[INFO] fetching crate craftping 0.2.1...
[INFO] checking craftping-0.2.1 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate craftping 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate craftping 0.2.1 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate craftping 0.2.1
[INFO] finished tweaking crates.io crate craftping 0.2.1
[INFO] tweaked toml for crates.io crate craftping 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate craftping 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2493446b339b22b70ed8e7457de1cdb092a02bcbb32b40247c9afa202c3de616
[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" "2493446b339b22b70ed8e7457de1cdb092a02bcbb32b40247c9afa202c3de616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2493446b339b22b70ed8e7457de1cdb092a02bcbb32b40247c9afa202c3de616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2493446b339b22b70ed8e7457de1cdb092a02bcbb32b40247c9afa202c3de616", kill_on_drop: false }`
[INFO] [stdout] 2493446b339b22b70ed8e7457de1cdb092a02bcbb32b40247c9afa202c3de616
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 924fd16ba1a2dffd43617e022abbcccb2ab40a87f8b9a91d03cce6275b8c9348
[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" "924fd16ba1a2dffd43617e022abbcccb2ab40a87f8b9a91d03cce6275b8c9348", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.119
[INFO] [stderr]     Checking futures-sink v0.3.12
[INFO] [stderr]    Compiling serde v1.0.119
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]    Compiling tokio v1.0.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]    Compiling futures-macro v0.3.12
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stderr]     Checking craftping v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `craftping::tokio`
[INFO] [stdout]  --> examples/tokio.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use craftping::tokio::ping;
[INFO] [stdout]   |                ^^^^^ could not find `tokio` in `craftping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0698]: type inside `async` block must be known in this context
[INFO] [stdout]  --> examples/tokio.rs:7:37
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let response = ping(server, 25565).await?;
[INFO] [stdout]   |                                     ^^^^^ cannot infer type for type `{integer}`
[INFO] [stdout]   |
[INFO] [stdout] note: the type is part of the `async` block because of this `await`
[INFO] [stdout]  --> examples/tokio.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let response = ping(server, 25565).await?;
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0698.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `craftping`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "924fd16ba1a2dffd43617e022abbcccb2ab40a87f8b9a91d03cce6275b8c9348", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "924fd16ba1a2dffd43617e022abbcccb2ab40a87f8b9a91d03cce6275b8c9348", kill_on_drop: false }`
[INFO] [stdout] 924fd16ba1a2dffd43617e022abbcccb2ab40a87f8b9a91d03cce6275b8c9348