Dec 19 19:29:40.379 INFO checking bstrydo/xconf against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:29:40.379 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/bstrydo/xconf:/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=forbid" "-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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:29:40.922 INFO [stdout] 665226dfac7eff6c3ab428bbe6b4992658e4dc59a440e2ed635225513deaf0f1
Dec 19 19:29:40.924 INFO running `"docker" "start" "-a" "665226dfac7eff6c3ab428bbe6b4992658e4dc59a440e2ed635225513deaf0f1"`
Dec 19 19:29:43.647 INFO [stderr]     Checking hyper v0.10.12
Dec 19 19:29:47.338 INFO [stderr]     Checking iron v0.5.1
Dec 19 19:29:48.158 INFO [stderr]     Checking router v0.5.1
Dec 19 19:29:48.783 INFO [stderr]     Checking xconf v0.1.0 (/opt/crater/workdir)
Dec 19 19:29:49.750 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:29:49.751 INFO [stderr]   --> src/bin/thread_example.rs:12:9
Dec 19 19:29:49.751 INFO [stderr]    |
Dec 19 19:29:49.751 INFO [stderr] 12 |     let mut handles = vec![
Dec 19 19:29:49.751 INFO [stderr]    |         ----^^^^^^^
Dec 19 19:29:49.751 INFO [stderr]    |         |
Dec 19 19:29:49.751 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:29:49.751 INFO [stderr]    |
Dec 19 19:29:49.751 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:29:49.751 INFO [stderr] 
Dec 19 19:29:49.792 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:29:49.792 INFO [stderr]   --> src/bin/thread_example.rs:18:9
Dec 19 19:29:49.792 INFO [stderr]    |
Dec 19 19:29:49.792 INFO [stderr] 18 |         handle.join();
Dec 19 19:29:49.792 INFO [stderr]    |         ^^^^^^^^^^^^^^
Dec 19 19:29:49.792 INFO [stderr]    |
Dec 19 19:29:49.792 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:29:49.793 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:29:49.793 INFO [stderr] 
Dec 19 19:29:50.452 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:29:50.452 INFO [stderr]   --> src/bin/thread_example.rs:12:9
Dec 19 19:29:50.452 INFO [stderr]    |
Dec 19 19:29:50.452 INFO [stderr] 12 |     let mut handles = vec![
Dec 19 19:29:50.452 INFO [stderr]    |         ----^^^^^^^
Dec 19 19:29:50.453 INFO [stderr]    |         |
Dec 19 19:29:50.453 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:29:50.453 INFO [stderr]    |
Dec 19 19:29:50.453 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:29:50.453 INFO [stderr] 
Dec 19 19:29:50.453 INFO [stderr] warning: variable `weird` is assigned to, but never used
Dec 19 19:29:50.453 INFO [stderr]   --> src/bin/lifetimes.rs:11:9
Dec 19 19:29:50.453 INFO [stderr]    |
Dec 19 19:29:50.453 INFO [stderr] 11 |     let weird; //starts living here
Dec 19 19:29:50.453 INFO [stderr]    |         ^^^^^
Dec 19 19:29:50.453 INFO [stderr]    |
Dec 19 19:29:50.453 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 19:29:50.460 INFO [stderr]    = note: consider using `_weird` instead
Dec 19 19:29:50.460 INFO [stderr] 
Dec 19 19:29:50.461 INFO [stderr] warning: value assigned to `weird` is never read
Dec 19 19:29:50.461 INFO [stderr]   --> src/bin/lifetimes.rs:15:9
Dec 19 19:29:50.461 INFO [stderr]    |
Dec 19 19:29:50.461 INFO [stderr] 15 |         weird = do_something_weird(&my_v1, 3, my_v2);
Dec 19 19:29:50.461 INFO [stderr]    |         ^^^^^
Dec 19 19:29:50.461 INFO [stderr]    |
Dec 19 19:29:50.461 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:29:50.461 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:29:50.461 INFO [stderr] 
Dec 19 19:29:50.555 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:29:50.555 INFO [stderr]   --> src/bin/thread_example.rs:18:9
Dec 19 19:29:50.555 INFO [stderr]    |
Dec 19 19:29:50.555 INFO [stderr] 18 |         handle.join();
Dec 19 19:29:50.555 INFO [stderr]    |         ^^^^^^^^^^^^^^
Dec 19 19:29:50.555 INFO [stderr]    |
Dec 19 19:29:50.555 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:29:50.556 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:29:50.556 INFO [stderr] 
Dec 19 19:29:50.784 INFO [stderr] warning: variable `weird` is assigned to, but never used
Dec 19 19:29:50.784 INFO [stderr]   --> src/bin/lifetimes.rs:11:9
Dec 19 19:29:50.784 INFO [stderr]    |
Dec 19 19:29:50.785 INFO [stderr] 11 |     let weird; //starts living here
Dec 19 19:29:50.785 INFO [stderr]    |         ^^^^^
Dec 19 19:29:50.812 INFO [stderr]    |
Dec 19 19:29:50.812 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 19:29:50.812 INFO [stderr]    = note: consider using `_weird` instead
Dec 19 19:29:50.813 INFO [stderr] 
Dec 19 19:29:50.813 INFO [stderr] warning: value assigned to `weird` is never read
Dec 19 19:29:50.813 INFO [stderr]   --> src/bin/lifetimes.rs:15:9
Dec 19 19:29:50.813 INFO [stderr]    |
Dec 19 19:29:50.813 INFO [stderr] 15 |         weird = do_something_weird(&my_v1, 3, my_v2);
Dec 19 19:29:50.813 INFO [stderr]    |         ^^^^^
Dec 19 19:29:50.813 INFO [stderr]    |
Dec 19 19:29:50.813 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:29:50.814 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:29:50.814 INFO [stderr] 
Dec 19 19:29:51.864 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.37s
Dec 19 19:29:53.042 INFO running `"docker" "inspect" "665226dfac7eff6c3ab428bbe6b4992658e4dc59a440e2ed635225513deaf0f1"`
Dec 19 19:29:53.362 INFO running `"docker" "rm" "-f" "665226dfac7eff6c3ab428bbe6b4992658e4dc59a440e2ed635225513deaf0f1"`
Dec 19 19:29:53.738 INFO [stdout] 665226dfac7eff6c3ab428bbe6b4992658e4dc59a440e2ed635225513deaf0f1