[INFO] fetching crate futures_ringbuf 0.3.1...
[INFO] checking futures_ringbuf-0.3.1 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate futures_ringbuf 0.3.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate futures_ringbuf 0.3.1 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures_ringbuf 0.3.1
[INFO] finished tweaking crates.io crate futures_ringbuf 0.3.1
[INFO] tweaked toml for crates.io crate futures_ringbuf 0.3.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate futures_ringbuf 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-test v0.3.15
[INFO] [stderr]   Downloaded asynchronous-codec v0.6.0
[INFO] [stderr]   Downloaded log-derive v0.4.1
[INFO] [stderr]   Downloaded ergo-pin v0.1.0
[INFO] [stderr]   Downloaded ringbuf v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fa2b4f80f72633541a146bb81fab9b4b66a3366869b88f5e81582d88750a3a1
[INFO] running `Command { std: "docker" "start" "-a" "7fa2b4f80f72633541a146bb81fab9b4b66a3366869b88f5e81582d88750a3a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fa2b4f80f72633541a146bb81fab9b4b66a3366869b88f5e81582d88750a3a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fa2b4f80f72633541a146bb81fab9b4b66a3366869b88f5e81582d88750a3a1", kill_on_drop: false }`
[INFO] [stdout] 7fa2b4f80f72633541a146bb81fab9b4b66a3366869b88f5e81582d88750a3a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56904228d4f33687c55d8d04b6950b584698113bdb5da2aac00e24d2cffcf9da
[INFO] running `Command { std: "docker" "start" "-a" "56904228d4f33687c55d8d04b6950b584698113bdb5da2aac00e24d2cffcf9da", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling libc v0.2.96
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]     Checking ringbuf v0.2.5
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]    Compiling futures_ringbuf v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling ergo-pin v0.1.0
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling log-derive v0.4.1
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking asynchronous-codec v0.6.0
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking futures-test v0.3.15
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.75s
[INFO] running `Command { std: "docker" "inspect" "56904228d4f33687c55d8d04b6950b584698113bdb5da2aac00e24d2cffcf9da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56904228d4f33687c55d8d04b6950b584698113bdb5da2aac00e24d2cffcf9da", kill_on_drop: false }`
[INFO] [stdout] 56904228d4f33687c55d8d04b6950b584698113bdb5da2aac00e24d2cffcf9da