[INFO] cloning repository https://github.com/JayThomason/os-tutorial-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JayThomason/os-tutorial-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJayThomason%2Fos-tutorial-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJayThomason%2Fos-tutorial-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c56691f6b91eaf666a5c3dbe748fc40ac145bde1
[INFO] checking JayThomason/os-tutorial-rs against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJayThomason%2Fos-tutorial-rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JayThomason/os-tutorial-rs on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JayThomason/os-tutorial-rs
[INFO] finished tweaking git repo https://github.com/JayThomason/os-tutorial-rs
[INFO] tweaked toml for git repo https://github.com/JayThomason/os-tutorial-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/JayThomason/os-tutorial-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 391cc08e5e0df4d2bf3afc295b41450d672f22072a8d0d4a94d0531340d539f6
[INFO] running `Command { std: "docker" "start" "-a" "391cc08e5e0df4d2bf3afc295b41450d672f22072a8d0d4a94d0531340d539f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "391cc08e5e0df4d2bf3afc295b41450d672f22072a8d0d4a94d0531340d539f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "391cc08e5e0df4d2bf3afc295b41450d672f22072a8d0d4a94d0531340d539f6", kill_on_drop: false }`
[INFO] [stdout] 391cc08e5e0df4d2bf3afc295b41450d672f22072a8d0d4a94d0531340d539f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cd4a5b08a384f600c79262943aeb6e3449a7cadaa5db0c4e52c15047a674a23
[INFO] running `Command { std: "docker" "start" "-a" "6cd4a5b08a384f600c79262943aeb6e3449a7cadaa5db0c4e52c15047a674a23", kill_on_drop: false }`
[INFO] [stderr]    Compiling os-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> build.rs:11:43
[INFO] [stdout]    |
[INFO] [stdout] 11 |     assert!(nasm_output.status.success(), format!("\n\n{}\n", std::str::from_utf8(&nasm_output.stderr).unwrap()));
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 11 -     assert!(nasm_output.status.success(), format!("\n\n{}\n", std::str::from_utf8(&nasm_output.stderr).unwrap()));
[INFO] [stdout] 11 +     assert!(nasm_output.status.success(), "\n\n{}\n", std::str::from_utf8(&nasm_output.stderr).unwrap());
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "6cd4a5b08a384f600c79262943aeb6e3449a7cadaa5db0c4e52c15047a674a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd4a5b08a384f600c79262943aeb6e3449a7cadaa5db0c4e52c15047a674a23", kill_on_drop: false }`
[INFO] [stdout] 6cd4a5b08a384f600c79262943aeb6e3449a7cadaa5db0c4e52c15047a674a23