[INFO] fetching crate bxcan 0.6.2...
[INFO] checking bxcan-0.6.2 against master#43d9f3859e0204e764161ee085a360274b5f3e9a for pr-97346
[INFO] extracting crate bxcan 0.6.2 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate bxcan 0.6.2 on toolchain 43d9f3859e0204e764161ee085a360274b5f3e9a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+43d9f3859e0204e764161ee085a360274b5f3e9a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bxcan 0.6.2
[INFO] finished tweaking crates.io crate bxcan 0.6.2
[INFO] tweaked toml for crates.io crate bxcan 0.6.2 written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+43d9f3859e0204e764161ee085a360274b5f3e9a" "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" "+43d9f3859e0204e764161ee085a360274b5f3e9a" "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 embedded-can v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+43d9f3859e0204e764161ee085a360274b5f3e9a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 650fe7382ecc333fe392325e77fc4d42b66ebff134d6b93cde31bab9805ebf12
[INFO] running `Command { std: "docker" "start" "-a" "650fe7382ecc333fe392325e77fc4d42b66ebff134d6b93cde31bab9805ebf12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "650fe7382ecc333fe392325e77fc4d42b66ebff134d6b93cde31bab9805ebf12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "650fe7382ecc333fe392325e77fc4d42b66ebff134d6b93cde31bab9805ebf12", kill_on_drop: false }`
[INFO] [stdout] 650fe7382ecc333fe392325e77fc4d42b66ebff134d6b93cde31bab9805ebf12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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" "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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+43d9f3859e0204e764161ee085a360274b5f3e9a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecf48d8fa88c254200a895daf24e6087d2cdd3ef9305cf921201149e79226250
[INFO] running `Command { std: "docker" "start" "-a" "ecf48d8fa88c254200a895daf24e6087d2cdd3ef9305cf921201149e79226250", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking bxcan v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/readme.rs:5:9
[INFO] [stdout]    |
[INFO] [stdout] 5  |         #[doc = $e]
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 6  |         extern "C" {}
[INFO] [stdout]    |         ------------- rustdoc does not generate documentation for extern block
[INFO] [stdout] ...
[INFO] [stdout] 10 | doc!(include_str!("../README.md"));
[INFO] [stdout]    | ---------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: this warning originates in the macro `doc` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/readme.rs:5:9
[INFO] [stdout]    |
[INFO] [stdout] 5  |         #[doc = $e]
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 6  |         extern "C" {}
[INFO] [stdout]    |         ------------- rustdoc does not generate documentation for extern block
[INFO] [stdout] ...
[INFO] [stdout] 10 | doc!(include_str!("../README.md"));
[INFO] [stdout]    | ---------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: this warning originates in the macro `doc` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.00s
[INFO] running `Command { std: "docker" "inspect" "ecf48d8fa88c254200a895daf24e6087d2cdd3ef9305cf921201149e79226250", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecf48d8fa88c254200a895daf24e6087d2cdd3ef9305cf921201149e79226250", kill_on_drop: false }`
[INFO] [stdout] ecf48d8fa88c254200a895daf24e6087d2cdd3ef9305cf921201149e79226250