[INFO] fetching crate drone-sd-stm32 0.2.2...
[INFO] documenting drone-sd-stm32-0.2.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate drone-sd-stm32 0.2.2 into /workspace/builds/worker-73/source
[INFO] validating manifest of crates.io crate drone-sd-stm32 0.2.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drone-sd-stm32 0.2.2
[INFO] finished tweaking crates.io crate drone-sd-stm32 0.2.2
[INFO] tweaked toml for crates.io crate drone-sd-stm32 0.2.2 written to /workspace/builds/worker-73/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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 drone-sd-core v0.2.2
[INFO] [stderr]   Downloaded drone-stm32 v0.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8f30a63c865b08fe3429b7043d10b134d15ad3ce3049f25896868502292b035
[INFO] running `Command { std: "docker" "start" "-a" "e8f30a63c865b08fe3429b7043d10b134d15ad3ce3049f25896868502292b035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8f30a63c865b08fe3429b7043d10b134d15ad3ce3049f25896868502292b035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8f30a63c865b08fe3429b7043d10b134d15ad3ce3049f25896868502292b035", kill_on_drop: false }`
[INFO] [stdout] e8f30a63c865b08fe3429b7043d10b134d15ad3ce3049f25896868502292b035
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a437db494c4e228873919be49ed422fb66d4dbec16fd6b9a1046d5c05f5c9dfe
[INFO] running `Command { std: "docker" "start" "-a" "a437db494c4e228873919be49ed422fb66d4dbec16fd6b9a1046d5c05f5c9dfe", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking futures-core-preview v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling gimli v0.26.1
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking drone-ctypes v0.8.3
[INFO] [stderr]     Checking futures-channel-preview v0.2.2
[INFO] [stderr]     Checking futures-io-preview v0.2.2
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking futures-sink-preview v0.2.2
[INFO] [stderr]    Compiling miniz_oxide v0.5.1
[INFO] [stderr]     Checking futures-util-preview v0.2.2
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]     Checking futures-executor-preview v0.2.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling object v0.28.4
[INFO] [stderr]     Checking futures-stable-preview v0.2.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking futures-async-runtime-preview v0.2.3
[INFO] [stderr]     Checking futures-preview v0.2.2
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling drone-macros-core v0.8.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/drone-macros-core-0.8.3/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `drone-macros-core` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a437db494c4e228873919be49ed422fb66d4dbec16fd6b9a1046d5c05f5c9dfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a437db494c4e228873919be49ed422fb66d4dbec16fd6b9a1046d5c05f5c9dfe", kill_on_drop: false }`
[INFO] [stdout] a437db494c4e228873919be49ed422fb66d4dbec16fd6b9a1046d5c05f5c9dfe