[INFO] updating cached repository https://github.com/stay-on-main/rust-os
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c9e61d13debacf429e6635b28cd9d3776fc522ff
[INFO] testing stay-on-main/rust-os against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstay-on-main%2Frust-os" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stay-on-main/rust-os on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/stay-on-main/rust-os
[INFO] finished tweaking git repo https://github.com/stay-on-main/rust-os
[INFO] tweaked toml for git repo https://github.com/stay-on-main/rust-os written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/stay-on-main/rust-os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] warning: unused manifest key: target.thumbv6m-none-eabi.rustflags
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] af396ca55a6b464b6bedbcec1516bd726221f4539910e058b09e91b2bbfdb40c
[INFO] running `"docker" "start" "-a" "af396ca55a6b464b6bedbcec1516bd726221f4539910e058b09e91b2bbfdb40c"`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] warning: unused manifest key: target.thumbv6m-none-eabi.rustflags
[INFO] [stderr]    Compiling hello_arm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: language item required, but not found: `eh_personality`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `hello_arm`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "af396ca55a6b464b6bedbcec1516bd726221f4539910e058b09e91b2bbfdb40c"`
[INFO] running `"docker" "rm" "-f" "af396ca55a6b464b6bedbcec1516bd726221f4539910e058b09e91b2bbfdb40c"`
[INFO] [stdout] af396ca55a6b464b6bedbcec1516bd726221f4539910e058b09e91b2bbfdb40c