[INFO] fetching crate flipdot 0.6.0...
[INFO] checking flipdot-0.6.0 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate flipdot 0.6.0 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate flipdot 0.6.0 on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flipdot 0.6.0
[INFO] finished tweaking crates.io crate flipdot 0.6.0
[INFO] tweaked toml for crates.io crate flipdot 0.6.0 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] crate crates.io crate flipdot 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "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 redox_syscall v0.1.52
[INFO] [stderr]   Downloaded libc v0.2.51
[INFO] [stderr]   Downloaded flipdot-testing v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9f05ec83f7f3ba74c147d699ad4f4be8c89d76712f344c4624abf1dc6e79a91
[INFO] running `Command { std: "docker" "start" "-a" "d9f05ec83f7f3ba74c147d699ad4f4be8c89d76712f344c4624abf1dc6e79a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9f05ec83f7f3ba74c147d699ad4f4be8c89d76712f344c4624abf1dc6e79a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9f05ec83f7f3ba74c147d699ad4f4be8c89d76712f344c4624abf1dc6e79a91", kill_on_drop: false }`
[INFO] [stdout] d9f05ec83f7f3ba74c147d699ad4f4be8c89d76712f344c4624abf1dc6e79a91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e59658fb333634dc40933216b0aa71d5d432c241a617151cf6ad28016d05fafd
[INFO] running `Command { std: "docker" "start" "-a" "e59658fb333634dc40933216b0aa71d5d432c241a617151cf6ad28016d05fafd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.16
[INFO] [stderr]    Compiling derive_more v0.99.5
[INFO] [stderr]     Checking thiserror v1.0.16
[INFO] [stderr]     Checking flipdot-core v0.6.0
[INFO] [stderr]     Checking flipdot-serial v0.6.0
[INFO] [stderr]     Checking flipdot-testing v0.6.0
[INFO] [stderr]     Checking flipdot v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.10s
[INFO] running `Command { std: "docker" "inspect" "e59658fb333634dc40933216b0aa71d5d432c241a617151cf6ad28016d05fafd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59658fb333634dc40933216b0aa71d5d432c241a617151cf6ad28016d05fafd", kill_on_drop: false }`
[INFO] [stdout] e59658fb333634dc40933216b0aa71d5d432c241a617151cf6ad28016d05fafd