[INFO] cloning repository https://github.com/anosatsuk124/viterum-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anosatsuk124/viterum-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanosatsuk124%2Fviterum-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanosatsuk124%2Fviterum-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 735a4b534df48ffde05a643c49845cc6cceb5ba5
[INFO] testing anosatsuk124/viterum-os against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanosatsuk124%2Fviterum-os" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anosatsuk124/viterum-os on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-17/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-17/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/anosatsuk124/viterum-os
[INFO] finished tweaking git repo https://github.com/anosatsuk124/viterum-os
[INFO] tweaked toml for git repo https://github.com/anosatsuk124/viterum-os written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/anosatsuk124/viterum-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70acfc133589e54204594b3e2f28e52c6a8864dc673e587c8a7030454b2c0537
[INFO] running `Command { std: "docker" "start" "-a" "70acfc133589e54204594b3e2f28e52c6a8864dc673e587c8a7030454b2c0537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70acfc133589e54204594b3e2f28e52c6a8864dc673e587c8a7030454b2c0537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70acfc133589e54204594b3e2f28e52c6a8864dc673e587c8a7030454b2c0537", kill_on_drop: false }`
[INFO] [stdout] 70acfc133589e54204594b3e2f28e52c6a8864dc673e587c8a7030454b2c0537
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e5d5da22616118ae9be9b3f20258c06209933478aa7132721c0b6a2b18c860f
[INFO] running `Command { std: "docker" "start" "-a" "4e5d5da22616118ae9be9b3f20258c06209933478aa7132721c0b6a2b18c860f", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.22
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling viterum-os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/vga_buffer.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt::{self, Write};
[INFO] [stdout]   |                       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `HELLO`
[INFO] [stdout]   --> src/main.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | static HELLO: &[u8] = b"Hello World!";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear_row`
[INFO] [stdout]   --> src/vga_buffer.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn clear_row(&mut self, row: usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.9.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libvolatile-1abc892ce2ef1bd0.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-0ab9723fe0ad805d.rlib" "/opt/rustwide/target/debug/deps/libspin-db4b903677ce5bb9.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-6c2c561a8181be5e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-88c4d85fe493b0a6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f5394bdb1df5df01.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/viterum_os-fccff9155b723210.viterum_os.240fa3cb-cgu.10.rcgu.o: in function `_start':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:16: multiple definition of `_start'; /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stdout]           /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
[INFO] [stdout]           (.text+0x16): undefined reference to `__libc_csu_fini'
[INFO] [stdout]           /usr/bin/ld: (.text+0x1d): undefined reference to `__libc_csu_init'
[INFO] [stdout]           /usr/bin/ld: (.text+0x24): undefined reference to `main'
[INFO] [stdout]           /usr/bin/ld: (.text+0x2a): undefined reference to `__libc_start_main'
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout]   = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
[INFO] [stdout]   = note: use the `-l` flag to specify native libraries to link
[INFO] [stdout]   = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `viterum-os` due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4e5d5da22616118ae9be9b3f20258c06209933478aa7132721c0b6a2b18c860f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e5d5da22616118ae9be9b3f20258c06209933478aa7132721c0b6a2b18c860f", kill_on_drop: false }`
[INFO] [stdout] 4e5d5da22616118ae9be9b3f20258c06209933478aa7132721c0b6a2b18c860f