Dec 06 15:12:58.818 INFO testing CGQAQ/Rust_Learn against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 15:12:58.818 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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 06 15:12:58.985 INFO [stdout] 8d6e1dcf7f536c906f373de3eb02510c70c7ecff552dd4973ea92aa8228a7f0a
Dec 06 15:12:58.990 INFO running `"docker" "start" "-a" "8d6e1dcf7f536c906f373de3eb02510c70c7ecff552dd4973ea92aa8228a7f0a"`
Dec 06 15:12:59.332 INFO [stderr] usermod: no changes
Dec 06 15:12:59.351 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Dec 06 15:12:59.351 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Dec 06 15:12:59.351 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Dec 06 15:12:59.351 INFO [stderr] files will be included as a binary target:
Dec 06 15:12:59.351 INFO [stderr] 
Dec 06 15:12:59.351 INFO [stderr] * /source/src/main.rs
Dec 06 15:12:59.351 INFO [stderr] 
Dec 06 15:12:59.351 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Dec 06 15:12:59.351 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Dec 06 15:12:59.351 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Dec 06 15:12:59.351 INFO [stderr] section. You may also move the files to a location where Cargo would not
Dec 06 15:12:59.351 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Dec 06 15:12:59.351 INFO [stderr] 
Dec 06 15:12:59.352 INFO [stderr] For more information on this warning you can consult
Dec 06 15:12:59.352 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Dec 06 15:12:59.352 INFO [stderr] warning: path `/source/src/main.rs` was erroneously implicitly accepted for binary `main`,
Dec 06 15:12:59.352 INFO [stderr] please set bin.path in Cargo.toml
Dec 06 15:12:59.354 INFO [stderr]    Compiling learn v0.1.0 (/source)
Dec 06 15:12:59.773 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:12:59.773 INFO [stderr]   --> src/bin/mthread.rs:11:9
Dec 06 15:12:59.773 INFO [stderr]    |
Dec 06 15:12:59.773 INFO [stderr] 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Dec 06 15:12:59.773 INFO [stderr]    |         ----^^^
Dec 06 15:12:59.773 INFO [stderr]    |         |
Dec 06 15:12:59.773 INFO [stderr]    |         help: remove this `mut`
Dec 06 15:12:59.773 INFO [stderr]    |
Dec 06 15:12:59.773 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:12:59.773 INFO [stderr] 
Dec 06 15:12:59.773 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:12:59.773 INFO [stderr]   --> src/bin/mthread.rs:27:13
Dec 06 15:12:59.773 INFO [stderr]    |
Dec 06 15:12:59.773 INFO [stderr] 27 |         let mut ptr = ptr.clone();
Dec 06 15:12:59.773 INFO [stderr]    |             ----^^^
Dec 06 15:12:59.773 INFO [stderr]    |             |
Dec 06 15:12:59.773 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:12:59.773 INFO [stderr] 
Dec 06 15:12:59.774 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:12:59.774 INFO [stderr]   --> src/bin/mthread.rs:29:13
Dec 06 15:12:59.774 INFO [stderr]    |
Dec 06 15:12:59.774 INFO [stderr] 29 |         let mut tx = tx.clone();
Dec 06 15:12:59.774 INFO [stderr]    |             ----^^
Dec 06 15:12:59.774 INFO [stderr]    |             |
Dec 06 15:12:59.774 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:12:59.774 INFO [stderr] 
Dec 06 15:12:59.774 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:12:59.774 INFO [stderr]   --> src/bin/mthread.rs:20:21
Dec 06 15:12:59.774 INFO [stderr]    |
Dec 06 15:12:59.774 INFO [stderr] 20 |                     a.send(1);
Dec 06 15:12:59.774 INFO [stderr]    |                     ^^^^^^^^^^
Dec 06 15:12:59.774 INFO [stderr]    |
Dec 06 15:12:59.774 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:12:59.774 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:12:59.774 INFO [stderr] 
Dec 06 15:12:59.774 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:12:59.774 INFO [stderr]   --> src/bin/mthread.rs:34:17
Dec 06 15:12:59.774 INFO [stderr]    |
Dec 06 15:12:59.774 INFO [stderr] 34 |                 tx.send(d);
Dec 06 15:12:59.774 INFO [stderr]    |                 ^^^^^^^^^^^
Dec 06 15:12:59.774 INFO [stderr]    |
Dec 06 15:12:59.774 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:12:59.774 INFO [stderr] 
Dec 06 15:13:00.456 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
Dec 06 15:13:00.463 INFO [stderr] su: No module specific data is present
Dec 06 15:13:00.751 INFO running `"docker" "inspect" "8d6e1dcf7f536c906f373de3eb02510c70c7ecff552dd4973ea92aa8228a7f0a"`
Dec 06 15:13:00.815 INFO running `"docker" "rm" "-f" "8d6e1dcf7f536c906f373de3eb02510c70c7ecff552dd4973ea92aa8228a7f0a"`
Dec 06 15:13:00.871 INFO [stdout] 8d6e1dcf7f536c906f373de3eb02510c70c7ecff552dd4973ea92aa8228a7f0a
Dec 06 15:13:00.872 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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 06 15:13:01.027 INFO [stdout] 4f9eed81cab3bc284f9aad4ca80478188935cc00a65e91bff6b835fe6fdad904
Dec 06 15:13:01.028 INFO running `"docker" "start" "-a" "4f9eed81cab3bc284f9aad4ca80478188935cc00a65e91bff6b835fe6fdad904"`
Dec 06 15:13:01.344 INFO [stderr] usermod: no changes
Dec 06 15:13:01.364 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Dec 06 15:13:01.364 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Dec 06 15:13:01.364 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Dec 06 15:13:01.364 INFO [stderr] files will be included as a binary target:
Dec 06 15:13:01.364 INFO [stderr] 
Dec 06 15:13:01.364 INFO [stderr] * /source/src/main.rs
Dec 06 15:13:01.364 INFO [stderr] 
Dec 06 15:13:01.364 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Dec 06 15:13:01.364 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Dec 06 15:13:01.364 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Dec 06 15:13:01.364 INFO [stderr] section. You may also move the files to a location where Cargo would not
Dec 06 15:13:01.364 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Dec 06 15:13:01.364 INFO [stderr] 
Dec 06 15:13:01.364 INFO [stderr] For more information on this warning you can consult
Dec 06 15:13:01.364 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Dec 06 15:13:01.364 INFO [stderr] warning: path `/source/src/main.rs` was erroneously implicitly accepted for binary `main`,
Dec 06 15:13:01.364 INFO [stderr] please set bin.path in Cargo.toml
Dec 06 15:13:01.366 INFO [stderr]    Compiling learn v0.1.0 (/source)
Dec 06 15:13:01.750 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:13:01.750 INFO [stderr]   --> src/bin/mthread.rs:11:9
Dec 06 15:13:01.750 INFO [stderr]    |
Dec 06 15:13:01.750 INFO [stderr] 11 |     let mut ptr = Arc::new(Mutex::new("hello world!".chars()));
Dec 06 15:13:01.750 INFO [stderr]    |         ----^^^
Dec 06 15:13:01.750 INFO [stderr]    |         |
Dec 06 15:13:01.750 INFO [stderr]    |         help: remove this `mut`
Dec 06 15:13:01.750 INFO [stderr]    |
Dec 06 15:13:01.750 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:13:01.750 INFO [stderr] 
Dec 06 15:13:01.750 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:13:01.750 INFO [stderr]   --> src/bin/mthread.rs:27:13
Dec 06 15:13:01.750 INFO [stderr]    |
Dec 06 15:13:01.750 INFO [stderr] 27 |         let mut ptr = ptr.clone();
Dec 06 15:13:01.750 INFO [stderr]    |             ----^^^
Dec 06 15:13:01.750 INFO [stderr]    |             |
Dec 06 15:13:01.750 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:13:01.750 INFO [stderr] 
Dec 06 15:13:01.750 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:13:01.750 INFO [stderr]   --> src/bin/mthread.rs:29:13
Dec 06 15:13:01.750 INFO [stderr]    |
Dec 06 15:13:01.750 INFO [stderr] 29 |         let mut tx = tx.clone();
Dec 06 15:13:01.750 INFO [stderr]    |             ----^^
Dec 06 15:13:01.750 INFO [stderr]    |             |
Dec 06 15:13:01.750 INFO [stderr]    |             help: remove this `mut`
Dec 06 15:13:01.750 INFO [stderr] 
Dec 06 15:13:01.752 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:13:01.752 INFO [stderr]   --> src/bin/mthread.rs:20:21
Dec 06 15:13:01.752 INFO [stderr]    |
Dec 06 15:13:01.752 INFO [stderr] 20 |                     a.send(1);
Dec 06 15:13:01.752 INFO [stderr]    |                     ^^^^^^^^^^
Dec 06 15:13:01.752 INFO [stderr]    |
Dec 06 15:13:01.752 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:13:01.752 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:13:01.752 INFO [stderr] 
Dec 06 15:13:01.752 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:13:01.752 INFO [stderr]   --> src/bin/mthread.rs:34:17
Dec 06 15:13:01.752 INFO [stderr]    |
Dec 06 15:13:01.752 INFO [stderr] 34 |                 tx.send(d);
Dec 06 15:13:01.752 INFO [stderr]    |                 ^^^^^^^^^^^
Dec 06 15:13:01.752 INFO [stderr]    |
Dec 06 15:13:01.752 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:13:01.752 INFO [stderr] 
Dec 06 15:13:02.060 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Dec 06 15:13:02.064 INFO [stderr] su: No module specific data is present
Dec 06 15:13:02.381 INFO running `"docker" "inspect" "4f9eed81cab3bc284f9aad4ca80478188935cc00a65e91bff6b835fe6fdad904"`
Dec 06 15:13:02.446 INFO running `"docker" "rm" "-f" "4f9eed81cab3bc284f9aad4ca80478188935cc00a65e91bff6b835fe6fdad904"`
Dec 06 15:13:02.523 INFO [stdout] 4f9eed81cab3bc284f9aad4ca80478188935cc00a65e91bff6b835fe6fdad904
Dec 06 15:13:02.525 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen" "-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 06 15:13:02.777 INFO [stdout] 0bf0cafe0652f790042a7d076505b2c9edfcd763f38bd1e81cedd21792bc0d87
Dec 06 15:13:02.782 INFO running `"docker" "start" "-a" "0bf0cafe0652f790042a7d076505b2c9edfcd763f38bd1e81cedd21792bc0d87"`
Dec 06 15:13:03.216 INFO [stderr] usermod: no changes
Dec 06 15:13:03.240 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Dec 06 15:13:03.240 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Dec 06 15:13:03.240 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Dec 06 15:13:03.240 INFO [stderr] files will be included as a binary target:
Dec 06 15:13:03.240 INFO [stderr] 
Dec 06 15:13:03.240 INFO [stderr] * /source/src/main.rs
Dec 06 15:13:03.240 INFO [stderr] 
Dec 06 15:13:03.240 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Dec 06 15:13:03.240 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Dec 06 15:13:03.240 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Dec 06 15:13:03.240 INFO [stderr] section. You may also move the files to a location where Cargo would not
Dec 06 15:13:03.240 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Dec 06 15:13:03.240 INFO [stderr] 
Dec 06 15:13:03.240 INFO [stderr] For more information on this warning you can consult
Dec 06 15:13:03.240 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Dec 06 15:13:03.240 INFO [stderr] warning: path `/source/src/main.rs` was erroneously implicitly accepted for binary `main`,
Dec 06 15:13:03.240 INFO [stderr] please set bin.path in Cargo.toml
Dec 06 15:13:03.241 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 06 15:13:03.242 INFO [stderr]      Running /target/debug/deps/demo-db5b9c906b22939a
Dec 06 15:13:03.245 INFO [stdout] 
Dec 06 15:13:03.245 INFO [stdout] running 0 tests
Dec 06 15:13:03.245 INFO [stdout] 
Dec 06 15:13:03.245 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:13:03.245 INFO [stdout] 
Dec 06 15:13:03.245 INFO [stderr]      Running /target/debug/deps/main-a8fd43507bd484f1
Dec 06 15:13:03.246 INFO [stdout] 
Dec 06 15:13:03.246 INFO [stdout] running 0 tests
Dec 06 15:13:03.246 INFO [stdout] 
Dec 06 15:13:03.246 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:13:03.246 INFO [stdout] 
Dec 06 15:13:03.246 INFO [stderr]      Running /target/debug/deps/mthread-56380b1f79f1dee9
Dec 06 15:13:03.248 INFO [stdout] 
Dec 06 15:13:03.248 INFO [stdout] running 0 tests
Dec 06 15:13:03.248 INFO [stdout] 
Dec 06 15:13:03.248 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:13:03.248 INFO [stdout] 
Dec 06 15:13:03.249 INFO [stderr] su: No module specific data is present
Dec 06 15:13:03.622 INFO running `"docker" "inspect" "0bf0cafe0652f790042a7d076505b2c9edfcd763f38bd1e81cedd21792bc0d87"`
Dec 06 15:13:03.754 INFO running `"docker" "rm" "-f" "0bf0cafe0652f790042a7d076505b2c9edfcd763f38bd1e81cedd21792bc0d87"`
Dec 06 15:13:03.964 INFO [stdout] 0bf0cafe0652f790042a7d076505b2c9edfcd763f38bd1e81cedd21792bc0d87