[INFO] cloning repository https://github.com/ppuzicks/hello_nrf52
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ppuzicks/hello_nrf52" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fppuzicks%2Fhello_nrf52", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fppuzicks%2Fhello_nrf52'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77db1506f6d9d14292c8c8b3e9be8498266a23c0
[INFO] documenting ppuzicks/hello_nrf52 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fppuzicks%2Fhello_nrf52" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ppuzicks/hello_nrf52 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking git repo https://github.com/ppuzicks/hello_nrf52
[INFO] finished tweaking git repo https://github.com/ppuzicks/hello_nrf52
[INFO] tweaked toml for git repo https://github.com/ppuzicks/hello_nrf52 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ppuzicks/hello_nrf52 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panic-itm v0.4.2
[INFO] [stderr]   Downloaded nrf-hal-common v0.12.1
[INFO] [stderr]   Downloaded nrf52840-hal v0.12.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 022fd74e9c96c79a27040bf2cbc94b0f0e49b61844ff8b073c7733f65e6cff43
[INFO] running `Command { std: "docker" "start" "-a" "022fd74e9c96c79a27040bf2cbc94b0f0e49b61844ff8b073c7733f65e6cff43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022fd74e9c96c79a27040bf2cbc94b0f0e49b61844ff8b073c7733f65e6cff43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022fd74e9c96c79a27040bf2cbc94b0f0e49b61844ff8b073c7733f65e6cff43", kill_on_drop: false }`
[INFO] [stdout] 022fd74e9c96c79a27040bf2cbc94b0f0e49b61844ff8b073c7733f65e6cff43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6d689acede0da4fee56622a564324e716098caed2ef8c1c34e34aa033ebfd395
[INFO] running `Command { std: "docker" "start" "-a" "6d689acede0da4fee56622a564324e716098caed2ef8c1c34e34aa033ebfd395", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cortex-m v0.7.2
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]    Compiling cortex-m-rt v0.6.13
[INFO] [stderr]    Compiling fixed v1.6.0
[INFO] [stderr]    Compiling nrf52840-pac v0.9.0
[INFO] [stderr]    Compiling nrf-hal-common v0.12.1
[INFO] [stderr]    Compiling nrf52840-hal v0.12.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]     Checking panic-itm v0.4.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]  Documenting hello_nrf52 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: duplicate lang item in crate `std`: `panic_impl`.
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `panic_halt`.
[INFO] [stdout]   = note: first definition in `panic_halt` loaded from /opt/rustwide/target/debug/deps/libpanic_halt-4b6ee28e78cbac24.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/1.61.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-05b39ac0cb4c5688.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn panic(_: &core::panic::PanicInfo) -> ! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std`.
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/1.61.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-05b39ac0cb4c5688.rlib
[INFO] [stdout]    = note: second definition in the local crate (`hello_nrf52`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `hello_nrf52`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name hello_nrf52 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=495de0342445af5c -L dependency=/opt/rustwide/target/debug/deps --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-3b181e9f2ade7603.rmeta --extern cortex_m_rt=/opt/rustwide/target/debug/deps/libcortex_m_rt-ef7db46041b0b63e.rmeta --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-1992a1aef7ec41ac.rmeta --extern nrf52840_hal=/opt/rustwide/target/debug/deps/libnrf52840_hal-5af95c493ccb03cb.rmeta --extern panic_halt=/opt/rustwide/target/debug/deps/libpanic_halt-4b6ee28e78cbac24.rmeta --extern panic_itm=/opt/rustwide/target/debug/deps/libpanic_itm-5f0350710fc1c7b0.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6d689acede0da4fee56622a564324e716098caed2ef8c1c34e34aa033ebfd395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d689acede0da4fee56622a564324e716098caed2ef8c1c34e34aa033ebfd395", kill_on_drop: false }`
[INFO] [stdout] 6d689acede0da4fee56622a564324e716098caed2ef8c1c34e34aa033ebfd395