Dec 04 23:58:14.652 INFO checking Swoorup/rtasks against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 23:58:14.652 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 23:58:15.019 INFO [stdout] 4756b92658369dd286042ce0ac43eca347eda4e4031513a292508fa785eaf97b
Dec 04 23:58:15.027 INFO running `"docker" "start" "-a" "4756b92658369dd286042ce0ac43eca347eda4e4031513a292508fa785eaf97b"`
Dec 04 23:58:16.911 INFO [stderr] usermod: no changes
Dec 04 23:58:17.216 INFO [stderr]     Checking futures v0.1.25
Dec 04 23:58:20.279 INFO [stderr]     Checking tokio-io v0.1.9
Dec 04 23:58:20.279 INFO [stderr]     Checking tokio-executor v0.1.5
Dec 04 23:58:20.279 INFO [stderr]     Checking futures-cpupool v0.1.8
Dec 04 23:58:20.279 INFO [stderr]     Checking want v0.0.6
Dec 04 23:58:21.627 INFO [stderr]     Checking tokio-threadpool v0.1.7
Dec 04 23:58:21.627 INFO [stderr]     Checking tokio-current-thread v0.1.3
Dec 04 23:58:21.627 INFO [stderr]     Checking tokio-timer v0.2.7
Dec 04 23:58:23.819 INFO [stderr]     Checking tokio-codec v0.1.1
Dec 04 23:58:23.819 INFO [stderr]     Checking tokio-reactor v0.1.6
Dec 04 23:58:23.819 INFO [stderr]     Checking tokio-async-await v0.1.4
Dec 04 23:58:23.819 INFO [stderr]     Checking h2 v0.1.12
Dec 04 23:58:25.907 INFO [stderr]     Checking tokio-fs v0.1.3
Dec 04 23:58:26.795 INFO [stderr]     Checking tokio-tcp v0.1.2
Dec 04 23:58:26.795 INFO [stderr]     Checking tokio-uds v0.2.2
Dec 04 23:58:26.795 INFO [stderr]     Checking tokio-udp v0.1.2
Dec 04 23:58:30.651 INFO [stderr]     Checking tokio v0.1.11
Dec 04 23:58:32.863 INFO [stderr]     Checking hyper v0.12.11
Dec 04 23:58:38.492 INFO [stderr]     Checking ctr_test v0.1.0 (/source)
Dec 04 23:58:54.291 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 23:58:54.291 INFO [stderr]   --> src/chat.rs:64:13
Dec 04 23:58:54.291 INFO [stderr]    |
Dec 04 23:58:54.292 INFO [stderr] 64 |             await!(lines_tx.send_async(line));
Dec 04 23:58:54.292 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:58:54.293 INFO [stderr]    |
Dec 04 23:58:54.293 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 23:58:54.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 23:58:54.294 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 04 23:58:54.294 INFO [stderr] 
Dec 04 23:58:54.419 INFO [stderr] warning: unreachable expression
Dec 04 23:58:54.419 INFO [stderr]   --> src/echo_client.rs:43:5
Dec 04 23:58:54.420 INFO [stderr]    |
Dec 04 23:58:54.420 INFO [stderr] 43 |     Ok(())
Dec 04 23:58:54.420 INFO [stderr]    |     ^^^^^^
Dec 04 23:58:54.427 INFO [stderr]    |
Dec 04 23:58:54.427 INFO [stderr]    = note: #[warn(unreachable_code)] on by default
Dec 04 23:58:54.427 INFO [stderr] 
Dec 04 23:58:54.550 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:58:54.550 INFO [stderr]   --> src/echo_client.rs:30:13
Dec 04 23:58:54.550 INFO [stderr]    |
Dec 04 23:58:54.550 INFO [stderr] 30 |         let mut input = input.replace("\n", "\0");
Dec 04 23:58:54.550 INFO [stderr]    |             ----^^^^^
Dec 04 23:58:54.550 INFO [stderr]    |             |
Dec 04 23:58:54.550 INFO [stderr]    |             help: remove this `mut`
Dec 04 23:58:54.567 INFO [stderr]    |
Dec 04 23:58:54.567 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:58:54.567 INFO [stderr] 
Dec 04 23:58:54.673 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 23:58:54.673 INFO [stderr]   --> src/chat.rs:64:13
Dec 04 23:58:54.673 INFO [stderr]    |
Dec 04 23:58:54.673 INFO [stderr] 64 |             await!(lines_tx.send_async(line));
Dec 04 23:58:54.673 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:58:54.673 INFO [stderr]    |
Dec 04 23:58:54.673 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 23:58:54.673 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 23:58:54.673 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 04 23:58:54.673 INFO [stderr] 
Dec 04 23:58:54.961 INFO [stderr] warning: unreachable expression
Dec 04 23:58:54.961 INFO [stderr]   --> src/echo_client.rs:43:5
Dec 04 23:58:54.961 INFO [stderr]    |
Dec 04 23:58:54.961 INFO [stderr] 43 |     Ok(())
Dec 04 23:58:54.961 INFO [stderr]    |     ^^^^^^
Dec 04 23:58:54.979 INFO [stderr]    |
Dec 04 23:58:54.979 INFO [stderr]    = note: #[warn(unreachable_code)] on by default
Dec 04 23:58:54.979 INFO [stderr] 
Dec 04 23:58:55.056 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:58:55.056 INFO [stderr]   --> src/echo_client.rs:30:13
Dec 04 23:58:55.056 INFO [stderr]    |
Dec 04 23:58:55.056 INFO [stderr] 30 |         let mut input = input.replace("\n", "\0");
Dec 04 23:58:55.056 INFO [stderr]    |             ----^^^^^
Dec 04 23:58:55.056 INFO [stderr]    |             |
Dec 04 23:58:55.056 INFO [stderr]    |             help: remove this `mut`
Dec 04 23:58:55.056 INFO [stderr]    |
Dec 04 23:58:55.056 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:58:55.056 INFO [stderr] 
Dec 04 23:58:55.775 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.84s
Dec 04 23:58:55.784 INFO [stderr] su: No module specific data is present
Dec 04 23:58:57.456 INFO running `"docker" "inspect" "4756b92658369dd286042ce0ac43eca347eda4e4031513a292508fa785eaf97b"`
Dec 04 23:58:57.681 INFO running `"docker" "rm" "-f" "4756b92658369dd286042ce0ac43eca347eda4e4031513a292508fa785eaf97b"`
Dec 04 23:58:58.127 INFO [stdout] 4756b92658369dd286042ce0ac43eca347eda4e4031513a292508fa785eaf97b