[INFO] fetching crate heron 0.3.0...
[INFO] checking heron-0.3.0 against master#a836d9b6413d9d593be6c09463ff8c4c70e56599 for pr-84037
[INFO] extracting crate heron 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate heron 0.3.0 on toolchain a836d9b6413d9d593be6c09463ff8c4c70e56599
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate heron 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate heron 0.3.0
[INFO] tweaked toml for crates.io crate heron 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate heron 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6ac8ddf31793e56b409ebd88f6a3ceaabfc7fbcb8a0d16f69b853015d943abf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a6ac8ddf31793e56b409ebd88f6a3ceaabfc7fbcb8a0d16f69b853015d943abf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6ac8ddf31793e56b409ebd88f6a3ceaabfc7fbcb8a0d16f69b853015d943abf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ac8ddf31793e56b409ebd88f6a3ceaabfc7fbcb8a0d16f69b853015d943abf", kill_on_drop: false }`
[INFO] [stdout] a6ac8ddf31793e56b409ebd88f6a3ceaabfc7fbcb8a0d16f69b853015d943abf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "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] 57fb7c9bdc24d40fd269e66d200c46ea23e2fb4677006b3ce034a35c4edd326c
[INFO] running `Command { std: "docker" "start" "-a" "57fb7c9bdc24d40fd269e66d200c46ea23e2fb4677006b3ce034a35c4edd326c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.90
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]     Checking futures-io v0.3.13
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking vec-arena v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling anyhow v1.0.39
[INFO] [stderr]     Checking glam v0.13.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking futures-sink v0.3.13
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]     Checking futures-task v0.3.13
[INFO] [stderr]     Checking inplace_it v0.3.3
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]    Compiling cpal v0.13.2
[INFO] [stderr]    Compiling inflections v1.1.1
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]     Checking rectangle-pack v0.2.0
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling bytecount v0.6.2
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling standback v0.2.16
[INFO] [stderr]    Compiling time v0.2.26
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]     Checking safe_arch v0.5.2
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]     Checking matrixmultiply v0.3.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking ash v0.31.0
[INFO] [stderr]     Checking wgpu-types v0.6.1
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stdout] error[E0432]: unresolved import `core::task::Wake`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/standback-0.2.16/src/lib.rs:520:13
[INFO] [stdout]     |
[INFO] [stdout] 520 |     pub use core::task::Wake;
[INFO] [stdout]     |             ^^^^^^^^^^^^----
[INFO] [stdout]     |             |           |
[INFO] [stdout]     |             |           help: a similar name exists in the module (notice the capitalization): `wake`
[INFO] [stdout]     |             no `Wake` in `task`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `standback`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "57fb7c9bdc24d40fd269e66d200c46ea23e2fb4677006b3ce034a35c4edd326c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57fb7c9bdc24d40fd269e66d200c46ea23e2fb4677006b3ce034a35c4edd326c", kill_on_drop: false }`
[INFO] [stdout] 57fb7c9bdc24d40fd269e66d200c46ea23e2fb4677006b3ce034a35c4edd326c