[INFO] fetching crate tower-async 0.2.0...
[INFO] checking tower-async-0.2.0 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate tower-async 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate tower-async 0.2.0
[INFO] finished tweaking crates.io crate tower-async 0.2.0
[INFO] tweaked toml for crates.io crate tower-async 0.2.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tower-async 0.2.0 on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 80 packages to latest compatible versions
[INFO] [stderr]       Adding http v0.2.12 (available: v1.4.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 956e7c2333589608f1a91a9c49ed3287be2975302fdabb96b2891b8324ae9000
[INFO] running `Command { std: "docker" "start" "-a" "956e7c2333589608f1a91a9c49ed3287be2975302fdabb96b2891b8324ae9000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "956e7c2333589608f1a91a9c49ed3287be2975302fdabb96b2891b8324ae9000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "956e7c2333589608f1a91a9c49ed3287be2975302fdabb96b2891b8324ae9000", kill_on_drop: false }`
[INFO] [stdout] 956e7c2333589608f1a91a9c49ed3287be2975302fdabb96b2891b8324ae9000
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73e0420d159e9b1b3b6b8e264c169d406716c67606fbdce43646ee66bb3f116a
[INFO] running `Command { std: "docker" "start" "-a" "73e0420d159e9b1b3b6b8e264c169d406716c67606fbdce43646ee66bb3f116a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]     Checking regex-syntax v0.8.10
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]     Checking futures-sink v0.3.32
[INFO] [stderr]     Checking slab v0.4.12
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]     Checking tower-async-service v0.2.0
[INFO] [stderr]     Checking tower-async-layer v0.2.0
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking http v0.2.12
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]     Checking tower-async v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Sealed` is never used
[INFO] [stdout]    --> src/lib.rs:260:15
[INFO] [stdout]     |
[INFO] [stdout] 260 |     pub trait Sealed<T> {}
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-channel v0.3.32
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]     Checking futures-util v0.3.32
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking rand v0.10.1
[INFO] [stderr]     Checking tokio-stream v0.1.18
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking tokio-test v0.4.5
[INFO] [stderr]     Checking env_filter v1.0.1
[INFO] [stderr]     Checking env_logger v0.11.10
[INFO] [stderr]     Checking quickcheck v1.1.0
[INFO] [stderr]     Checking futures-executor v0.3.32
[INFO] [stderr]     Checking futures v0.3.32
[INFO] [stdout] error: struct `AssertSpanError` is never constructed
[INFO] [stdout]   --> tests/support.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct AssertSpanError(String);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tower-async` (test "support") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: trait `Sealed` is never used
[INFO] [stdout]    --> src/lib.rs:260:15
[INFO] [stdout]     |
[INFO] [stdout] 260 |     pub trait Sealed<T> {}
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73e0420d159e9b1b3b6b8e264c169d406716c67606fbdce43646ee66bb3f116a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73e0420d159e9b1b3b6b8e264c169d406716c67606fbdce43646ee66bb3f116a", kill_on_drop: false }`
[INFO] [stdout] 73e0420d159e9b1b3b6b8e264c169d406716c67606fbdce43646ee66bb3f116a
