[INFO] fetching crate a4 0.0.4...
[INFO] checking a4-0.0.4 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] extracting crate a4 0.0.4 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate a4 0.0.4
[INFO] finished tweaking crates.io crate a4 0.0.4
[INFO] tweaked toml for crates.io crate a4 0.0.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate a4 0.0.4 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate a4 0.0.4 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded postcard v0.7.2
[INFO] [stderr]   Downloaded volatile-register v0.2.1
[INFO] [stderr]   Downloaded rzcobs v0.1.2
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.5
[INFO] [stderr]   Downloaded rcobs v0.1.1
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded a4-core v0.0.4
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded embedded-hal v0.2.6
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded spin v0.9.2
[INFO] [stderr]   Downloaded riscv v0.7.0
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded critical-section v0.2.5
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded cortex-m v0.7.3
[INFO] [stderr]   Downloaded heapless v0.7.8
[INFO] [stderr]   Downloaded postcard-cobs v0.1.5-pre
[INFO] [stderr]   Downloaded kolben v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c059c6cefcc56c0bbc07568f4e7ed09b3d2c563033bba87876cc3e508dbb193
[INFO] running `Command { std: "docker" "start" "-a" "0c059c6cefcc56c0bbc07568f4e7ed09b3d2c563033bba87876cc3e508dbb193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c059c6cefcc56c0bbc07568f4e7ed09b3d2c563033bba87876cc3e508dbb193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c059c6cefcc56c0bbc07568f4e7ed09b3d2c563033bba87876cc3e508dbb193", kill_on_drop: false }`
[INFO] [stdout] 0c059c6cefcc56c0bbc07568f4e7ed09b3d2c563033bba87876cc3e508dbb193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e46cec9022a618c83058ada699e65d2a0989e5445af9833fd59cdd1eeedc1c49
[INFO] running `Command { std: "docker" "start" "-a" "e46cec9022a618c83058ada699e65d2a0989e5445af9833fd59cdd1eeedc1c49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling heapless v0.7.8
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre
[INFO] [stderr]     Checking rzcobs v0.1.2
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking rcobs v0.1.1
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking kolben v0.0.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking postcard v0.7.2
[INFO] [stderr]     Checking a4-core v0.0.4
[INFO] [stderr]     Checking a4 v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.18s
[INFO] running `Command { std: "docker" "inspect" "e46cec9022a618c83058ada699e65d2a0989e5445af9833fd59cdd1eeedc1c49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e46cec9022a618c83058ada699e65d2a0989e5445af9833fd59cdd1eeedc1c49", kill_on_drop: false }`
[INFO] [stdout] e46cec9022a618c83058ada699e65d2a0989e5445af9833fd59cdd1eeedc1c49