[INFO] fetching crate ltc690x 0.2.1...
[INFO] checking ltc690x-0.2.1 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate ltc690x 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ltc690x 0.2.1 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate ltc690x 0.2.1
[INFO] finished tweaking crates.io crate ltc690x 0.2.1
[INFO] tweaked toml for crates.io crate ltc690x 0.2.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ltc690x 0.2.1 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded as-slice v0.1.5
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded aligned v0.3.5
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.6.15
[INFO] [stderr]   Downloaded cortex-m v0.6.7
[INFO] [stderr]   Downloaded r0 v0.2.2
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.15
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded nrf52840-hal v0.12.2
[INFO] [stderr]   Downloaded rtic-syntax v0.4.0
[INFO] [stderr]   Downloaded cortex-m-rtic-macros v0.5.3
[INFO] [stderr]   Downloaded az v1.1.1
[INFO] [stderr]   Downloaded heapless v0.6.1
[INFO] [stderr]   Downloaded cortex-m-rtic v0.5.7
[INFO] [stderr]   Downloaded nrf-hal-common v0.12.2
[INFO] [stderr]   Downloaded typenum v1.13.0
[INFO] [stderr]   Downloaded semver v1.0.4
[INFO] [stderr]   Downloaded generic-array v0.14.4
[INFO] [stderr]   Downloaded generic-array v0.13.3
[INFO] [stderr]   Downloaded fixed v1.9.0
[INFO] [stderr]   Downloaded rtic-core v0.3.1
[INFO] [stderr]   Downloaded defmt-rtt v0.2.0
[INFO] [stderr]   Downloaded embedded-dma v0.1.2
[INFO] [stderr]   Downloaded panic-probe v0.2.0
[INFO] [stderr]   Downloaded nrf52840-pac v0.9.0
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e96ee0e6441ac065a5e7618fdd6f81629f45429c8ac9d990328055148b06b1d
[INFO] running `Command { std: "docker" "start" "-a" "1e96ee0e6441ac065a5e7618fdd6f81629f45429c8ac9d990328055148b06b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e96ee0e6441ac065a5e7618fdd6f81629f45429c8ac9d990328055148b06b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e96ee0e6441ac065a5e7618fdd6f81629f45429c8ac9d990328055148b06b1d", kill_on_drop: false }`
[INFO] [stdout] 1e96ee0e6441ac065a5e7618fdd6f81629f45429c8ac9d990328055148b06b1d
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f034fc05b82cdac877f9bf069b6f6d260c744e21b0f2517922bf0bbebeca920
[INFO] running `Command { std: "docker" "start" "-a" "7f034fc05b82cdac877f9bf069b6f6d260c744e21b0f2517922bf0bbebeca920", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling cortex-m v0.7.3
[INFO] [stderr]    Compiling cortex-m-rt v0.6.15
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling nrf52840-pac v0.9.0
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]    Compiling defmt-parser v0.2.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling fixed v1.9.0
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling nrf-hal-common v0.12.2
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]    Compiling heapless v0.6.1
[INFO] [stderr]     Checking bytemuck v1.7.2
[INFO] [stderr]     Checking embedded-dma v0.1.2
[INFO] [stderr]    Compiling nrf52840-hal v0.12.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]    Compiling cortex-m-rtic v0.5.7
[INFO] [stderr]    Compiling panic-probe v0.2.0
[INFO] [stderr]     Checking rtic-core v0.3.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling defmt v0.2.3
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]     Checking aligned v0.3.5
[INFO] [stderr]    Compiling rtic-syntax v0.4.0
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.6.15
[INFO] [stderr]    Compiling defmt-macros v0.2.3
[INFO] [stderr]    Compiling cortex-m-rtic-macros v0.5.3
[INFO] [stderr]     Checking defmt-rtt v0.2.0
[INFO] [stderr]     Checking ltc690x v0.2.1 (/opt/rustwide/workdir)
[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] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ltc690x` (example "nrf52840") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7f034fc05b82cdac877f9bf069b6f6d260c744e21b0f2517922bf0bbebeca920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f034fc05b82cdac877f9bf069b6f6d260c744e21b0f2517922bf0bbebeca920", kill_on_drop: false }`
[INFO] [stdout] 7f034fc05b82cdac877f9bf069b6f6d260c744e21b0f2517922bf0bbebeca920