[INFO] fetching crate and-then-concurrent 0.1.0...
[INFO] checking and-then-concurrent-0.1.0 against master#17ffbc81a30c094193836a5d7f90dff273b5df93 for pr-138785
[INFO] extracting crate and-then-concurrent 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate and-then-concurrent 0.1.0 on toolchain 17ffbc81a30c094193836a5d7f90dff273b5df93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate and-then-concurrent 0.1.0
[INFO] finished tweaking crates.io crate and-then-concurrent 0.1.0
[INFO] tweaked toml for crates.io crate and-then-concurrent 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 40 packages to latest compatible versions
[INFO] [stderr]       Adding tokio v0.3.7 (available: v1.44.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "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] 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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b801e1041890a819b83ba366e640342dd7cf3fcc7759a2b6e5de6e9940c5968a
[INFO] running `Command { std: "docker" "start" "-a" "b801e1041890a819b83ba366e640342dd7cf3fcc7759a2b6e5de6e9940c5968a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b801e1041890a819b83ba366e640342dd7cf3fcc7759a2b6e5de6e9940c5968a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b801e1041890a819b83ba366e640342dd7cf3fcc7759a2b6e5de6e9940c5968a", kill_on_drop: false }`
[INFO] [stdout] b801e1041890a819b83ba366e640342dd7cf3fcc7759a2b6e5de6e9940c5968a
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3921a5c4d2914bd8e953760a94e7fc0b783eac46f6156ec32ad1a791c7d7cb16
[INFO] running `Command { std: "docker" "start" "-a" "3921a5c4d2914bd8e953760a94e7fc0b783eac46f6156ec32ad1a791c7d7cb16", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking instant v0.1.13
[INFO] [stderr]     Checking smallvec v1.15.0
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling tokio-macros v0.3.2
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking pin-project v1.1.10
[INFO] [stderr]     Checking and-then-concurrent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.96s
[INFO] running `Command { std: "docker" "inspect" "3921a5c4d2914bd8e953760a94e7fc0b783eac46f6156ec32ad1a791c7d7cb16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3921a5c4d2914bd8e953760a94e7fc0b783eac46f6156ec32ad1a791c7d7cb16", kill_on_drop: false }`
[INFO] [stdout] 3921a5c4d2914bd8e953760a94e7fc0b783eac46f6156ec32ad1a791c7d7cb16