[INFO] cloning repository https://github.com/ehelbig1/microbit-heart
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ehelbig1/microbit-heart" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fehelbig1%2Fmicrobit-heart", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fehelbig1%2Fmicrobit-heart'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e24c041daeec8eec563b8ad154ed4da59982a98
[INFO] checking ehelbig1/microbit-heart against try#b32fc44666c052e7cf07ab471bfb6f9ec571902f for pr-138676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fehelbig1%2Fmicrobit-heart" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ehelbig1/microbit-heart on toolchain b32fc44666c052e7cf07ab471bfb6f9ec571902f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/ehelbig1/microbit-heart
[INFO] finished tweaking git repo https://github.com/ehelbig1/microbit-heart
[INFO] tweaked toml for git repo https://github.com/ehelbig1/microbit-heart written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ehelbig1/microbit-heart 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" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8cfabc2bb0937bea8c760f9b250e06bb741df2457eb2067bbd4e4c88a40f5475
[INFO] running `Command { std: "docker" "start" "-a" "8cfabc2bb0937bea8c760f9b250e06bb741df2457eb2067bbd4e4c88a40f5475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cfabc2bb0937bea8c760f9b250e06bb741df2457eb2067bbd4e4c88a40f5475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cfabc2bb0937bea8c760f9b250e06bb741df2457eb2067bbd4e4c88a40f5475", kill_on_drop: false }`
[INFO] [stdout] 8cfabc2bb0937bea8c760f9b250e06bb741df2457eb2067bbd4e4c88a40f5475
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17b817cf935b8bc2943f5e27eefc2014d29c668eaa602bd8a8cd19937957d597
[INFO] running `Command { std: "docker" "start" "-a" "17b817cf935b8bc2943f5e27eefc2014d29c668eaa602bd8a8cd19937957d597", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cortex-m-rt v0.7.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking critical-section v1.1.1
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling nrf52833-pac v0.10.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling fixed v1.23.1
[INFO] [stderr]     Checking critical-section v0.2.8
[INFO] [stderr]     Checking half v2.3.1
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling nrf-hal-common v0.14.1
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking usb-device v0.2.9
[INFO] [stderr]     Checking embedded-dma v0.1.2
[INFO] [stderr]     Checking embedded-storage v0.2.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling nrf52833-hal v0.14.1
[INFO] [stderr]     Checking nrf-usbd v0.1.1
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking tiny-led-matrix v1.0.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rtt-target v0.3.1
[INFO] [stderr]    Compiling replace-me v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking panic-rtt-target v0.1.2
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking rtt-target v0.4.0
[INFO] [stderr]    Compiling heapless v0.7.16
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stderr]     Checking microbit-common v0.13.0
[INFO] [stderr]     Checking microbit-v2 v0.13.0
[INFO] [stdout] warning: unused import: `microbit::hal::prelude::*`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use microbit::hal::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let board = microbit::Board::take().unwrap();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `replace-me` (bin "replace-me") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `microbit::hal::prelude::*`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use microbit::hal::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: duplicate lang item in crate `std` (which `test` depends on): `panic_impl`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `panic_rtt_target` (which `replace_me` depends on)
[INFO] [stdout]   = note: first definition in `panic_rtt_target` loaded from /opt/rustwide/target/debug/deps/libpanic_rtt_target-ddc37ad7cd0e9dd5.rmeta
[INFO] [stdout]   = note: second definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/b32fc44666c052e7cf07ab471bfb6f9ec571902f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-168b2af3cdbd9a8b.rlib
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `replace-me` (bin "replace-me" test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "17b817cf935b8bc2943f5e27eefc2014d29c668eaa602bd8a8cd19937957d597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17b817cf935b8bc2943f5e27eefc2014d29c668eaa602bd8a8cd19937957d597", kill_on_drop: false }`
[INFO] [stdout] 17b817cf935b8bc2943f5e27eefc2014d29c668eaa602bd8a8cd19937957d597