[INFO] fetching crate lpc8xx-hal 0.10.0...
[INFO] checking lpc8xx-hal-0.10.0 against master#aa067fb984d36462548bb785da221bfaf38253f0 for pr-122470
[INFO] extracting crate lpc8xx-hal 0.10.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate lpc8xx-hal 0.10.0 on toolchain aa067fb984d36462548bb785da221bfaf38253f0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa067fb984d36462548bb785da221bfaf38253f0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate lpc8xx-hal 0.10.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate lpc8xx-hal 0.10.0
[INFO] tweaked toml for crates.io crate lpc8xx-hal 0.10.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate lpc8xx-hal 0.10.0 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" "+aa067fb984d36462548bb785da221bfaf38253f0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panic-rtt-target v0.1.2
[INFO] [stderr]   Downloaded trybuild v1.0.65
[INFO] [stderr]   Downloaded critical-section v0.2.7
[INFO] [stderr]   Downloaded rtic-monotonic v0.1.0-rc.2
[INFO] [stderr]   Downloaded embedded-hal v1.0.0-alpha.6
[INFO] [stderr]   Downloaded cortex-m-rtic-macros v0.6.0-rc.4
[INFO] [stderr]   Downloaded rtic-syntax v0.5.0-rc.2
[INFO] [stderr]   Downloaded cortex-m v0.7.6
[INFO] [stderr]   Downloaded riscv v0.7.0
[INFO] [stderr]   Downloaded lpc82x-pac v0.8.1
[INFO] [stderr]   Downloaded lpc845-pac v0.4.1
[INFO] [stderr]   Downloaded cortex-m-rtic v0.6.0-rc.4
[INFO] [stderr]   Downloaded cortex-m-rt v0.7.1
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.10
[INFO] [stderr]   Downloaded rtic-core v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa067fb984d36462548bb785da221bfaf38253f0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6f697f663bd25a31a74f86652b87fb974f14712f9947963d52ee664a28b7f41
[INFO] running `Command { std: "docker" "start" "-a" "f6f697f663bd25a31a74f86652b87fb974f14712f9947963d52ee664a28b7f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6f697f663bd25a31a74f86652b87fb974f14712f9947963d52ee664a28b7f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6f697f663bd25a31a74f86652b87fb974f14712f9947963d52ee664a28b7f41", kill_on_drop: false }`
[INFO] [stdout] f6f697f663bd25a31a74f86652b87fb974f14712f9947963d52ee664a28b7f41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa067fb984d36462548bb785da221bfaf38253f0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 108cc057f17b2d688b561407f84d3783bce9d1c7c25261d8a4d095b7d462833e
[INFO] running `Command { std: "docker" "start" "-a" "108cc057f17b2d688b561407f84d3783bce9d1c7c25261d8a4d095b7d462833e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling cortex-m v0.7.6
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling semver v1.0.14
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.9.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling cortex-m-rtic v0.6.0-rc.4
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking embedded-hal v1.0.0-alpha.6
[INFO] [stderr]     Checking rtic-monotonic v0.1.0-rc.2
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking rtic-core v0.3.1
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.46/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 rustc_version v0.4.0
[INFO] [stderr]     Checking rtt-target v0.3.1
[INFO] [stderr]     Checking panic-rtt-target v0.1.2
[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" "108cc057f17b2d688b561407f84d3783bce9d1c7c25261d8a4d095b7d462833e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "108cc057f17b2d688b561407f84d3783bce9d1c7c25261d8a4d095b7d462833e", kill_on_drop: false }`
[INFO] [stdout] 108cc057f17b2d688b561407f84d3783bce9d1c7c25261d8a4d095b7d462833e