[INFO] cloning repository https://github.com/takkuumi/serial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/takkuumi/serial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakkuumi%2Fserial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakkuumi%2Fserial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80f2dbd3e88f4a5a166abdca3b551d9033dfc1b3
[INFO] testing takkuumi/serial against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakkuumi%2Fserial" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/takkuumi/serial
[INFO] finished tweaking git repo https://github.com/takkuumi/serial
[INFO] tweaked toml for git repo https://github.com/takkuumi/serial written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/takkuumi/serial on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/takkuumi/serial 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libudev v0.3.0
[INFO] [stderr]   Downloaded CoreFoundation-sys v0.1.4
[INFO] [stderr]   Downloaded serialport v4.2.0
[INFO] [stderr]   Downloaded IOKit-sys v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0eb31ca82c335888b0e6251be3bae94dd1b599bc6555551d9f4b8cdb8d2001ea
[INFO] running `Command { std: "docker" "start" "-a" "0eb31ca82c335888b0e6251be3bae94dd1b599bc6555551d9f4b8cdb8d2001ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eb31ca82c335888b0e6251be3bae94dd1b599bc6555551d9f4b8cdb8d2001ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb31ca82c335888b0e6251be3bae94dd1b599bc6555551d9f4b8cdb8d2001ea", kill_on_drop: false }`
[INFO] [stdout] 0eb31ca82c335888b0e6251be3bae94dd1b599bc6555551d9f4b8cdb8d2001ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] ecd67cd8ded4fa876f07c6e02cc1e0854ac2d5f92c013f67deb300ec0412b7c8
[INFO] running `Command { std: "docker" "start" "-a" "ecd67cd8ded4fa876f07c6e02cc1e0854ac2d5f92c013f67deb300ec0412b7c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling anyhow v1.0.69
[INFO] [stderr]    Compiling encoding_rs v0.8.32
[INFO] [stderr]    Compiling nix v0.24.3
[INFO] [stderr]    Compiling serialport v4.2.0
[INFO] [stderr]    Compiling serial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:43:45
[INFO] [stdout]    |
[INFO] [stdout] 43 |             if let core::result::Result::Ok(size) = port.read(&mut buffer) {
[INFO] [stdout]    |                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.33s
[INFO] running `Command { std: "docker" "inspect" "ecd67cd8ded4fa876f07c6e02cc1e0854ac2d5f92c013f67deb300ec0412b7c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd67cd8ded4fa876f07c6e02cc1e0854ac2d5f92c013f67deb300ec0412b7c8", kill_on_drop: false }`
[INFO] [stdout] ecd67cd8ded4fa876f07c6e02cc1e0854ac2d5f92c013f67deb300ec0412b7c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b998daefdc51554255c3eafc9d09b49b6e68fd31fb4f86d5a036ea5fd5139bf9
[INFO] running `Command { std: "docker" "start" "-a" "b998daefdc51554255c3eafc9d09b49b6e68fd31fb4f86d5a036ea5fd5139bf9", kill_on_drop: false }`
[INFO] [stderr]    Compiling serial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:43:45
[INFO] [stdout]    |
[INFO] [stdout] 43 |             if let core::result::Result::Ok(size) = port.read(&mut buffer) {
[INFO] [stdout]    |                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "b998daefdc51554255c3eafc9d09b49b6e68fd31fb4f86d5a036ea5fd5139bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b998daefdc51554255c3eafc9d09b49b6e68fd31fb4f86d5a036ea5fd5139bf9", kill_on_drop: false }`
[INFO] [stdout] b998daefdc51554255c3eafc9d09b49b6e68fd31fb4f86d5a036ea5fd5139bf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 15b2ec504d5f0dede3d929a02f7f7933e32a22119a75951f3978fca27a81d32e
[INFO] running `Command { std: "docker" "start" "-a" "15b2ec504d5f0dede3d929a02f7f7933e32a22119a75951f3978fca27a81d32e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/main.rs:43:45
[INFO] [stderr]    |
[INFO] [stderr] 43 |             if let core::result::Result::Ok(size) = port.read(&mut buffer) {
[INFO] [stderr]    |                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `serial` (bin "serial" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/serial-263c5320ef11c166)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "15b2ec504d5f0dede3d929a02f7f7933e32a22119a75951f3978fca27a81d32e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15b2ec504d5f0dede3d929a02f7f7933e32a22119a75951f3978fca27a81d32e", kill_on_drop: false }`
[INFO] [stdout] 15b2ec504d5f0dede3d929a02f7f7933e32a22119a75951f3978fca27a81d32e