[INFO] updating cached repository alexxuyang/tokio-examples
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexxuyang/tokio-examples
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexxuyang/tokio-examples" "work/ex/beta-1.37-6/sources/1.36.0/gh/alexxuyang/tokio-examples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/alexxuyang/tokio-examples'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexxuyang/tokio-examples" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 38774c6c9eea4dbdc17b6877adb17fa7278e3405
[INFO] sha for GitHub repo alexxuyang/tokio-examples: 38774c6c9eea4dbdc17b6877adb17fa7278e3405
[INFO] validating manifest of alexxuyang/tokio-examples on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alexxuyang/tokio-examples on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alexxuyang/tokio-examples
[INFO] finished frobbing alexxuyang/tokio-examples
[INFO] frobbed toml for alexxuyang/tokio-examples written to work/ex/beta-1.37-6/sources/1.36.0/gh/alexxuyang/tokio-examples/Cargo.toml
[INFO] started frobbing alexxuyang/tokio-examples
[INFO] finished frobbing alexxuyang/tokio-examples
[INFO] frobbed toml for alexxuyang/tokio-examples written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples/Cargo.toml
[INFO] crate alexxuyang/tokio-examples already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing alexxuyang/tokio-examples against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] f003e7c15313e121cca8887f91aec1ace45666f98a1302358631829fa28a5880
[INFO] running `"docker" "start" "-a" "f003e7c15313e121cca8887f91aec1ace45666f98a1302358631829fa28a5880"`
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.19
[INFO] [stderr]    Compiling tokio-examples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.01s
[INFO] running `"docker" "inspect" "f003e7c15313e121cca8887f91aec1ace45666f98a1302358631829fa28a5880"`
[INFO] running `"docker" "rm" "-f" "f003e7c15313e121cca8887f91aec1ace45666f98a1302358631829fa28a5880"`
[INFO] [stdout] f003e7c15313e121cca8887f91aec1ace45666f98a1302358631829fa28a5880
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3daab5c52e4693bd3bd277e3c9b69ad5e9d18afca5cdfe0443cb149803453389
[INFO] running `"docker" "start" "-a" "3daab5c52e4693bd3bd277e3c9b69ad5e9d18afca5cdfe0443cb149803453389"`
[INFO] [stderr]    Compiling tokio-examples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/timeout.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> examples/then.rs:9:37
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn simple_func() -> Result<u32, Box<Error>> {
[INFO] [stderr]   |                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> examples/peeraddr.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/peeraddr.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/stream.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/fold.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut dst = vec![];
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> examples/lazy2.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::timer::Delay`
[INFO] [stderr]  --> examples/lazy2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::timer::Delay;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Duration`, `Instant`
[INFO] [stderr]  --> examples/lazy2.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::time::{Duration, Instant};
[INFO] [stderr]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Add`
[INFO] [stderr]   --> examples/lazy2.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::ops::Add;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::Stream`
[INFO] [stderr]  --> examples/lazy2.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::Stream;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `future`
[INFO] [stderr]  --> examples/writebuf.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::{Future, future};
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/writebuf.rs:34:25
[INFO] [stderr]    |
[INFO] [stderr] 34 |                         socket.write_buf(data);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> examples/select.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/andthen2.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/stream2.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::Future`
[INFO] [stderr]  --> examples/stream2.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use futures::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> examples/andthen2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/delay.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> examples/delay.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/andthen3.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/map.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> examples/map.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> examples/map.rs:16:25
[INFO] [stderr]    |
[INFO] [stderr] 16 |         Ok(Async::Ready((String::from("hello world!"))))
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> examples/andthen3.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `socket`
[INFO] [stderr]   --> examples/andthen3.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 |         .and_then(|(socket, buf)| {
[INFO] [stderr]    |                     ^^^^^^ help: consider prefixing with an underscore: `_socket`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/tryready2.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> examples/tryready2.rs:17:25
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Ok(Async::Ready((String::from("hello world!"))))
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> examples/andthen1.rs:7:37
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn simple_func() -> Result<u32, Box<Error>> {
[INFO] [stderr]   |                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future`
[INFO] [stderr]  --> examples/tryready1.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> examples/tryready1.rs:16:25
[INFO] [stderr]    |
[INFO] [stderr] 16 |         Ok(Async::Ready((String::from("hello world!"))))
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.79s
[INFO] running `"docker" "inspect" "3daab5c52e4693bd3bd277e3c9b69ad5e9d18afca5cdfe0443cb149803453389"`
[INFO] running `"docker" "rm" "-f" "3daab5c52e4693bd3bd277e3c9b69ad5e9d18afca5cdfe0443cb149803453389"`
[INFO] [stdout] 3daab5c52e4693bd3bd277e3c9b69ad5e9d18afca5cdfe0443cb149803453389
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexxuyang/tokio-examples:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 8220f476ebdd253f543ac1be47e72f18d436fe3b91ffaf6622eb0da47a2e7180
[INFO] running `"docker" "start" "-a" "8220f476ebdd253f543ac1be47e72f18d436fe3b91ffaf6622eb0da47a2e7180"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tokio_examples-27f2914fb11453a4
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8220f476ebdd253f543ac1be47e72f18d436fe3b91ffaf6622eb0da47a2e7180"`
[INFO] running `"docker" "rm" "-f" "8220f476ebdd253f543ac1be47e72f18d436fe3b91ffaf6622eb0da47a2e7180"`
[INFO] [stdout] 8220f476ebdd253f543ac1be47e72f18d436fe3b91ffaf6622eb0da47a2e7180