[INFO] cloning repository https://github.com/bowlofruit/os-lab2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bowlofruit/os-lab2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbowlofruit%2Fos-lab2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbowlofruit%2Fos-lab2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52bfa6c5cc773e23cc396a1fa6549e7a9925df22
[INFO] checking bowlofruit/os-lab2 against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbowlofruit%2Fos-lab2" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/bowlofruit/os-lab2
[INFO] finished tweaking git repo https://github.com/bowlofruit/os-lab2
[INFO] tweaked toml for git repo https://github.com/bowlofruit/os-lab2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bowlofruit/os-lab2 on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bowlofruit/os-lab2 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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42f75a50465908bc7fdefe6a04361a8ed6d126d84d276d0d9037340119bf63c4
[INFO] running `Command { std: "docker" "start" "-a" "42f75a50465908bc7fdefe6a04361a8ed6d126d84d276d0d9037340119bf63c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42f75a50465908bc7fdefe6a04361a8ed6d126d84d276d0d9037340119bf63c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42f75a50465908bc7fdefe6a04361a8ed6d126d84d276d0d9037340119bf63c4", kill_on_drop: false }`
[INFO] [stdout] 42f75a50465908bc7fdefe6a04361a8ed6d126d84d276d0d9037340119bf63c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55ee8b1fb892cb5739feea641ad8a944d0192daec5cbe78a05db4f6fefb25b1c
[INFO] running `Command { std: "docker" "start" "-a" "55ee8b1fb892cb5739feea641ad8a944d0192daec5cbe78a05db4f6fefb25b1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.23
[INFO] [stderr]     Checking unios v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Light_grey` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 |     Light_grey = 0x7,
[INFO] [stdout]     |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `LightGrey`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Dark_grey` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 169 |     Dark_grey = 0x8,
[INFO] [stdout]     |     ^^^^^^^^^ help: convert the identifier to upper camel case: `DarkGrey`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_blue` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:170:5
[INFO] [stdout]     |
[INFO] [stdout] 170 |     Light_blue = 0x9,
[INFO] [stdout]     |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `LightBlue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_green` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     Light_green = 0xa,
[INFO] [stdout]     |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LightGreen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_azure` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     Light_azure = 0xb,
[INFO] [stdout]     |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LightAzure`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_red` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 173 |     Light_red = 0xc,
[INFO] [stdout]     |     ^^^^^^^^^ help: convert the identifier to upper camel case: `LightRed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_grey` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 |     Light_grey = 0x7,
[INFO] [stdout]     |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `LightGrey`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Dark_grey` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 169 |     Dark_grey = 0x8,
[INFO] [stdout]     |     ^^^^^^^^^ help: convert the identifier to upper camel case: `DarkGrey`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_blue` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:170:5
[INFO] [stdout]     |
[INFO] [stdout] 170 |     Light_blue = 0x9,
[INFO] [stdout]     |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `LightBlue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_green` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     Light_green = 0xa,
[INFO] [stdout]     |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LightGreen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_azure` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:172:5
[INFO] [stdout]     |
[INFO] [stdout] 172 |     Light_azure = 0xb,
[INFO] [stdout]     |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LightAzure`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Light_red` should have an upper camel case name
[INFO] [stdout]    --> src/vga_buf.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 173 |     Light_red = 0xc,
[INFO] [stdout]     |     ^^^^^^^^^ help: convert the identifier to upper camel case: `LightRed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout] 13 | |     loop {}
[INFO] [stdout] 14 | | }
[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/64b185eddaa1d7ddf5e0c024be23b9cbba6c1722/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-54e42b35ab65fe3c.rlib
[INFO] [stdout]    = note: second definition in the local crate (`unios`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unios` (bin "unios" test) due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/vga_buf.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |             for i in 0..align
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/vga_buf.rs:140:25
[INFO] [stdout]     |
[INFO] [stdout] 140 |                     for i in 0..align-1
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COLOR_BLACK` is never used
[INFO] [stdout]  --> src/vga_buf.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const COLOR_BLACK: u8 = 0x0;
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Left` and `Right` are never constructed
[INFO] [stdout]   --> src/vga_buf.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Alignment {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 13 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_char` is never used
[INFO] [stdout]   --> src/vga_buf.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl Screen
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn read_char(&self, offset: u32) -> AsciiChar
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]    --> src/vga_buf.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub enum Color {
[INFO] [stdout]     |          ----- variants in this enum
[INFO] [stdout] 162 |     Blue = 0x1,
[INFO] [stdout] 163 |     Green = 0x2,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 164 |     Azure = 0x3,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 165 |     Red = 0x4,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 166 |     Purple = 0x5,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 167 |     Brown = 0x6,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 168 |     Light_grey = 0x7,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 169 |     Dark_grey = 0x8,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 170 |     Light_blue = 0x9,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 171 |     Light_green = 0xa,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 172 |     Light_azure = 0xb,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 173 |     Light_red = 0xc,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 174 |     Pink = 0xd,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 175 |     Yellow = 0xe,
[INFO] [stdout] 176 |     White = 0xf
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         write!(screen, "Number {}\n", i);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let _ = write!(screen, "Number {}\n", i);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "55ee8b1fb892cb5739feea641ad8a944d0192daec5cbe78a05db4f6fefb25b1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55ee8b1fb892cb5739feea641ad8a944d0192daec5cbe78a05db4f6fefb25b1c", kill_on_drop: false }`
[INFO] [stdout] 55ee8b1fb892cb5739feea641ad8a944d0192daec5cbe78a05db4f6fefb25b1c