff v0.8.1
[INFO] [stderr]     Checking pin-project v1.1.0
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.6.4
[INFO] [stderr]     Checking image v0.24.6
[INFO] [stderr]     Checking rust_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         handle_connection(stream); 
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = handle_connection(stream); 
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         handle_connection(stream); 
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = handle_connection(stream); 
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.60s
[INFO] running `Command { std: "docker" "inspect" "93547b38255e1c8b169a896734bb7bde2affddafd689997597c90c290ac66f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93547b38255e1c8b169a896734bb7bde2affddafd689997597c90c290ac66f0a", kill_on_drop: false }`
[INFO] [stdout] 93547b38255e1c8b169a896734bb7bde2affddafd689997597c90c290ac66f0a
[INFO] checking johnmarco123/rust_server against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnmarco123%2Frust_server" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnmarco123/rust_server 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/johnmarco123/rust_server
[INFO] finished tweaking git repo https://github.com/johnmarco123/rust_server
[INFO] tweaked toml for git repo https://github.com/johnmarco123/rust_server written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/johnmarco123/rust_server 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] [stderr]     Blocking waiting for file lock on package cache
[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] bc33e9c7727555262faca7c23236a2a040358d8558e1a229b75c2842cb663505
[INFO] running `Command { std: "docker" "start" "-a" "bc33e9c7727555262faca7c23236a2a040358d8558e1a229b75c2842cb663505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc33e9c7727555262faca7c23236a2a040358d8558e1a229b75c2842cb663505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc33e9c7727555262faca7c23236a2a040358d8558e1a229b75c2842cb663505", kill_on_drop: false }`
[INFO] [stdout] bc33e9c7727555262faca7c23236a2a040358d8558e1a229b75c2842cb663505
[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] 05323ba1347646b887ffe979fe3fd4bf2290a4a7f666d67516a6388d69342a0d
[INFO] running `Command { std: "docker" "start" "-a" "05323ba1347646b887ffe979fe3fd4bf2290a4a7f666d67516a6388d69342a0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]     Checking simd-adler32 v0.3.5
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking weezl v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking fdeflate v0.3.0
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking half v2.2.1
[INFO] [stderr]     Checking lebe v0.5.2
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking fs_extra v1.3.0
[INFO] [stderr]     Checking gif v0.12.0
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking png v0.17.9
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.3.0
[INFO] [stderr]     Checking tiff v0.8.1
[INFO] [stderr]    Compiling pin-project-internal v1.1.0
[INFO] [stderr]     Checking pin-project v1.1.0
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.6.4
[INFO] [stderr]     Checking image v0.24.6
[INFO] [stderr]     Checking rust_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         handle_connection(stream); 
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = handle_connection(stream); 
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         handle_connection(stream); 
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let _ = handle_connection(stream); 
[INFO] [stdout]    |         +++++++
[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 17.75s
[INFO] running `Command { std: "docker" "inspect" "05323ba1347646b887ffe979fe3fd4bf2290a4a7f666d67516a6388d69342a0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05323ba1347646b887ffe979fe3fd4bf2290a4a7f666d67516a6388d69342a0d", kill_on_drop: false }`
[INFO] [stdout] 05323ba1347646b887ffe979fe3fd4bf2290a4a7f666d67516a6388d69342a0d