[INFO] fetching crate tophat 0.3.0...
[INFO] checking tophat-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate tophat 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate tophat 0.3.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tophat 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate tophat 0.3.0
[INFO] tweaked toml for crates.io crate tophat 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate tophat 0.3.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded type-map v0.3.0
[INFO] [stderr]   Downloaded standback v0.2.13
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.15
[INFO] [stderr]   Downloaded async-net v1.5.0
[INFO] [stderr]   Downloaded loom v0.3.6
[INFO] [stderr]   Downloaded sharded-slab v0.1.0
[INFO] [stderr]   Downloaded headers v0.3.2
[INFO] [stderr]   Downloaded pem v0.8.2
[INFO] [stderr]   Downloaded path-tree v0.1.12
[INFO] [stderr]   Downloaded async-fs v1.5.0
[INFO] [stderr]   Downloaded generator v0.6.23
[INFO] [stderr]   Downloaded smallvec v1.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b338466edd8bb0dade71cc9cb0e803dd314282d59986bfbc563eaec98aef6147
[INFO] running `Command { std: "docker" "start" "-a" "b338466edd8bb0dade71cc9cb0e803dd314282d59986bfbc563eaec98aef6147", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b338466edd8bb0dade71cc9cb0e803dd314282d59986bfbc563eaec98aef6147", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b338466edd8bb0dade71cc9cb0e803dd314282d59986bfbc563eaec98aef6147", kill_on_drop: false }`
[INFO] [stdout] b338466edd8bb0dade71cc9cb0e803dd314282d59986bfbc563eaec98aef6147
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae536b58a76f80424a07f1f86c581fe12e2e8c1acb0901c808316b73b5475239
[INFO] running `Command { std: "docker" "start" "-a" "ae536b58a76f80424a07f1f86c581fe12e2e8c1acb0901c808316b73b5475239", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking simple-mutex v1.1.5
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking http v0.2.2
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking async-dup v1.2.2
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking smallvec v1.5.1
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking easy-parallel v3.1.0
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking byte-pool v0.2.2
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking async-net v1.5.0
[INFO] [stderr]     Checking async-process v1.0.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking tophat v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stdout] warning: the item `smol` is imported redundantly
[INFO] [stdout]    --> src/server/decode.rs:263:9
[INFO] [stdout]     |
[INFO] [stdout] 263 |     use smol;
[INFO] [stdout]     |         ^^^^ the item `smol` is already defined by prelude
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.40s
[INFO] running `Command { std: "docker" "inspect" "ae536b58a76f80424a07f1f86c581fe12e2e8c1acb0901c808316b73b5475239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae536b58a76f80424a07f1f86c581fe12e2e8c1acb0901c808316b73b5475239", kill_on_drop: false }`
[INFO] [stdout] ae536b58a76f80424a07f1f86c581fe12e2e8c1acb0901c808316b73b5475239