[INFO] fetching crate h2 0.3.3...
[INFO] checking h2-0.3.3 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate h2 0.3.3 into /workspace/builds/worker-68/source
[INFO] validating manifest of crates.io crate h2 0.3.3 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate h2 0.3.3
[INFO] finished tweaking crates.io crate h2 0.3.3
[INFO] tweaked toml for crates.io crate h2 0.3.3 written to /workspace/builds/worker-68/source/Cargo.toml
[INFO] crate crates.io crate h2 0.3.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 44b24cfba88b970e2c029597124bea911bb8c180b433958d1e07b634d6bf900c
[INFO] running `Command { std: "docker" "start" "-a" "44b24cfba88b970e2c029597124bea911bb8c180b433958d1e07b634d6bf900c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44b24cfba88b970e2c029597124bea911bb8c180b433958d1e07b634d6bf900c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44b24cfba88b970e2c029597124bea911bb8c180b433958d1e07b634d6bf900c", kill_on_drop: false }`
[INFO] [stdout] 44b24cfba88b970e2c029597124bea911bb8c180b433958d1e07b634d6bf900c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8687c534b764c46280c45e2c0f422a6a258902388a18d97bad8aa2e67a770e2e
[INFO] running `Command { std: "docker" "start" "-a" "8687c534b764c46280c45e2c0f422a6a258902388a18d97bad8aa2e67a770e2e", 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]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking same-file v0.1.3
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking walkdir v1.0.7
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking quickcheck v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]     Checking tokio-util v0.6.6
[INFO] [stderr]     Checking tokio-rustls v0.22.0
[INFO] [stderr]     Checking h2 v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]   --> src/frame/mod.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[macro_escape]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused attribute
[INFO] [stdout]   --> src/frame/mod.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[macro_escape]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:83:24
[INFO] [stdout]    |
[INFO] [stdout] 83 | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_attributes)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `h2` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8687c534b764c46280c45e2c0f422a6a258902388a18d97bad8aa2e67a770e2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8687c534b764c46280c45e2c0f422a6a258902388a18d97bad8aa2e67a770e2e", kill_on_drop: false }`
[INFO] [stdout] 8687c534b764c46280c45e2c0f422a6a258902388a18d97bad8aa2e67a770e2e