[INFO] cloning repository https://github.com/jeremystucki/microbit-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeremystucki/microbit-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremystucki%2Fmicrobit-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremystucki%2Fmicrobit-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 985b59d27e3ba423ae9763b8687f61421ed11219
[INFO] checking jeremystucki/microbit-playground against 79c0559184f27f4433a6fbc260b950d06d4a4889 for pr-162233-crater-rollup
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremystucki%2Fmicrobit-playground" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/jeremystucki/microbit-playground
[INFO] finished tweaking git repo https://github.com/jeremystucki/microbit-playground
[INFO] tweaked toml for git repo https://github.com/jeremystucki/microbit-playground written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jeremystucki/microbit-playground on toolchain 79c0559184f27f4433a6fbc260b950d06d4a4889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+79c0559184f27f4433a6fbc260b950d06d4a4889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jeremystucki/microbit-playground 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" "+79c0559184f27f4433a6fbc260b950d06d4a4889" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded vcell v0.1.2
[INFO] [stderr]   Downloaded void v1.0.2
[INFO] [stderr]   Downloaded nrf51-hal v0.7.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.12
[INFO] [stderr]   Downloaded cast v0.2.3
[INFO] [stderr]   Downloaded aligned v0.3.2
[INFO] [stderr]   Downloaded stable_deref_trait v1.1.1
[INFO] [stderr]   Downloaded nb v0.1.2
[INFO] [stderr]   Downloaded as-slice v0.1.2
[INFO] [stderr]   Downloaded generic-array v0.13.2
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded r0 v0.2.2
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.8
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded embedded-hal v0.2.3
[INFO] [stderr]   Downloaded cortex-m v0.6.2
[INFO] [stderr]   Downloaded heapless v0.5.3
[INFO] [stderr]   Downloaded nrf51 v0.7.0
[INFO] [stderr]   Downloaded fpa v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb
[INFO] running `Command { std: "docker" "start" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb" "/opt/rustwide/cargo-home/bin/cargo" "+79c0559184f27f4433a6fbc260b950d06d4a4889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb" "/opt/rustwide/cargo-home/bin/cargo" "+79c0559184f27f4433a6fbc260b950d06d4a4889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling cortex-m v0.6.2
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]    Compiling fpa v0.1.0
[INFO] [stderr]    Compiling nrf51 v0.7.0
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nb v0.1.2
[INFO] [stderr]    Compiling heapless v0.5.3
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking as-slice v0.1.2
[INFO] [stderr]     Checking aligned v0.3.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking nrf51-hal v0.7.1
[INFO] [stderr]     Checking microbit-simple-display v0.1.0 (/opt/rustwide/workdir/simple-display)
[INFO] [stderr]     Checking microbit-scrolling-display v0.1.0 (/opt/rustwide/workdir/scrolling-display)
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:26:78
[INFO] [stdout]    |
[INFO] [stdout] 26 | static CURRENT_INDEX: Mutex<RefCell<usize>> = Mutex::new(RefCell::new(usize::max_value()));
[INFO] [stdout]    |                                                                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:85:57
[INFO] [stdout]    |
[INFO] [stdout] 85 |         *CURRENT_INDEX.borrow(cs).borrow_mut() = usize::max_value();
[INFO] [stdout]    |                                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:97:57
[INFO] [stdout]    |
[INFO] [stdout] 97 |         *CURRENT_INDEX.borrow(cs).borrow_mut() = usize::max_value();
[INFO] [stdout]    |                                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:26:78
[INFO] [stdout]    |
[INFO] [stdout] 26 | static CURRENT_INDEX: Mutex<RefCell<usize>> = Mutex::new(RefCell::new(usize::max_value()));
[INFO] [stdout]    |                                                                              ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:85:57
[INFO] [stdout]    |
[INFO] [stdout] 85 |         *CURRENT_INDEX.borrow(cs).borrow_mut() = usize::max_value();
[INFO] [stdout]    |                                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl usize>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> scrolling-display/src/lib.rs:97:57
[INFO] [stdout]    |
[INFO] [stdout] 97 |         *CURRENT_INDEX.borrow(cs).borrow_mut() = usize::max_value();
[INFO] [stdout]    |                                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking microbit-playground v0.1.0 (/opt/rustwide/workdir/microbit-playground)
[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] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> microbit-playground/src/main.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout] 19 | |     loop {}
[INFO] [stdout] 20 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/79c0559184f27f4433a6fbc260b950d06d4a4889/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-453218b5e9634890.rmeta
[INFO] [stdout]    = note: second definition in the local crate (`microbit_playground`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `microbit-playground` (bin "microbit-playground" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `microbit-playground` (bin "microbit-playground") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb", kill_on_drop: false }`
[INFO] [stdout] 4f7746c1755ef504a8f4fb2d375cbf2b2ec686d64ce2f24419a2095478f6c8cb
