[INFO] fetching crate potatonet 0.4.2...
[INFO] checking potatonet-0.4.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate potatonet 0.4.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate potatonet 0.4.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate potatonet 0.4.2
[INFO] finished tweaking crates.io crate potatonet 0.4.2
[INFO] tweaked toml for crates.io crate potatonet 0.4.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate potatonet 0.4.2 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rmp v0.8.9
[INFO] [stderr]   Downloaded arrayref v0.3.5
[INFO] [stderr]   Downloaded smallstr v0.1.0
[INFO] [stderr]   Downloaded wincolor v1.0.2
[INFO] [stderr]   Downloaded termcolor v1.0.5
[INFO] [stderr]   Downloaded potatonet-bus v0.4.1
[INFO] [stderr]   Downloaded potatonet-client v0.4.1
[INFO] [stderr]   Downloaded arrayvec v0.5.1
[INFO] [stderr]   Downloaded backtrace v0.3.41
[INFO] [stderr]   Downloaded async-std v1.4.0
[INFO] [stderr]   Downloaded futures-channel v0.3.1
[INFO] [stderr]   Downloaded backtrace-sys v0.1.32
[INFO] [stderr]   Downloaded futures-util v0.3.1
[INFO] [stderr]   Downloaded potatonet-node v0.4.2
[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded unicode-normalization v0.1.11
[INFO] [stderr]   Downloaded mortal v0.2.1
[INFO] [stderr]   Downloaded linefeed v0.6.0
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded crossbeam-channel v0.4.0
[INFO] [stderr]   Downloaded crossbeam-epoch v0.8.0
[INFO] [stderr]   Downloaded bytes v0.5.3
[INFO] [stderr]   Downloaded serde v1.0.104
[INFO] [stderr]   Downloaded syn v1.0.13
[INFO] [stderr]   Downloaded crossbeam-utils v0.6.6
[INFO] [stderr]   Downloaded rust-argon2 v0.5.1
[INFO] [stderr]   Downloaded redox_users v0.3.1
[INFO] [stderr]   Downloaded terminfo v0.6.1
[INFO] [stderr]   Downloaded smallvec v1.1.0
[INFO] [stderr]   Downloaded getrandom v0.1.14
[INFO] [stderr]   Downloaded anyhow v1.0.26
[INFO] [stderr]   Downloaded async-attributes v1.1.1
[INFO] [stderr]   Downloaded async-task v1.2.0
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded crossbeam-utils v0.7.0
[INFO] [stderr]   Downloaded kv-log-macro v1.0.4
[INFO] [stderr]   Downloaded once_cell v1.2.0
[INFO] [stderr]   Downloaded async-trait v0.1.22
[INFO] [stderr]   Downloaded futures-executor v0.3.1
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.11
[INFO] [stderr]   Downloaded futures v0.3.1
[INFO] [stderr]   Downloaded thiserror v1.0.9
[INFO] [stderr]   Downloaded num-traits v0.2.10
[INFO] [stderr]   Downloaded potatonet-codegen v0.4.1
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded broadcaster v0.2.6
[INFO] [stderr]   Downloaded memoffset v0.5.3
[INFO] [stderr]   Downloaded scopeguard v1.0.0
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.2
[INFO] [stderr]   Downloaded hermit-abi v0.1.6
[INFO] [stderr]   Downloaded num_cpus v1.11.1
[INFO] [stderr]   Downloaded pin-project-lite v0.1.2
[INFO] [stderr]   Downloaded futures-core v0.3.1
[INFO] [stderr]   Downloaded futures-io v0.3.1
[INFO] [stderr]   Downloaded futures-macro v0.3.1
[INFO] [stderr]   Downloaded futures-sink v0.3.1
[INFO] [stderr]   Downloaded futures-task v0.3.1
[INFO] [stderr]   Downloaded pin-utils v0.1.0-alpha.4
[INFO] [stderr]   Downloaded proc-macro-nested v0.1.3
[INFO] [stderr]   Downloaded thiserror-impl v1.0.9
[INFO] [stderr]   Downloaded potatonet-common v0.4.2
[INFO] [stderr]   Downloaded byteorder v1.3.2
[INFO] [stderr]   Downloaded rmp-serde v0.14.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.7
[INFO] [stderr]   Downloaded serde_derive v1.0.104
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 846ab3f96bc8e700c68022483931e3d2eec39d2dd3a9111955368672800bbb6f
[INFO] running `Command { std: "docker" "start" "-a" "846ab3f96bc8e700c68022483931e3d2eec39d2dd3a9111955368672800bbb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "846ab3f96bc8e700c68022483931e3d2eec39d2dd3a9111955368672800bbb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "846ab3f96bc8e700c68022483931e3d2eec39d2dd3a9111955368672800bbb6f", kill_on_drop: false }`
[INFO] [stdout] 846ab3f96bc8e700c68022483931e3d2eec39d2dd3a9111955368672800bbb6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1fee2e1e1fca3a74f01921b3fe36364c374f9a539b87686201e7f014f0158f0
[INFO] running `Command { std: "docker" "start" "-a" "f1fee2e1e1fca3a74f01921b3fe36364c374f9a539b87686201e7f014f0158f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking async-task v1.2.0
[INFO] [stderr]     Checking crossbeam-channel v0.4.0
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking pin-project-lite v0.1.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking once_cell v1.2.0
[INFO] [stderr]     Checking rmp v0.8.9
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling terminfo v0.6.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking broadcaster v0.2.6
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking smallstr v0.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking rmp-serde v0.14.0
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling async-trait v0.1.22
[INFO] [stderr]    Compiling potatonet-codegen v0.4.1
[INFO] [stderr]     Checking async-std v1.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking mortal v0.2.1
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]     Checking linefeed v0.6.0
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking potatonet-common v0.4.2
[INFO] [stderr]     Checking potatonet-client v0.4.1
[INFO] [stderr]     Checking potatonet-bus v0.4.1
[INFO] [stderr]     Checking potatonet-node v0.4.2
[INFO] [stderr]     Checking potatonet v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 54.58s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3, terminfo v0.6.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "f1fee2e1e1fca3a74f01921b3fe36364c374f9a539b87686201e7f014f0158f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1fee2e1e1fca3a74f01921b3fe36364c374f9a539b87686201e7f014f0158f0", kill_on_drop: false }`
[INFO] [stdout] f1fee2e1e1fca3a74f01921b3fe36364c374f9a539b87686201e7f014f0158f0