[INFO] cloning repository https://github.com/yuki-uchida/rust-stun-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuki-uchida/rust-stun-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuki-uchida%2Frust-stun-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuki-uchida%2Frust-stun-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f74bd39743e8ff122213cad237c134707f5a921b
[INFO] checking yuki-uchida/rust-stun-practice against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuki-uchida%2Frust-stun-practice" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuki-uchida/rust-stun-practice 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/yuki-uchida/rust-stun-practice
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/yuki-uchida/rust-stun-practice
[INFO] tweaked toml for git repo https://github.com/yuki-uchida/rust-stun-practice written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yuki-uchida/rust-stun-practice 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]     Blocking waiting for file lock on package cache
[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] ec1aa92caf36ad82c1fb2630831cab2ae36505daaa288276d147770da6475236
[INFO] running `Command { std: "docker" "start" "-a" "ec1aa92caf36ad82c1fb2630831cab2ae36505daaa288276d147770da6475236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec1aa92caf36ad82c1fb2630831cab2ae36505daaa288276d147770da6475236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec1aa92caf36ad82c1fb2630831cab2ae36505daaa288276d147770da6475236", kill_on_drop: false }`
[INFO] [stdout] ec1aa92caf36ad82c1fb2630831cab2ae36505daaa288276d147770da6475236
[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] b50f480ba5d0baeb27f533117b954b98a9373104d3eaf8a049d1df41efc2a4e5
[INFO] running `Command { std: "docker" "start" "-a" "b50f480ba5d0baeb27f533117b954b98a9373104d3eaf8a049d1df41efc2a4e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking tinyvec v1.2.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling tokio v1.8.1
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking stun v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ipv4Addr`
[INFO] [stdout]  --> src/message.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::net::{IpAddr, Ipv4Addr, SocketAddr};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ipv4Addr`
[INFO] [stdout]  --> src/message.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::net::{IpAddr, Ipv4Addr, SocketAddr};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ipv6`
[INFO] [stdout]   --> src/message.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             IpAddr::V6(ipv6) => { /* handle IPv6 */ }
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_ipv6`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ipv6`
[INFO] [stdout]   --> src/message.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             IpAddr::V6(ipv6) => { /* handle IPv6 */ }
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_ipv6`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.16s
[INFO] running `Command { std: "docker" "inspect" "b50f480ba5d0baeb27f533117b954b98a9373104d3eaf8a049d1df41efc2a4e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b50f480ba5d0baeb27f533117b954b98a9373104d3eaf8a049d1df41efc2a4e5", kill_on_drop: false }`
[INFO] [stdout] b50f480ba5d0baeb27f533117b954b98a9373104d3eaf8a049d1df41efc2a4e5
[INFO] checking yuki-uchida/rust-stun-practice against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuki-uchida%2Frust-stun-practice" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuki-uchida/rust-stun-practice 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/yuki-uchida/rust-stun-practice
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/yuki-uchida/rust-stun-practice
[INFO] tweaked toml for git repo https://github.com/yuki-uchida/rust-stun-practice written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yuki-uchida/rust-stun-practice 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 7c6fd143818bb199fc9f21aca6f1921049be12321850d0c13cc0e8760d85ddeb
[INFO] running `Command { std: "docker" "start" "-a" "7c6fd143818bb199fc9f21aca6f1921049be12321850d0c13cc0e8760d85ddeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c6fd143818bb199fc9f21aca6f1921049be12321850d0c13cc0e8760d85ddeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6fd143818bb199fc9f21aca6f1921049be12321850d0c13cc0e8760d85ddeb", kill_on_drop: false }`
[INFO] [stdout] 7c6fd143818bb199fc9f21aca6f1921049be12321850d0c13cc0e8760d85ddeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dd361b03aeccc279388a2313388e7483bb8d7169da33db33674d243726e876d1
[INFO] running `Command { std: "docker" "start" "-a" "dd361b03aeccc279388a2313388e7483bb8d7169da33db33674d243726e876d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking tinyvec v1.2.0
[INFO] [stderr]    Compiling tokio v1.8.1
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking stun v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ipv4Addr`
[INFO] [stdout]  --> src/message.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::net::{IpAddr, Ipv4Addr, SocketAddr};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ipv4Addr`
[INFO] [stdout]  --> src/message.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::net::{IpAddr, Ipv4Addr, SocketAddr};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ipv6`
[INFO] [stdout]   --> src/message.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             IpAddr::V6(ipv6) => { /* handle IPv6 */ }
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_ipv6`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ipv6`
[INFO] [stdout]   --> src/message.rs:64:24
[INFO] [stdout]    |
[INFO] [stdout] 64 |             IpAddr::V6(ipv6) => { /* handle IPv6 */ }
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_ipv6`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.61s
[INFO] running `Command { std: "docker" "inspect" "dd361b03aeccc279388a2313388e7483bb8d7169da33db33674d243726e876d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd361b03aeccc279388a2313388e7483bb8d7169da33db33674d243726e876d1", kill_on_drop: false }`
[INFO] [stdout] dd361b03aeccc279388a2313388e7483bb8d7169da33db33674d243726e876d1