[INFO] cloning repository https://github.com/mendelt/bluepill-arpeggiator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mendelt/bluepill-arpeggiator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmendelt%2Fbluepill-arpeggiator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmendelt%2Fbluepill-arpeggiator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15235bcb00a9c4f274a3679d8ef341eb185cc7a0
[INFO] checking mendelt/bluepill-arpeggiator against master#e08b80c0fb7667bdcd040761891701e576c42ec8 for pr-129021
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmendelt%2Fbluepill-arpeggiator" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mendelt/bluepill-arpeggiator on toolchain e08b80c0fb7667bdcd040761891701e576c42ec8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e08b80c0fb7667bdcd040761891701e576c42ec8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] finished tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] tweaked toml for git repo https://github.com/mendelt/bluepill-arpeggiator written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mendelt/bluepill-arpeggiator 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" "+e08b80c0fb7667bdcd040761891701e576c42ec8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking mendelt/bluepill-arpeggiator against try#f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5 for pr-129021
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmendelt%2Fbluepill-arpeggiator" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mendelt/bluepill-arpeggiator on toolchain f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] finished tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] tweaked toml for git repo https://github.com/mendelt/bluepill-arpeggiator written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mendelt/bluepill-arpeggiator 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" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking mendelt/bluepill-arpeggiator against try#f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5 for pr-129021
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmendelt%2Fbluepill-arpeggiator" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mendelt/bluepill-arpeggiator on toolchain f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] finished tweaking git repo https://github.com/mendelt/bluepill-arpeggiator
[INFO] tweaked toml for git repo https://github.com/mendelt/bluepill-arpeggiator written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mendelt/bluepill-arpeggiator 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" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "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 gcd v2.2.0
[INFO] [stderr]   Downloaded cortex-m-rt v0.7.2
[INFO] [stderr]   Downloaded stm32f1xx-hal v0.10.0
[INFO] [stderr]   Downloaded embedded-midi v0.1.2
[INFO] [stderr]   Downloaded midi-types v0.1.5
[INFO] [stderr]   Downloaded stm32f1 v0.15.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d135e9ea60208817112d4a4cf1471bbd66cb334a2adcc01b543a0c0ae9df88b
[INFO] running `Command { std: "docker" "start" "-a" "4d135e9ea60208817112d4a4cf1471bbd66cb334a2adcc01b543a0c0ae9df88b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d135e9ea60208817112d4a4cf1471bbd66cb334a2adcc01b543a0c0ae9df88b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d135e9ea60208817112d4a4cf1471bbd66cb334a2adcc01b543a0c0ae9df88b", kill_on_drop: false }`
[INFO] [stdout] 4d135e9ea60208817112d4a4cf1471bbd66cb334a2adcc01b543a0c0ae9df88b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f781a78d815e6a304bf6061b8a8fa69d7ce8dfd5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f4ec7641f40c51a34b13cf8382a290e52ff0b180917c8620b50ea87139364a2
[INFO] running `Command { std: "docker" "start" "-a" "0f4ec7641f40c51a34b13cf8382a290e52ff0b180917c8620b50ea87139364a2", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling cortex-m-rt v0.7.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.5.0
[INFO] [stderr]     Checking gcd v2.2.0
[INFO] [stderr]    Compiling stm32-usbd v0.6.0
[INFO] [stderr]    Compiling stm32f1 v0.15.1
[INFO] [stderr]     Checking usb-device v0.2.9
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking fugit v0.3.6
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking midi-types v0.1.5
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking embedded-dma v0.2.0
[INFO] [stderr]     Checking fugit-timer v0.1.3
[INFO] [stderr]     Checking bxcan v0.7.0
[INFO] [stderr]     Checking embedded-midi v0.1.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.49/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0f4ec7641f40c51a34b13cf8382a290e52ff0b180917c8620b50ea87139364a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f4ec7641f40c51a34b13cf8382a290e52ff0b180917c8620b50ea87139364a2", kill_on_drop: false }`
[INFO] [stdout] 0f4ec7641f40c51a34b13cf8382a290e52ff0b180917c8620b50ea87139364a2