[INFO] fetching crate persistent-buff 0.2.6...
[INFO] checking persistent-buff-0.2.6 against try#d57d2d63e6f308d854fedbafd91d7721b7c651af for pr-110141
[INFO] extracting crate persistent-buff 0.2.6 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate persistent-buff 0.2.6 on toolchain d57d2d63e6f308d854fedbafd91d7721b7c651af
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d57d2d63e6f308d854fedbafd91d7721b7c651af" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate persistent-buff 0.2.6
[INFO] finished tweaking crates.io crate persistent-buff 0.2.6
[INFO] tweaked toml for crates.io crate persistent-buff 0.2.6 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate persistent-buff 0.2.6 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" "+d57d2d63e6f308d854fedbafd91d7721b7c651af" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/opt/rustwide/cargo-home/bin/cargo" "+d57d2d63e6f308d854fedbafd91d7721b7c651af" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db77ac2e6ff134c1cede8fdacba8f7771ca216d71dbba531846fbb70cff53728
[INFO] running `Command { std: "docker" "start" "-a" "db77ac2e6ff134c1cede8fdacba8f7771ca216d71dbba531846fbb70cff53728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db77ac2e6ff134c1cede8fdacba8f7771ca216d71dbba531846fbb70cff53728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db77ac2e6ff134c1cede8fdacba8f7771ca216d71dbba531846fbb70cff53728", kill_on_drop: false }`
[INFO] [stdout] db77ac2e6ff134c1cede8fdacba8f7771ca216d71dbba531846fbb70cff53728
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:97d61d7686bf65f8ecb15491ab51835e82dc9176a96a831f143a431b191fc501" "/opt/rustwide/cargo-home/bin/cargo" "+d57d2d63e6f308d854fedbafd91d7721b7c651af" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37b945b36c229d93450188a865134021f37ee1b66d2fde3814f03ab9bf47971a
[INFO] running `Command { std: "docker" "start" "-a" "37b945b36c229d93450188a865134021f37ee1b66d2fde3814f03ab9bf47971a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling defmt v0.3.2
[INFO] [stderr]    Compiling defmt-macros v0.3.3
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling defmt-parser v0.3.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking critical-section v1.1.1
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling cortex-m-rt v0.7.2
[INFO] [stderr]    Compiling defmt-rtt v0.4.0
[INFO] [stderr]    Compiling panic-probe v0.3.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking persistent-buff v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout]   |
[INFO] [stdout]   = note: this can occur when a binary crate with `#![no_std]` is compiled for a target where `eh_personality` is defined in the standard library
[INFO] [stdout]   = help: you may be able to compile for a target that doesn't need `eh_personality`, specify a target with `--target` or in `.cargo/config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `persistent-buff` (example "usage") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "37b945b36c229d93450188a865134021f37ee1b66d2fde3814f03ab9bf47971a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37b945b36c229d93450188a865134021f37ee1b66d2fde3814f03ab9bf47971a", kill_on_drop: false }`
[INFO] [stdout] 37b945b36c229d93450188a865134021f37ee1b66d2fde3814f03ab9bf47971a