[INFO] cloning repository https://github.com/vic-rattlehead/Rust-Os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vic-rattlehead/Rust-Os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvic-rattlehead%2FRust-Os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvic-rattlehead%2FRust-Os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b053af73f0177afa43867415251891e09b9967a4
[INFO] testing vic-rattlehead/Rust-Os against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvic-rattlehead%2FRust-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/vic-rattlehead/Rust-Os on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vic-rattlehead/Rust-Os
[INFO] finished tweaking git repo https://github.com/vic-rattlehead/Rust-Os
[INFO] tweaked toml for git repo https://github.com/vic-rattlehead/Rust-Os written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/vic-rattlehead/Rust-Os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] warning: unused manifest key: unstable
[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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf9c58c65b75d548001e4b11ca03cef2f01f4869dfb6777fe0be92c866ef60b9
[INFO] running `Command { std: "docker" "start" "-a" "bf9c58c65b75d548001e4b11ca03cef2f01f4869dfb6777fe0be92c866ef60b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf9c58c65b75d548001e4b11ca03cef2f01f4869dfb6777fe0be92c866ef60b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf9c58c65b75d548001e4b11ca03cef2f01f4869dfb6777fe0be92c866ef60b9", kill_on_drop: false }`
[INFO] [stdout] bf9c58c65b75d548001e4b11ca03cef2f01f4869dfb6777fe0be92c866ef60b9
[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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92ec03423f9cf8a1f5b118a15ca9ca103dea7acf98b329bd3b6bf5745f541bb5
[INFO] running `Command { std: "docker" "start" "-a" "92ec03423f9cf8a1f5b118a15ca9ca103dea7acf98b329bd3b6bf5745f541bb5", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] warning: unused manifest key: unstable
[INFO] [stderr]    Compiling bootloader v0.9.18
[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 os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Off`
[INFO] [stdout]   --> src/vga_buffer.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Off = 0,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/vga_buffer.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[warn(dead_code)]
[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/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.9.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.59.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblazy_static-c21e6b87e625d70f.rlib" "/opt/rustwide/target/debug/deps/libspin-9bf53fea0d1b3454.rlib" "/opt/rustwide/target/debug/deps/libvolatile-0a4c039306fa23d1.rlib" "/opt/rustwide/rustup-home/toolchains/1.59.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-bad7ed93fdd31371.rlib" "/opt/rustwide/rustup-home/toolchains/1.59.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-98b4d121af2b7335.rlib" "/opt/rustwide/rustup-home/toolchains/1.59.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-1d9f7e5920635d15.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1.59.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/os-7a0a12d9e236a9d3.os.da5fbe7f-cgu.7.rcgu.o: in function `_start':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:15: 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; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "92ec03423f9cf8a1f5b118a15ca9ca103dea7acf98b329bd3b6bf5745f541bb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92ec03423f9cf8a1f5b118a15ca9ca103dea7acf98b329bd3b6bf5745f541bb5", kill_on_drop: false }`
[INFO] [stdout] 92ec03423f9cf8a1f5b118a15ca9ca103dea7acf98b329bd3b6bf5745f541bb5