Nov 30 11:47:48.945 INFO checking CGQAQ/Rust_Learn against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 30 11:47:48.945 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-3/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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"`
Nov 30 11:47:49.424 INFO [stdout] 035679e86b934d188bce0d5ccb6c572c65690a5466c2880184f04b0863e2e13f
Nov 30 11:47:49.430 INFO running `"docker" "start" "-a" "035679e86b934d188bce0d5ccb6c572c65690a5466c2880184f04b0863e2e13f"`
Nov 30 11:47:51.308 INFO [stderr] usermod: no changes
Nov 30 11:47:51.336 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Nov 30 11:47:51.336 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Nov 30 11:47:51.336 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Nov 30 11:47:51.336 INFO [stderr] files will be included as a binary target:
Nov 30 11:47:51.336 INFO [stderr] 
Nov 30 11:47:51.336 INFO [stderr] * /source/src/main.rs
Nov 30 11:47:51.336 INFO [stderr] 
Nov 30 11:47:51.337 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Nov 30 11:47:51.337 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Nov 30 11:47:51.337 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Nov 30 11:47:51.337 INFO [stderr] section. You may also move the files to a location where Cargo would not
Nov 30 11:47:51.337 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Nov 30 11:47:51.337 INFO [stderr] 
Nov 30 11:47:51.337 INFO [stderr] For more information on this warning you can consult
Nov 30 11:47:51.337 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Nov 30 11:47:51.337 INFO [stderr] warning: path `/source/src/main.rs` was erroneously implicitly accepted for binary `main`,
Nov 30 11:47:51.337 INFO [stderr] please set bin.path in Cargo.toml
Nov 30 11:47:51.376 INFO [stderr]     Checking learn v0.1.0 (/source)
Nov 30 11:47:53.524 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.524 INFO [stderr]   --> src/bin/mthread.rs:11:9
Nov 30 11:47:53.524 INFO [stderr]    |
Nov 30 11:47:53.524 INFO [stderr] 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Nov 30 11:47:53.524 INFO [stderr]    |         ----^^^
Nov 30 11:47:53.524 INFO [stderr]    |         |
Nov 30 11:47:53.524 INFO [stderr]    |         help: remove this `mut`
Nov 30 11:47:53.544 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:47:53.545 INFO [stderr] 
Nov 30 11:47:53.545 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.545 INFO [stderr]   --> src/bin/mthread.rs:27:13
Nov 30 11:47:53.545 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr] 27 |         let mut ptr = ptr.clone();
Nov 30 11:47:53.545 INFO [stderr]    |             ----^^^
Nov 30 11:47:53.545 INFO [stderr]    |             |
Nov 30 11:47:53.545 INFO [stderr]    |             help: remove this `mut`
Nov 30 11:47:53.545 INFO [stderr] 
Nov 30 11:47:53.545 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.545 INFO [stderr]   --> src/bin/mthread.rs:29:13
Nov 30 11:47:53.545 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr] 29 |         let mut tx = tx.clone();
Nov 30 11:47:53.545 INFO [stderr]    |             ----^^
Nov 30 11:47:53.545 INFO [stderr]    |             |
Nov 30 11:47:53.545 INFO [stderr]    |             help: remove this `mut`
Nov 30 11:47:53.545 INFO [stderr] 
Nov 30 11:47:53.545 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:47:53.545 INFO [stderr]   --> src/bin/mthread.rs:20:21
Nov 30 11:47:53.545 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr] 20 |                     a.send(1);
Nov 30 11:47:53.545 INFO [stderr]    |                     ^^^^^^^^^^
Nov 30 11:47:53.545 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 11:47:53.545 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:47:53.545 INFO [stderr] 
Nov 30 11:47:53.545 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:47:53.545 INFO [stderr]   --> src/bin/mthread.rs:34:17
Nov 30 11:47:53.545 INFO [stderr]    |
Nov 30 11:47:53.545 INFO [stderr] 34 |                 tx.send(d);
Nov 30 11:47:53.545 INFO [stderr]    |                 ^^^^^^^^^^^
Nov 30 11:47:53.548 INFO [stderr]    |
Nov 30 11:47:53.548 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:47:53.548 INFO [stderr] 
Nov 30 11:47:53.832 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.832 INFO [stderr]   --> src/bin/mthread.rs:11:9
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr] 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Nov 30 11:47:53.832 INFO [stderr]    |         ----^^^
Nov 30 11:47:53.832 INFO [stderr]    |         |
Nov 30 11:47:53.832 INFO [stderr]    |         help: remove this `mut`
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:47:53.832 INFO [stderr] 
Nov 30 11:47:53.832 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.832 INFO [stderr]   --> src/bin/mthread.rs:27:13
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr] 27 |         let mut ptr = ptr.clone();
Nov 30 11:47:53.832 INFO [stderr]    |             ----^^^
Nov 30 11:47:53.832 INFO [stderr]    |             |
Nov 30 11:47:53.832 INFO [stderr]    |             help: remove this `mut`
Nov 30 11:47:53.832 INFO [stderr] 
Nov 30 11:47:53.832 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:47:53.832 INFO [stderr]   --> src/bin/mthread.rs:29:13
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr] 29 |         let mut tx = tx.clone();
Nov 30 11:47:53.832 INFO [stderr]    |             ----^^
Nov 30 11:47:53.832 INFO [stderr]    |             |
Nov 30 11:47:53.832 INFO [stderr]    |             help: remove this `mut`
Nov 30 11:47:53.832 INFO [stderr] 
Nov 30 11:47:53.832 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:47:53.832 INFO [stderr]   --> src/bin/mthread.rs:20:21
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr] 20 |                     a.send(1);
Nov 30 11:47:53.832 INFO [stderr]    |                     ^^^^^^^^^^
Nov 30 11:47:53.832 INFO [stderr]    |
Nov 30 11:47:53.832 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 11:47:53.832 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:47:53.833 INFO [stderr] 
Nov 30 11:47:53.833 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:47:53.833 INFO [stderr]   --> src/bin/mthread.rs:34:17
Nov 30 11:47:53.833 INFO [stderr]    |
Nov 30 11:47:53.833 INFO [stderr] 34 |                 tx.send(d);
Nov 30 11:47:53.833 INFO [stderr]    |                 ^^^^^^^^^^^
Nov 30 11:47:53.833 INFO [stderr]    |
Nov 30 11:47:53.833 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:47:53.833 INFO [stderr] 
Nov 30 11:47:53.894 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.56s
Nov 30 11:47:53.895 INFO [stderr] su: No module specific data is present
Nov 30 11:47:54.648 INFO running `"docker" "inspect" "035679e86b934d188bce0d5ccb6c572c65690a5466c2880184f04b0863e2e13f"`
Nov 30 11:47:55.075 INFO running `"docker" "rm" "-f" "035679e86b934d188bce0d5ccb6c572c65690a5466c2880184f04b0863e2e13f"`
Nov 30 11:47:55.354 INFO [stdout] 035679e86b934d188bce0d5ccb6c572c65690a5466c2880184f04b0863e2e13f