[INFO] cloning repository https://github.com/mrsweaters/nutbutter-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mrsweaters/nutbutter-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrsweaters%2Fnutbutter-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrsweaters%2Fnutbutter-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d78c1c4a1180610af9ca2ec10d9a8d300caa792a
[INFO] checking mrsweaters/nutbutter-os against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrsweaters%2Fnutbutter-os" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mrsweaters/nutbutter-os on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mrsweaters/nutbutter-os
[INFO] finished tweaking git repo https://github.com/mrsweaters/nutbutter-os
[INFO] tweaked toml for git repo https://github.com/mrsweaters/nutbutter-os written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/mrsweaters/nutbutter-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d5fbe224c38c3df45e0df74611a9779d4986624d62941676cf2c21d5cfba4afa
[INFO] running `Command { std: "docker" "start" "-a" "d5fbe224c38c3df45e0df74611a9779d4986624d62941676cf2c21d5cfba4afa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5fbe224c38c3df45e0df74611a9779d4986624d62941676cf2c21d5cfba4afa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5fbe224c38c3df45e0df74611a9779d4986624d62941676cf2c21d5cfba4afa", kill_on_drop: false }`
[INFO] [stdout] d5fbe224c38c3df45e0df74611a9779d4986624d62941676cf2c21d5cfba4afa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 19ec6732ca8f0df9a4efd7827bdc9e77320778d46e2ed47080497f89e665942a
[INFO] running `Command { std: "docker" "start" "-a" "19ec6732ca8f0df9a4efd7827bdc9e77320778d46e2ed47080497f89e665942a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking os_bootinfo v0.2.1
[INFO] [stderr]     Checking spin v0.4.9
[INFO] [stderr]     Checking volatile v0.2.4
[INFO] [stderr]     Checking bootloader_precompiled v0.2.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking nb_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/vga_buffer.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/a609fb45efad59dfd459c76e50899be9f0583b5a/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-25c6acf8063a3802.rlib
[INFO] [stdout]    = note: second definition in the local crate (`nb_os`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/vga_buffer.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nb_os`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "19ec6732ca8f0df9a4efd7827bdc9e77320778d46e2ed47080497f89e665942a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19ec6732ca8f0df9a4efd7827bdc9e77320778d46e2ed47080497f89e665942a", kill_on_drop: false }`
[INFO] [stdout] 19ec6732ca8f0df9a4efd7827bdc9e77320778d46e2ed47080497f89e665942a