[INFO] cloning repository https://github.com/0xReself/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/0xReself/rust_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xReself%2Frust_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xReself%2Frust_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2655b1c57317e9e99ffcd8fbabd854b2ee70fdfd
[INFO] testing 0xReself/rust_os against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xReself%2Frust_os" "/workspace/builds/worker-67/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-67/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0xReself/rust_os on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-67/source/.cargo/config
[INFO] started tweaking git repo https://github.com/0xReself/rust_os
[INFO] finished tweaking git repo https://github.com/0xReself/rust_os
[INFO] tweaked toml for git repo https://github.com/0xReself/rust_os written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] crate git repo https://github.com/0xReself/rust_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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 v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bfa0f74839e6e975e0e05d968bc20013015ab8e3724dcd49d2dcc7392e6d95d6
[INFO] running `Command { std: "docker" "start" "-a" "bfa0f74839e6e975e0e05d968bc20013015ab8e3724dcd49d2dcc7392e6d95d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfa0f74839e6e975e0e05d968bc20013015ab8e3724dcd49d2dcc7392e6d95d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfa0f74839e6e975e0e05d968bc20013015ab8e3724dcd49d2dcc7392e6d95d6", kill_on_drop: false }`
[INFO] [stdout] bfa0f74839e6e975e0e05d968bc20013015ab8e3724dcd49d2dcc7392e6d95d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c9c34257db56bce2dfaf2729ba880973c08a4f6dc8220230773d1ab969e88b5
[INFO] running `Command { std: "docker" "start" "-a" "0c9c34257db56bce2dfaf2729ba880973c08a4f6dc8220230773d1ab969e88b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.8.1
[INFO] [stderr]    Compiling volatile v0.2.6
[INFO] [stderr]    Compiling os-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.9.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.54.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libvolatile-691a8a7c41f01af0.rlib" "/opt/rustwide/rustup-home/toolchains/1.54.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-8063eea38dcc5e62.rlib" "/opt/rustwide/rustup-home/toolchains/1.54.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-5b228734afae15ee.rlib" "/opt/rustwide/rustup-home/toolchains/1.54.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-d6c7a399d95d173f.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1.54.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/os_rust-eb81a47ce031b6c0.os_rust.b6xrlc7o-cgu.2.rcgu.o: in function `_start':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:22: 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] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os-rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0c9c34257db56bce2dfaf2729ba880973c08a4f6dc8220230773d1ab969e88b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c9c34257db56bce2dfaf2729ba880973c08a4f6dc8220230773d1ab969e88b5", kill_on_drop: false }`
[INFO] [stdout] 0c9c34257db56bce2dfaf2729ba880973c08a4f6dc8220230773d1ab969e88b5