[INFO] cloning repository https://github.com/kouichi310/rust-mikan-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kouichi310/rust-mikan-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkouichi310%2Frust-mikan-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkouichi310%2Frust-mikan-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c31730696326d586607462b42c218725ca0ad70a
[INFO] testing kouichi310/rust-mikan-os against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkouichi310%2Frust-mikan-os" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kouichi310/rust-mikan-os
[INFO] finished tweaking git repo https://github.com/kouichi310/rust-mikan-os
[INFO] tweaked toml for git repo https://github.com/kouichi310/rust-mikan-os written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kouichi310/rust-mikan-os on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kouichi310/rust-mikan-os 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac341c8e181454423f74fecb0aa7432f522397877bf533b7a1bb5a3cb9117ad7
[INFO] running `Command { std: "docker" "start" "-a" "ac341c8e181454423f74fecb0aa7432f522397877bf533b7a1bb5a3cb9117ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac341c8e181454423f74fecb0aa7432f522397877bf533b7a1bb5a3cb9117ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac341c8e181454423f74fecb0aa7432f522397877bf533b7a1bb5a3cb9117ad7", kill_on_drop: false }`
[INFO] [stdout] ac341c8e181454423f74fecb0aa7432f522397877bf533b7a1bb5a3cb9117ad7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8870afc0a8260706b32fbabff0705453334215ed5bd5b38990637bda84cddd5
[INFO] running `Command { std: "docker" "start" "-a" "d8870afc0a8260706b32fbabff0705453334215ed5bd5b38990637bda84cddd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling iana-time-zone v0.1.63
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling utf16_literal v0.2.1
[INFO] [stderr]    Compiling rust_mikan_os_kernel v0.1.0 (/opt/rustwide/workdir/kernel)
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustcfEvykC/symbols.o" "<1 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libcore-*,libcompiler_builtins-*}.rlib" "-L" "/opt/rustwide/target/debug/deps/rustcfEvykC/raw-dylibs" "-Wl,-Bdynamic" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/rust_mikan_os_kernel-18de8d1beb22087b" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: undefined symbol: main
[INFO] [stdout]           >>> referenced by /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __libc_start_main
[INFO] [stdout]           >>> referenced by /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o:(_start)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: rust_eh_personality
[INFO] [stdout]           >>> referenced by core.6771d259883166e6-cgu.0
[INFO] [stdout]           >>>               core-bba39127454076fb.core.6771d259883166e6-cgu.0.rcgu.o:(DW.ref.rust_eh_personality) in archive /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-bba39127454076fb.rlib
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_mikan_os_kernel` (bin "rust_mikan_os_kernel") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d8870afc0a8260706b32fbabff0705453334215ed5bd5b38990637bda84cddd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8870afc0a8260706b32fbabff0705453334215ed5bd5b38990637bda84cddd5", kill_on_drop: false }`
[INFO] [stdout] d8870afc0a8260706b32fbabff0705453334215ed5bd5b38990637bda84cddd5
