[INFO] cloning repository https://github.com/duksosleepy/os-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/duksosleepy/os-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduksosleepy%2Fos-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduksosleepy%2Fos-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbc4a1be0b20244838d1531b16c0793433e24298
[INFO] checking duksosleepy/os-rust against try#6757d700f93f6d16c8b39cf79e96b019bd570e7d for pr-155299
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduksosleepy%2Fos-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/duksosleepy/os-rust
[INFO] finished tweaking git repo https://github.com/duksosleepy/os-rust
[INFO] tweaked toml for git repo https://github.com/duksosleepy/os-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/duksosleepy/os-rust on toolchain 6757d700f93f6d16c8b39cf79e96b019bd570e7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/duksosleepy/os-rust 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" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking duksosleepy/os-rust against try#6757d700f93f6d16c8b39cf79e96b019bd570e7d for pr-155299
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fduksosleepy%2Fos-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/duksosleepy/os-rust
[INFO] finished tweaking git repo https://github.com/duksosleepy/os-rust
[INFO] tweaked toml for git repo https://github.com/duksosleepy/os-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/duksosleepy/os-rust on toolchain 6757d700f93f6d16c8b39cf79e96b019bd570e7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/duksosleepy/os-rust 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" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bootloader v0.9.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbfb2961c728dddaa77e77082f387fbd37cde89432d1d2e9b097f77dbd5627dd
[INFO] running `Command { std: "docker" "start" "-a" "bbfb2961c728dddaa77e77082f387fbd37cde89432d1d2e9b097f77dbd5627dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbfb2961c728dddaa77e77082f387fbd37cde89432d1d2e9b097f77dbd5627dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfb2961c728dddaa77e77082f387fbd37cde89432d1d2e9b097f77dbd5627dd", kill_on_drop: false }`
[INFO] [stdout] bbfb2961c728dddaa77e77082f387fbd37cde89432d1d2e9b097f77dbd5627dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b35544387a341385db56372e54eee7f3f990454f34f935770b4ccc95e1000ce
[INFO] running `Command { std: "docker" "start" "-a" "8b35544387a341385db56372e54eee7f3f990454f34f935770b4ccc95e1000ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.29
[INFO] [stderr]     Checking os-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout] 11 | |     loop {}
[INFO] [stdout] 12 | | }
[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/6757d700f93f6d16c8b39cf79e96b019bd570e7d/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-b9f47ac455b40996.rmeta
[INFO] [stdout]    = note: second definition in the local crate (`os_rust`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ColorCode` is never constructed
[INFO] [stdout]   --> src/vga_buffer.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct ColorCode(u8);
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/vga_buffer.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl ColorCode {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 29 |     fn new(foreground: Color, background: Color) -> ColorCode {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ScreenChar` is never constructed
[INFO] [stdout]   --> src/vga_buffer.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct ScreenChar {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BUFFER_HEIGHT` is never used
[INFO] [stdout]   --> src/vga_buffer.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | const BUFFER_HEIGHT: usize = 25;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BUFFER_WIDTH` is never used
[INFO] [stdout]   --> src/vga_buffer.rs:42:7
[INFO] [stdout]    |
[INFO] [stdout] 42 | const BUFFER_WIDTH: usize = 80;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Buffer` is never constructed
[INFO] [stdout]   --> src/vga_buffer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Buffer {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Writer` is never constructed
[INFO] [stdout]   --> src/vga_buffer.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct Writer {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `write_byte`, `write_string`, and `new_line` are never used
[INFO] [stdout]   --> src/vga_buffer.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl Writer {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 56 |     pub fn write_byte(&mut self, byte: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn write_string(&mut self, s: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     fn new_line(&mut self) { /* TODO */
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_something` is never used
[INFO] [stdout]   --> src/vga_buffer.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn print_something() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os-rust` (bin "os-rust" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8b35544387a341385db56372e54eee7f3f990454f34f935770b4ccc95e1000ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b35544387a341385db56372e54eee7f3f990454f34f935770b4ccc95e1000ce", kill_on_drop: false }`
[INFO] [stdout] 8b35544387a341385db56372e54eee7f3f990454f34f935770b4ccc95e1000ce