[INFO] cloning repository https://github.com/NeoLegends/owo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NeoLegends/owo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNeoLegends%2Fowo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNeoLegends%2Fowo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c89d3d6b57628f312819ab75f99856dceadcc83a
[INFO] checking NeoLegends/owo against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNeoLegends%2Fowo" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NeoLegends/owo on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NeoLegends/owo
[INFO] finished tweaking git repo https://github.com/NeoLegends/owo
[INFO] tweaked toml for git repo https://github.com/NeoLegends/owo written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/NeoLegends/owo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded urlencoding v1.0.0
[INFO] [stderr]   Downloaded tungstenite v0.6.1
[INFO] [stderr]   Downloaded syn v0.15.34
[INFO] [stderr]   Downloaded serde v1.0.91
[INFO] [stderr]   Downloaded warp v0.1.15
[INFO] [stderr]   Downloaded input_buffer v0.2.0
[INFO] [stderr]   Downloaded headers-core v0.1.0
[INFO] [stderr]   Downloaded headers-derive v0.1.0
[INFO] [stderr]   Downloaded opaque-debug v0.2.2
[INFO] [stderr]   Downloaded headers v0.2.1
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3906cc1efb0f4d7cec11ef5efd9ff8d80c8ef9dbe679ee3399c7c55312df3fbb
[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" "3906cc1efb0f4d7cec11ef5efd9ff8d80c8ef9dbe679ee3399c7c55312df3fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3906cc1efb0f4d7cec11ef5efd9ff8d80c8ef9dbe679ee3399c7c55312df3fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3906cc1efb0f4d7cec11ef5efd9ff8d80c8ef9dbe679ee3399c7c55312df3fbb", kill_on_drop: false }`
[INFO] [stdout] 3906cc1efb0f4d7cec11ef5efd9ff8d80c8ef9dbe679ee3399c7c55312df3fbb
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0e4cbf4dd534a11c57fed24bb847fd485553fe5a14bd88e6e615f719fdb4abd
[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" "b0e4cbf4dd534a11c57fed24bb847fd485553fe5a14bd88e6e615f719fdb4abd", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]     Checking opaque-debug v0.2.2
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking urlencoding v1.0.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]     Checking block-padding v0.1.4
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking digest v0.8.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.17
[INFO] [stderr]     Checking input_buffer v0.2.0
[INFO] [stderr]     Checking tungstenite v0.6.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio v0.1.19
[INFO] [stderr]    Compiling headers-derive v0.1.0
[INFO] [stderr]     Checking h2 v0.1.18
[INFO] [stderr]     Checking headers-core v0.1.0
[INFO] [stderr]     Checking headers v0.2.1
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking hyper v0.12.28
[INFO] [stderr]     Checking warp v0.1.15
[INFO] [stdout] error[E0277]: the trait bound `!: From<()>` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:493:22
[INFO] [stdout]     |
[INFO] [stdout] 493 |                     .forward(tx.sink_map_err(|_| ()))
[INFO] [stdout]     |                      ^^^^^^^ the trait `From<()>` is not implemented for `!`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information). Consider whether you meant to use the type `()` here instead.
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `!: From<()>` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:494:22
[INFO] [stdout]     |
[INFO] [stdout] 494 |                     .map(|_| ());
[INFO] [stdout]     |                      ^^^ the trait `From<()>` is not implemented for `!`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information). Consider whether you meant to use the type `()` here instead.
[INFO] [stdout]     = note: required because of the requirements on the impl of `futures::Future` for `Forward<futures::stream::MapErr<futures::sync::mpsc::UnboundedReceiver<ws::Message>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:490:30: 492:22]>, SinkMapErr<SplitSink<ws::WebSocket>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:493:46: 493:52]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `!: From<()>` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:498:22
[INFO] [stdout]     |
[INFO] [stdout] 498 |                     .forward(rd_tx.sink_map_err(|_| ()))
[INFO] [stdout]     |                      ^^^^^^^ the trait `From<()>` is not implemented for `!`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information). Consider whether you meant to use the type `()` here instead.
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `!: From<()>` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:499:22
[INFO] [stdout]     |
[INFO] [stdout] 499 |                     .map(|_| ());
[INFO] [stdout]     |                      ^^^ the trait `From<()>` is not implemented for `!`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information). Consider whether you meant to use the type `()` here instead.
[INFO] [stdout]     = note: required because of the requirements on the impl of `futures::Future` for `Forward<futures::stream::Then<SplitStream<ws::WebSocket>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:497:27: 497:46], std::result::Result<std::result::Result<ws::Message, error::Error>, !>>, SinkMapErr<futures::sync::mpsc::UnboundedSender<std::result::Result<ws::Message, error::Error>>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:498:49: 498:55]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `!: From<()>` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:501:35
[INFO] [stdout]     |
[INFO] [stdout] 501 |                 rt.block_on(write.join(read)).expect("websocket forward");
[INFO] [stdout]     |                                   ^^^^ the trait `From<()>` is not implemented for `!`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait is implemented for `()`. Possibly this error has been caused by changes to Rust's type-inference algorithm (see issue #48950 <https://github.com/rust-lang/rust/issues/48950> for more information). Consider whether you meant to use the type `()` here instead.
[INFO] [stdout]     = note: required because of the requirements on the impl of `futures::Future` for `Forward<futures::stream::MapErr<futures::sync::mpsc::UnboundedReceiver<ws::Message>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:490:30: 492:22]>, SinkMapErr<SplitSink<ws::WebSocket>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:493:46: 493:52]>>`
[INFO] [stdout]     = note: 1 redundant requirements hidden
[INFO] [stdout]     = note: required because of the requirements on the impl of `futures::Future` for `futures::Map<Forward<futures::stream::MapErr<futures::sync::mpsc::UnboundedReceiver<ws::Message>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:490:30: 492:22]>, SinkMapErr<SplitSink<ws::WebSocket>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:493:46: 493:52]>>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/warp-0.1.15/src/test.rs:494:26: 494:32]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `warp`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b0e4cbf4dd534a11c57fed24bb847fd485553fe5a14bd88e6e615f719fdb4abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0e4cbf4dd534a11c57fed24bb847fd485553fe5a14bd88e6e615f719fdb4abd", kill_on_drop: false }`
[INFO] [stdout] b0e4cbf4dd534a11c57fed24bb847fd485553fe5a14bd88e6e615f719fdb4abd