[INFO] cloning repository https://github.com/red1bluelost/TUNNEL-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/red1bluelost/TUNNEL-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred1bluelost%2FTUNNEL-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred1bluelost%2FTUNNEL-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 96b3e41bbbf6ee057a93def3747e63f2bc1da476
[INFO] checking red1bluelost/TUNNEL-test against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred1bluelost%2FTUNNEL-test" "/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/red1bluelost/TUNNEL-test 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/red1bluelost/TUNNEL-test
[INFO] finished tweaking git repo https://github.com/red1bluelost/TUNNEL-test
[INFO] tweaked toml for git repo https://github.com/red1bluelost/TUNNEL-test written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/red1bluelost/TUNNEL-test 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] 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] 26c015d3cc241f3fd0fbb2b332d3b2ab70cc877412c7b4066353a343eb334199
[INFO] running `Command { std: "docker" "start" "-a" "26c015d3cc241f3fd0fbb2b332d3b2ab70cc877412c7b4066353a343eb334199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26c015d3cc241f3fd0fbb2b332d3b2ab70cc877412c7b4066353a343eb334199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26c015d3cc241f3fd0fbb2b332d3b2ab70cc877412c7b4066353a343eb334199", kill_on_drop: false }`
[INFO] [stdout] 26c015d3cc241f3fd0fbb2b332d3b2ab70cc877412c7b4066353a343eb334199
[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] 0755b895991b60f1d866a3beef02c1a2173585c35344cd1a074d8e41b226c934
[INFO] running `Command { std: "docker" "start" "-a" "0755b895991b60f1d866a3beef02c1a2173585c35344cd1a074d8e41b226c934", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking libudev v0.3.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serialport v4.2.0
[INFO] [stderr]     Checking tunnel-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serialport::SerialPort`
[INFO] [stdout]  --> src/bin/receive.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport::SerialPort;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/bin/receive.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let count = buf.len();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serialport::SerialPort`
[INFO] [stdout]  --> src/bin/receive.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport::SerialPort;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/bin/receive.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let count = buf.len();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.88s
[INFO] running `Command { std: "docker" "inspect" "0755b895991b60f1d866a3beef02c1a2173585c35344cd1a074d8e41b226c934", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0755b895991b60f1d866a3beef02c1a2173585c35344cd1a074d8e41b226c934", kill_on_drop: false }`
[INFO] [stdout] 0755b895991b60f1d866a3beef02c1a2173585c35344cd1a074d8e41b226c934
[INFO] checking red1bluelost/TUNNEL-test against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred1bluelost%2FTUNNEL-test" "/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/red1bluelost/TUNNEL-test 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/red1bluelost/TUNNEL-test
[INFO] finished tweaking git repo https://github.com/red1bluelost/TUNNEL-test
[INFO] tweaked toml for git repo https://github.com/red1bluelost/TUNNEL-test written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/red1bluelost/TUNNEL-test 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] 4a98553e752e7d27096e03b1f66ea74378f7e9ff0eb168de35d956a69186b55c
[INFO] running `Command { std: "docker" "start" "-a" "4a98553e752e7d27096e03b1f66ea74378f7e9ff0eb168de35d956a69186b55c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a98553e752e7d27096e03b1f66ea74378f7e9ff0eb168de35d956a69186b55c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a98553e752e7d27096e03b1f66ea74378f7e9ff0eb168de35d956a69186b55c", kill_on_drop: false }`
[INFO] [stdout] 4a98553e752e7d27096e03b1f66ea74378f7e9ff0eb168de35d956a69186b55c
[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] e9e86d45a42bfc8961ce3cc79e65172bf11430f3ea1a74ffecfc366397201886
[INFO] running `Command { std: "docker" "start" "-a" "e9e86d45a42bfc8961ce3cc79e65172bf11430f3ea1a74ffecfc366397201886", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking libudev v0.3.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serialport v4.2.0
[INFO] [stderr]     Checking tunnel-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serialport::SerialPort`
[INFO] [stdout]  --> src/bin/receive.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport::SerialPort;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/bin/receive.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let count = buf.len();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[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 import: `serialport::SerialPort`
[INFO] [stdout]  --> src/bin/receive.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport::SerialPort;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/bin/receive.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let count = buf.len();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[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 5.71s
[INFO] running `Command { std: "docker" "inspect" "e9e86d45a42bfc8961ce3cc79e65172bf11430f3ea1a74ffecfc366397201886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9e86d45a42bfc8961ce3cc79e65172bf11430f3ea1a74ffecfc366397201886", kill_on_drop: false }`
[INFO] [stdout] e9e86d45a42bfc8961ce3cc79e65172bf11430f3ea1a74ffecfc366397201886