[INFO] fetching crate futures_ringbuf 0.2.1...
[INFO] checking futures_ringbuf-0.2.1 against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] extracting crate futures_ringbuf 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate futures_ringbuf 0.2.1 on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures_ringbuf 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate futures_ringbuf 0.2.1
[INFO] tweaked toml for crates.io crate futures_ringbuf 0.2.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate futures_ringbuf 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.10
[INFO] [stderr]   Downloaded ctor v0.1.13
[INFO] [stderr]   Downloaded ringbuf v0.2.1
[INFO] [stderr]   Downloaded ergo-pin v0.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.10
[INFO] [stderr]   Downloaded futures-test v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f0529f676116e4f06c2c2f5033bc081e3f9abac3c403ea806ace8638126779ba
[INFO] running `Command { std: "docker" "start" "-a" "f0529f676116e4f06c2c2f5033bc081e3f9abac3c403ea806ace8638126779ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0529f676116e4f06c2c2f5033bc081e3f9abac3c403ea806ace8638126779ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0529f676116e4f06c2c2f5033bc081e3f9abac3c403ea806ace8638126779ba", kill_on_drop: false }`
[INFO] [stdout] f0529f676116e4f06c2c2f5033bc081e3f9abac3c403ea806ace8638126779ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 063fda9c1d05746c4439aedd4f765db77924f3500f2e1660fafd74306d1ec199
[INFO] running `Command { std: "docker" "start" "-a" "063fda9c1d05746c4439aedd4f765db77924f3500f2e1660fafd74306d1ec199", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking ringbuf v0.2.1
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]     Checking tokio v0.2.18
[INFO] [stderr]    Compiling futures_ringbuf v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.9
[INFO] [stderr]    Compiling ergo-pin v0.1.0
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking pin-project v0.4.9
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking futures-test v0.3.4
[INFO] [stderr]     Checking futures_codec v0.4.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.85s
[INFO] running `Command { std: "docker" "inspect" "063fda9c1d05746c4439aedd4f765db77924f3500f2e1660fafd74306d1ec199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "063fda9c1d05746c4439aedd4f765db77924f3500f2e1660fafd74306d1ec199", kill_on_drop: false }`
[INFO] [stdout] 063fda9c1d05746c4439aedd4f765db77924f3500f2e1660fafd74306d1ec199