[INFO] cloning repository https://github.com/sabahtalateh/tokio_chat_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sabahtalateh/tokio_chat_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Ftokio_chat_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Ftokio_chat_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd3ac82fc35f7d0197021598b8b47ade28c53ad6
[INFO] checking sabahtalateh/tokio_chat_server against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Ftokio_chat_server" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sabahtalateh/tokio_chat_server on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sabahtalateh/tokio_chat_server
[INFO] finished tweaking git repo https://github.com/sabahtalateh/tokio_chat_server
[INFO] tweaked toml for git repo https://github.com/sabahtalateh/tokio_chat_server written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sabahtalateh/tokio_chat_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking sabahtalateh/tokio_chat_server against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Ftokio_chat_server" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sabahtalateh/tokio_chat_server on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sabahtalateh/tokio_chat_server
[INFO] finished tweaking git repo https://github.com/sabahtalateh/tokio_chat_server
[INFO] tweaked toml for git repo https://github.com/sabahtalateh/tokio_chat_server written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sabahtalateh/tokio_chat_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16b91836f2407cb040566a2d1940423fc6ee810cb29b7208c8b9f490ff5ba1b8
[INFO] running `Command { std: "docker" "start" "-a" "16b91836f2407cb040566a2d1940423fc6ee810cb29b7208c8b9f490ff5ba1b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16b91836f2407cb040566a2d1940423fc6ee810cb29b7208c8b9f490ff5ba1b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16b91836f2407cb040566a2d1940423fc6ee810cb29b7208c8b9f490ff5ba1b8", kill_on_drop: false }`
[INFO] [stdout] 16b91836f2407cb040566a2d1940423fc6ee810cb29b7208c8b9f490ff5ba1b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37a15b69f2998f30c025ddd106262160dcf067bc70b0575eed148e27447fb8e4
[INFO] running `Command { std: "docker" "start" "-a" "37a15b69f2998f30c025ddd106262160dcf067bc70b0575eed148e27447fb8e4", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.28
[INFO] [stderr]     Checking tokio_chat_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     /// Implicit types declarations in this file can be omitted
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 45 |     let my_fut: MyFut = MyFut::new();
[INFO] [stdout]    |     --------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |       /// Function to use in `AndThen` combinator
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 48 | /     let f: fn(i32) -> Result<i32, ()> = |val| {
[INFO] [stdout] 49 | |         println!("done");
[INFO] [stdout] 50 | |         Ok(val - 100)
[INFO] [stdout] 51 | |     };
[INFO] [stdout]    | |______- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | /     /// `AndThen` type returned by `.and_then(closure)` combinator
[INFO] [stdout] 54 | |     /// implements `Future` too so it can be used as regular future
[INFO] [stdout] 55 | |     ///
[INFO] [stdout] 56 | |     /// First generic type parameter is `MyFut` - future that will be polled first
[INFO] [stdout] ...  |
[INFO] [stdout] 62 | |     /// Third is a function that will be applied to the `MyFut` result
[INFO] [stdout] 63 | |     /// It's return type should be the same as second type parameter
[INFO] [stdout]    | |____________________________________________________________________^
[INFO] [stdout] 64 |       let my_fut: AndThen<MyFut, Result<i32, ()>, fn(i32) -> Result<i32, ()>> = my_fut.and_then(f);
[INFO] [stdout]    |       --------------------------------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 | /     /// `Map` type parameterized with 2 args
[INFO] [stdout] 67 | |     ///
[INFO] [stdout] 68 | |     /// First one `AndThen<MyFut, Result<i32, ()>, fn(i32) -> Result<i32, ()>>` is a `Future` to map
[INFO] [stdout] 69 | |     ///
[INFO] [stdout] ...  |
[INFO] [stdout] 74 | |     /// for map because semantics of `AndThen` is to run another future once the previous one completes
[INFO] [stdout] 75 | |     /// and the semantics of `Map` is to map the result of the future from one value to another
[INFO] [stdout]    | |_______________________________________________________________________________________________^
[INFO] [stdout] 76 | /     let my_fut : Map<AndThen<MyFut, Result<i32, ()>, fn(i32) -> Result<i32, ()>>, fn(i32)-> i32>= my_fut.map(|x| {
[INFO] [stdout] 77 | |         x + 1000
[INFO] [stdout] 78 | |     });
[INFO] [stdout]    | |_______- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | /     /// Futures should be run onto an executor
[INFO] [stdout] 81 | |     ///
[INFO] [stdout] 82 | |     /// Later we will consider tokio executor instead of
[INFO] [stdout] 83 | |     /// one provided by the future trait
[INFO] [stdout]    | |________________________________________^
[INFO] [stdout] 84 |       let mut s = spawn(my_fut);
[INFO] [stdout]    |       -------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/future.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     /// Wait for the outer future `Map` which will poll `AndThen`  which in turn will poll `MyFut`
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 87 |     let r = s.wait_future();
[INFO] [stdout]    |     ------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `tokio_chat_server`
[INFO] [stdout]  --> src/main.rs:1:2
[INFO] [stdout]   |
[INFO] [stdout] 1 |
[INFO] [stdout]   |  ^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio_chat_server` (bin "tokio_chat_server") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "37a15b69f2998f30c025ddd106262160dcf067bc70b0575eed148e27447fb8e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37a15b69f2998f30c025ddd106262160dcf067bc70b0575eed148e27447fb8e4", kill_on_drop: false }`
[INFO] [stdout] 37a15b69f2998f30c025ddd106262160dcf067bc70b0575eed148e27447fb8e4
