[INFO] cloning repository https://github.com/Bush-Man/study-operating-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bush-Man/study-operating-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBush-Man%2Fstudy-operating-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBush-Man%2Fstudy-operating-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fa5431f08afc785b46b5e07fb7d73996d9e019e
[INFO] checking Bush-Man/study-operating-system against master#292be5c7c05138d753bbd4b30db7a3f1a5c914f7 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBush-Man%2Fstudy-operating-system" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Bush-Man/study-operating-system
[INFO] finished tweaking git repo https://github.com/Bush-Man/study-operating-system
[INFO] tweaked toml for git repo https://github.com/Bush-Man/study-operating-system written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Bush-Man/study-operating-system on toolchain 292be5c7c05138d753bbd4b30db7a3f1a5c914f7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Bush-Man/study-operating-system 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" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file `/workspace/builds/worker-7-tc1/source/src/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `lib` target `studyos`
[INFO] [stderr]   * `bin` target `studyos`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 964237eee0f882fe062d36e5b4eaeb39f9f3fb729507b6593369a5bfbccea5be
[INFO] running `Command { std: "docker" "start" "-a" "964237eee0f882fe062d36e5b4eaeb39f9f3fb729507b6593369a5bfbccea5be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "964237eee0f882fe062d36e5b4eaeb39f9f3fb729507b6593369a5bfbccea5be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "964237eee0f882fe062d36e5b4eaeb39f9f3fb729507b6593369a5bfbccea5be", kill_on_drop: false }`
[INFO] [stdout] 964237eee0f882fe062d36e5b4eaeb39f9f3fb729507b6593369a5bfbccea5be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+292be5c7c05138d753bbd4b30db7a3f1a5c914f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f99783fa000494cef675a24960c4e993d122df050baa9fa96aff257a9998ebf
[INFO] running `Command { std: "docker" "start" "-a" "8f99783fa000494cef675a24960c4e993d122df050baa9fa96aff257a9998ebf", kill_on_drop: false }`
[INFO] [stderr] warning: file `/opt/rustwide/workdir/src/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `lib` target `studyos`
[INFO] [stderr]   * `bin` target `studyos`
[INFO] [stderr]     Checking studyos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::write`
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::{fmt::write, panic::PanicInfo};
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/main.rs:8:35
[INFO] [stdout]   |
[INFO] [stdout] 8 | use memory::multiboot_structure::{self, MultibootInfoStructure};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::write`
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::{fmt::write, panic::PanicInfo};
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/main.rs:8:35
[INFO] [stdout]   |
[INFO] [stdout] 8 | use memory::multiboot_structure::{self, MultibootInfoStructure};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / fn panic_handler(_info:&PanicInfo)->!{
[INFO] [stdout] 19 | |     loop{}
[INFO] [stdout] 20 | | }
[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/292be5c7c05138d753bbd4b30db7a3f1a5c914f7/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-d73d50f7d7b085f5.rlib
[INFO] [stdout]    = note: second definition in the local crate (`studyos`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::write`
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::{fmt::write, panic::PanicInfo};
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/main.rs:8:35
[INFO] [stdout]   |
[INFO] [stdout] 8 | use memory::multiboot_structure::{self, MultibootInfoStructure};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / fn panic_handler(_info:&PanicInfo)->!{
[INFO] [stdout] 19 | |     loop{}
[INFO] [stdout] 20 | | }
[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/292be5c7c05138d753bbd4b30db7a3f1a5c914f7/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-d73d50f7d7b085f5.rlib
[INFO] [stdout]    = note: second definition in the local crate (`studyos`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] warning: static `WORLD` is never used
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | static WORLD:&str = "Wörld!";
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/vga/writter.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum VgaColor {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 11 |     Black = 0,
[INFO] [stdout] 12 |     Blue = 1,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     Green = 2,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 14 |     Cyan = 3,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     Red = 4,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     Magenta = 5,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     Brown = 6,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     LightGrey = 7,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 19 |     DarkGrey = 8,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 20 |     LightBlue = 9,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     LightGreen = 10,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 22 |     LightCyan = 11,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 23 |     LightRed = 12,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 24 |     LightMagenta = 13,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 25 |     Yellow = 14,  
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `studyos` (lib test) due to 1 previous error; 2 warnings emitted
[INFO] [stdout] warning: struct `VgaCharacter` is never constructed
[INFO] [stdout]   --> src/vga/writter.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct VgaCharacter{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: method `clear_row` is never used
[INFO] [stdout]    --> src/vga/writter.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  45 | impl VgaWriter{
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn clear_row(&mut self,row:usize){
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GlobalWriter` is never constructed
[INFO] [stdout]  --> src/vga/global_writer.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct GlobalWriter {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `write` are never used
[INFO] [stdout]   --> src/vga/global_writer.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl GlobalWriter{
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 10 |    const fn new()->Self{
[INFO] [stdout]    |             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn write(&self, args:fmt::Arguments){
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `GLOBAL_WRITER` is never used
[INFO] [stdout]   --> src/vga/global_writer.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub static  GLOBAL_WRITER: GlobalWriter = GlobalWriter::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `studyos` (bin "studyos" test) due to 1 previous error; 2 warnings emitted
[INFO] [stdout] warning: unused import: `fmt::write`
[INFO] [stdout]  --> src/main.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::{fmt::write, panic::PanicInfo};
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/main.rs:8:35
[INFO] [stdout]   |
[INFO] [stdout] 8 | use memory::multiboot_structure::{self, MultibootInfoStructure};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `WORLD` is never used
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | static WORLD:&str = "Wörld!";
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/vga/writter.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum VgaColor {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 11 |     Black = 0,
[INFO] [stdout] 12 |     Blue = 1,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     Green = 2,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 14 |     Cyan = 3,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     Red = 4,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     Magenta = 5,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     Brown = 6,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     LightGrey = 7,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 19 |     DarkGrey = 8,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 20 |     LightBlue = 9,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     LightGreen = 10,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 22 |     LightCyan = 11,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 23 |     LightRed = 12,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 24 |     LightMagenta = 13,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 25 |     Yellow = 14,  
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VgaCharacter` is never constructed
[INFO] [stdout]   --> src/vga/writter.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct VgaCharacter{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear_row` is never used
[INFO] [stdout]    --> src/vga/writter.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  45 | impl VgaWriter{
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn clear_row(&mut self,row:usize){
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GlobalWriter` is never constructed
[INFO] [stdout]  --> src/vga/global_writer.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct GlobalWriter {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `write` are never used
[INFO] [stdout]   --> src/vga/global_writer.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl GlobalWriter{
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 10 |    const fn new()->Self{
[INFO] [stdout]    |             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn write(&self, args:fmt::Arguments){
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `GLOBAL_WRITER` is never used
[INFO] [stdout]   --> src/vga/global_writer.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub static  GLOBAL_WRITER: GlobalWriter = GlobalWriter::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8f99783fa000494cef675a24960c4e993d122df050baa9fa96aff257a9998ebf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f99783fa000494cef675a24960c4e993d122df050baa9fa96aff257a9998ebf", kill_on_drop: false }`
[INFO] [stdout] 8f99783fa000494cef675a24960c4e993d122df050baa9fa96aff257a9998ebf
