[INFO] fetching crate heph 0.3.1...
[INFO] testing heph-0.3.1 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate heph 0.3.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate heph 0.3.1 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate heph 0.3.1
[INFO] finished tweaking crates.io crate heph 0.3.1
[INFO] tweaked toml for crates.io crate heph 0.3.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate heph 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b59312faf84df854edfca8d5ea72e0e6b085bc789b825ac2b144526aba9e3bd9
[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" "b59312faf84df854edfca8d5ea72e0e6b085bc789b825ac2b144526aba9e3bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b59312faf84df854edfca8d5ea72e0e6b085bc789b825ac2b144526aba9e3bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b59312faf84df854edfca8d5ea72e0e6b085bc789b825ac2b144526aba9e3bd9", kill_on_drop: false }`
[INFO] [stdout] b59312faf84df854edfca8d5ea72e0e6b085bc789b825ac2b144526aba9e3bd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a7baf5b5558053dd33561163c1c765db457b93439fac2b170ae590a1f6138c9
[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" "4a7baf5b5558053dd33561163c1c765db457b93439fac2b170ae590a1f6138c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling sval v1.0.0-alpha.5
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling socket2 v0.4.1
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling heph-inbox v0.2.2
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling mio-signals v0.1.5
[INFO] [stderr]    Compiling heph v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `available_concurrency` in module `thread`
[INFO] [stdout]   --> src/rt/setup.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let n = match thread::available_concurrency() {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^ not found in `thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Missing required bounds on Bufs
[INFO] [stdout]    --> src/net/mod.rs:419:5
[INFO] [stdout]     |
[INFO] [stdout] 419 |     type Bufs<'b>: AsMut<[MaybeUninitSlice<'b>]>;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 help: add the required where clauses: `where Self: 'b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `heph` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "4a7baf5b5558053dd33561163c1c765db457b93439fac2b170ae590a1f6138c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a7baf5b5558053dd33561163c1c765db457b93439fac2b170ae590a1f6138c9", kill_on_drop: false }`
[INFO] [stdout] 4a7baf5b5558053dd33561163c1c765db457b93439fac2b170ae590a1f6138c9