[INFO] fetching crate bootloader-x86_64-bios-stage-2 0.11.12...
[INFO] testing bootloader-x86_64-bios-stage-2-0.11.12 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate bootloader-x86_64-bios-stage-2 0.11.12 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate bootloader-x86_64-bios-stage-2 0.11.12
[INFO] finished tweaking crates.io crate bootloader-x86_64-bios-stage-2 0.11.12
[INFO] tweaked toml for crates.io crate bootloader-x86_64-bios-stage-2 0.11.12 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate bootloader-x86_64-bios-stage-2 0.11.12 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate bootloader-x86_64-bios-stage-2 0.11.12 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bootloader-x86_64-bios-common v0.11.12
[INFO] [stderr]   Downloaded mbr-nostd v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8081d2d8b3370fc808c73558a884659da4d7e01025c0cab6c8508d906174f6ed
[INFO] running `Command { std: "docker" "start" "-a" "8081d2d8b3370fc808c73558a884659da4d7e01025c0cab6c8508d906174f6ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8081d2d8b3370fc808c73558a884659da4d7e01025c0cab6c8508d906174f6ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8081d2d8b3370fc808c73558a884659da4d7e01025c0cab6c8508d906174f6ed", kill_on_drop: false }`
[INFO] [stdout] 8081d2d8b3370fc808c73558a884659da4d7e01025c0cab6c8508d906174f6ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d352505b4c5fc06060a2656e675821923c45438c413dadf37ddb3f33a2fe3e16
[INFO] running `Command { std: "docker" "start" "-a" "d352505b4c5fc06060a2656e675821923c45438c413dadf37ddb3f33a2fe3e16", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling bootloader-x86_64-bios-stage-2 v0.11.12 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bootloader-x86_64-bios-common v0.11.12
[INFO] [stderr]    Compiling mbr-nostd v0.1.0
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bootloader-x86_64-bios-stage-2` (bin "bootloader-x86_64-bios-stage-2") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d352505b4c5fc06060a2656e675821923c45438c413dadf37ddb3f33a2fe3e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d352505b4c5fc06060a2656e675821923c45438c413dadf37ddb3f33a2fe3e16", kill_on_drop: false }`
[INFO] [stdout] d352505b4c5fc06060a2656e675821923c45438c413dadf37ddb3f33a2fe3e16