Oct 13 05:21:28.455 INFO checking CGQAQ/Rust_Learn against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 05:21:28.455 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 05:21:29.026 INFO blam! fe9e05b79679ed958958097a179c96393e5c79616feab4b59b64d0824af616fe
Oct 13 05:21:29.027 INFO running `"docker" "start" "-a" "fe9e05b79679ed958958097a179c96393e5c79616feab4b59b64d0824af616fe"`
Oct 13 05:21:30.436 INFO kablam! usermod: no changes
Oct 13 05:21:30.472 INFO kablam! warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Oct 13 05:21:30.472 INFO kablam! disables Cargo from automatically inferring other binary targets.
Oct 13 05:21:30.472 INFO kablam! This inference behavior will change in the Rust 2018 edition and the following
Oct 13 05:21:30.472 INFO kablam! files will be included as a binary target:
Oct 13 05:21:30.472 INFO kablam! 
Oct 13 05:21:30.472 INFO kablam! * /source/src/main.rs
Oct 13 05:21:30.472 INFO kablam! 
Oct 13 05:21:30.472 INFO kablam! This is likely to break cargo build or cargo test as these files may not be
Oct 13 05:21:30.472 INFO kablam! ready to be compiled as a binary target today. You can future-proof yourself
Oct 13 05:21:30.472 INFO kablam! and disable this warning by adding `autobins = false` to your [package]
Oct 13 05:21:30.472 INFO kablam! section. You may also move the files to a location where Cargo would not
Oct 13 05:21:30.473 INFO kablam! automatically infer them to be a target, such as in subfolders.
Oct 13 05:21:30.473 INFO kablam! 
Oct 13 05:21:30.473 INFO kablam! For more information on this warning you can consult
Oct 13 05:21:30.473 INFO kablam! https://github.com/rust-lang/cargo/issues/5330
Oct 13 05:21:30.473 INFO kablam! warning: path `/source/src/main.rs` was erroneously implicitly accepted for binary `main`,
Oct 13 05:21:30.473 INFO kablam! please set bin.path in Cargo.toml
Oct 13 05:21:30.496 INFO kablam!     Checking learn v0.1.0 (/source)
Oct 13 05:21:33.148 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.148 INFO kablam!   --> src/bin/mthread.rs:11:9
Oct 13 05:21:33.148 INFO kablam!    |
Oct 13 05:21:33.148 INFO kablam! 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Oct 13 05:21:33.148 INFO kablam!    |         ----^^^
Oct 13 05:21:33.148 INFO kablam!    |         |
Oct 13 05:21:33.148 INFO kablam!    |         help: remove this `mut`
Oct 13 05:21:33.148 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 05:21:33.152 INFO kablam! 
Oct 13 05:21:33.152 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.152 INFO kablam!   --> src/bin/mthread.rs:27:13
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam! 27 |         let mut ptr = ptr.clone();
Oct 13 05:21:33.152 INFO kablam!    |             ----^^^
Oct 13 05:21:33.152 INFO kablam!    |             |
Oct 13 05:21:33.152 INFO kablam!    |             help: remove this `mut`
Oct 13 05:21:33.152 INFO kablam! 
Oct 13 05:21:33.152 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.152 INFO kablam!   --> src/bin/mthread.rs:29:13
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam! 29 |         let mut tx = tx.clone();
Oct 13 05:21:33.152 INFO kablam!    |             ----^^
Oct 13 05:21:33.152 INFO kablam!    |             |
Oct 13 05:21:33.152 INFO kablam!    |             help: remove this `mut`
Oct 13 05:21:33.152 INFO kablam! 
Oct 13 05:21:33.152 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 05:21:33.152 INFO kablam!   --> src/bin/mthread.rs:20:21
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam! 20 |                     a.send(1);
Oct 13 05:21:33.152 INFO kablam!    |                     ^^^^^^^^^^
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Oct 13 05:21:33.152 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 05:21:33.152 INFO kablam! 
Oct 13 05:21:33.152 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 05:21:33.152 INFO kablam!   --> src/bin/mthread.rs:34:17
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam! 34 |                 tx.send(d);
Oct 13 05:21:33.152 INFO kablam!    |                 ^^^^^^^^^^^
Oct 13 05:21:33.152 INFO kablam!    |
Oct 13 05:21:33.152 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 05:21:33.152 INFO kablam! 
Oct 13 05:21:33.347 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.347 INFO kablam!   --> src/bin/mthread.rs:11:9
Oct 13 05:21:33.347 INFO kablam!    |
Oct 13 05:21:33.348 INFO kablam! 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Oct 13 05:21:33.348 INFO kablam!    |         ----^^^
Oct 13 05:21:33.348 INFO kablam!    |         |
Oct 13 05:21:33.348 INFO kablam!    |         help: remove this `mut`
Oct 13 05:21:33.348 INFO kablam!    |
Oct 13 05:21:33.348 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 05:21:33.348 INFO kablam! 
Oct 13 05:21:33.352 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.353 INFO kablam!   --> src/bin/mthread.rs:27:13
Oct 13 05:21:33.353 INFO kablam!    |
Oct 13 05:21:33.353 INFO kablam! 27 |         let mut ptr = ptr.clone();
Oct 13 05:21:33.353 INFO kablam!    |             ----^^^
Oct 13 05:21:33.353 INFO kablam!    |             |
Oct 13 05:21:33.353 INFO kablam!    |             help: remove this `mut`
Oct 13 05:21:33.353 INFO kablam! 
Oct 13 05:21:33.353 INFO kablam! warning: variable does not need to be mutable
Oct 13 05:21:33.353 INFO kablam!   --> src/bin/mthread.rs:29:13
Oct 13 05:21:33.353 INFO kablam!    |
Oct 13 05:21:33.353 INFO kablam! 29 |         let mut tx = tx.clone();
Oct 13 05:21:33.353 INFO kablam!    |             ----^^
Oct 13 05:21:33.353 INFO kablam!    |             |
Oct 13 05:21:33.353 INFO kablam!    |             help: remove this `mut`
Oct 13 05:21:33.353 INFO kablam! 
Oct 13 05:21:33.353 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 05:21:33.353 INFO kablam!   --> src/bin/mthread.rs:20:21
Oct 13 05:21:33.353 INFO kablam!    |
Oct 13 05:21:33.354 INFO kablam! 20 |                     a.send(1);
Oct 13 05:21:33.354 INFO kablam!    |                     ^^^^^^^^^^
Oct 13 05:21:33.354 INFO kablam!    |
Oct 13 05:21:33.354 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Oct 13 05:21:33.354 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 05:21:33.354 INFO kablam! 
Oct 13 05:21:33.354 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 05:21:33.354 INFO kablam!   --> src/bin/mthread.rs:34:17
Oct 13 05:21:33.354 INFO kablam!    |
Oct 13 05:21:33.354 INFO kablam! 34 |                 tx.send(d);
Oct 13 05:21:33.354 INFO kablam!    |                 ^^^^^^^^^^^
Oct 13 05:21:33.354 INFO kablam!    |
Oct 13 05:21:33.354 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 05:21:33.354 INFO kablam! 
Oct 13 05:21:33.661 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.20s
Oct 13 05:21:33.675 INFO kablam! su: No module specific data is present
Oct 13 05:21:34.502 INFO running `"docker" "rm" "-f" "fe9e05b79679ed958958097a179c96393e5c79616feab4b59b64d0824af616fe"`
Oct 13 05:21:34.792 INFO blam! fe9e05b79679ed958958097a179c96393e5c79616feab4b59b64d0824af616fe