[INFO] cloning repository https://github.com/Nanoteck137/nano_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nanoteck137/nano_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanoteck137%2Fnano_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanoteck137%2Fnano_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7ce03afa1954cb99e1176b6521bead35877aa3a2
[INFO] checking Nanoteck137/nano_os against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanoteck137%2Fnano_os" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nanoteck137/nano_os on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nanoteck137/nano_os
[INFO] finished tweaking git repo https://github.com/Nanoteck137/nano_os
[INFO] tweaked toml for git repo https://github.com/Nanoteck137/nano_os written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/Nanoteck137/nano_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36d4550737c68f3e1e61496f701c314f85b561cc3de66706eb8aecd3bedbe4bd
[INFO] running `Command { std: "docker" "start" "-a" "36d4550737c68f3e1e61496f701c314f85b561cc3de66706eb8aecd3bedbe4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36d4550737c68f3e1e61496f701c314f85b561cc3de66706eb8aecd3bedbe4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36d4550737c68f3e1e61496f701c314f85b561cc3de66706eb8aecd3bedbe4bd", kill_on_drop: false }`
[INFO] [stdout] 36d4550737c68f3e1e61496f701c314f85b561cc3de66706eb8aecd3bedbe4bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3edd2ca92cc3082aa2825f197f3f8b3398d222fe6ea9527207ea18f6956ba0ce
[INFO] running `Command { std: "docker" "start" "-a" "3edd2ca92cc3082aa2825f197f3f8b3398d222fe6ea9527207ea18f6956ba0ce", kill_on_drop: false }`
[INFO] [stderr]     Checking nano_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | /     Command::new("nasm")
[INFO] [stdout] 38 | |         .current_dir(&build_path)
[INFO] [stdout] 39 | |         .args(&[
[INFO] [stdout] 40 | |             "-g",
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |             "-o", "boot.o"])
[INFO] [stdout] 44 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | /     Command::new("nasm")
[INFO] [stdout] 47 | |         .current_dir(&build_path)
[INFO] [stdout] 48 | |         .args(&[
[INFO] [stdout] 49 | |             "-g",
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |             "-o", "boot64.o"])
[INFO] [stdout] 53 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | /     Command::new("cargo")
[INFO] [stdout] 64 | |         .current_dir(&kernel_path)
[INFO] [stdout] 65 | |         .args(&[
[INFO] [stdout] 66 | |             "build",
[INFO] [stdout] 67 | |             "--target-dir", kernel_build_path.to_str().unwrap()])
[INFO] [stdout] 68 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 | /     Command::new("ld")
[INFO] [stdout] 87 | |         .current_dir(&build_path)
[INFO] [stdout] 88 | |         .args(&[
[INFO] [stdout] 89 | |             "-n", 
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |             "-o", "kernel.bin"])
[INFO] [stdout] 95 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]    --> src/main.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | /     Command::new("grub-mkrescue")
[INFO] [stdout] 102 | |         .current_dir(&build_path)
[INFO] [stdout] 103 | |         .args(&[
[INFO] [stdout] 104 | |             "-o", "nanoos.iso",
[INFO] [stdout] 105 | |             "isofiles"])
[INFO] [stdout] 106 | |         .status()?.success();
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | /     Command::new("nasm")
[INFO] [stdout] 38 | |         .current_dir(&build_path)
[INFO] [stdout] 39 | |         .args(&[
[INFO] [stdout] 40 | |             "-g",
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |             "-o", "boot.o"])
[INFO] [stdout] 44 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | /     Command::new("nasm")
[INFO] [stdout] 47 | |         .current_dir(&build_path)
[INFO] [stdout] 48 | |         .args(&[
[INFO] [stdout] 49 | |             "-g",
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |             "-o", "boot64.o"])
[INFO] [stdout] 53 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | /     Command::new("cargo")
[INFO] [stdout] 64 | |         .current_dir(&kernel_path)
[INFO] [stdout] 65 | |         .args(&[
[INFO] [stdout] 66 | |             "build",
[INFO] [stdout] 67 | |             "--target-dir", kernel_build_path.to_str().unwrap()])
[INFO] [stdout] 68 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]   --> src/main.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 | /     Command::new("ld")
[INFO] [stdout] 87 | |         .current_dir(&build_path)
[INFO] [stdout] 88 | |         .args(&[
[INFO] [stdout] 89 | |             "-n", 
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |             "-o", "kernel.bin"])
[INFO] [stdout] 95 | |         .status()?.success();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ExitStatus::success` that must be used
[INFO] [stdout]    --> src/main.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | /     Command::new("grub-mkrescue")
[INFO] [stdout] 102 | |         .current_dir(&build_path)
[INFO] [stdout] 103 | |         .args(&[
[INFO] [stdout] 104 | |             "-o", "nanoos.iso",
[INFO] [stdout] 105 | |             "isofiles"])
[INFO] [stdout] 106 | |         .status()?.success();
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "3edd2ca92cc3082aa2825f197f3f8b3398d222fe6ea9527207ea18f6956ba0ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3edd2ca92cc3082aa2825f197f3f8b3398d222fe6ea9527207ea18f6956ba0ce", kill_on_drop: false }`
[INFO] [stdout] 3edd2ca92cc3082aa2825f197f3f8b3398d222fe6ea9527207ea18f6956ba0ce