[INFO] fetching crate howto 0.3.1...
[INFO] checking howto-0.3.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate howto 0.3.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate howto 0.3.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate howto 0.3.1
[INFO] finished tweaking crates.io crate howto 0.3.1
[INFO] tweaked toml for crates.io crate howto 0.3.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8f934fd618fb785c9d1b0c99adfea765a1d5c8af03b511b5e5999131f9028d3e
[INFO] running `"docker" "start" "-a" "8f934fd618fb785c9d1b0c99adfea765a1d5c8af03b511b5e5999131f9028d3e"`
[INFO] [stderr]    Compiling isahc v0.7.4
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]     Checking selectors v0.21.0
[INFO] [stderr]     Checking sluice v0.4.2
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking html5ever v0.22.5
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking surf v1.0.2
[INFO] [stderr] error[E0277]: the trait bound `std::io::Empty: futures_io::if_std::AsyncRead` is not satisfied
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/surf-1.0.2/src/http_client/mod.rs:64:21
[INFO] [stderr]    |
[INFO] [stderr] 64 |             reader: Box::new(std::io::empty()),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `futures_io::if_std::AsyncRead` is not implemented for `std::io::Empty`
[INFO] [stderr]    |
[INFO] [stderr]    = note: required for the cast to the object type `dyn futures_io::if_std::AsyncRead + std::marker::Send + std::marker::Unpin`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `surf`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8f934fd618fb785c9d1b0c99adfea765a1d5c8af03b511b5e5999131f9028d3e"`
[INFO] running `"docker" "rm" "-f" "8f934fd618fb785c9d1b0c99adfea765a1d5c8af03b511b5e5999131f9028d3e"`
[INFO] [stdout] 8f934fd618fb785c9d1b0c99adfea765a1d5c8af03b511b5e5999131f9028d3e