Dec 12 23:29:18.398 INFO testing trafficland/counter against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 12 23:29:18.398 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 12 23:29:20.305 INFO [stdout] 4980a47c3a594f97cc946f8973ed143bb48be54f7c0213ae718fa2bb52123754
Dec 12 23:29:20.311 INFO running `"docker" "start" "-a" "4980a47c3a594f97cc946f8973ed143bb48be54f7c0213ae718fa2bb52123754"`
Dec 12 23:29:21.828 INFO [stderr] usermod: no changes
Dec 12 23:29:22.057 INFO [stderr]    Compiling scopeguard v0.1.2
Dec 12 23:29:22.057 INFO [stderr]    Compiling crossbeam v0.2.10
Dec 12 23:29:22.057 INFO [stderr]    Compiling vec_map v0.7.0
Dec 12 23:29:22.067 INFO [stderr]    Compiling log v0.3.7
Dec 12 23:29:22.067 INFO [stderr]    Compiling variance v0.1.3
Dec 12 23:29:22.067 INFO [stderr]    Compiling num-integer v0.1.34
Dec 12 23:29:22.067 INFO [stderr]    Compiling time v0.1.37
Dec 12 23:29:22.067 INFO [stderr]    Compiling memchr v0.1.11
Dec 12 23:29:23.323 INFO [stderr]    Compiling memchr v1.0.1
Dec 12 23:29:23.718 INFO [stderr]    Compiling thread-id v3.0.0
Dec 12 23:29:24.951 INFO [stderr]    Compiling atty v0.2.2
Dec 12 23:29:24.951 INFO [stderr]    Compiling term_size v0.3.0
Dec 12 23:29:24.951 INFO [stderr]    Compiling num_cpus v1.4.0
Dec 12 23:29:24.955 INFO [stderr]    Compiling aho-corasick v0.5.3
Dec 12 23:29:24.984 INFO [stderr]    Compiling aho-corasick v0.6.3
Dec 12 23:29:25.275 INFO [stderr]    Compiling thread_local v0.3.3
Dec 12 23:29:26.021 INFO [stderr]    Compiling num-iter v0.1.33
Dec 12 23:29:26.057 INFO [stderr]    Compiling thread-id v2.0.0
Dec 12 23:29:26.995 INFO [stderr]    Compiling clap v2.23.3
Dec 12 23:29:27.415 INFO [stderr]    Compiling thread_local v0.2.7
Dec 12 23:29:29.844 INFO [stderr]    Compiling num v0.1.37
Dec 12 23:29:30.032 INFO [stderr]    Compiling regex v0.1.80
Dec 12 23:29:30.952 INFO [stderr]    Compiling scoped-pool v1.0.0
Dec 12 23:29:31.045 INFO [stderr]    Compiling chrono v0.2.25
Dec 12 23:29:31.108 INFO [stderr]    Compiling regex v0.2.1
Dec 12 23:29:40.180 INFO [stderr]    Compiling counter v1.0.0 (/source)
Dec 12 23:29:40.181 INFO [stderr]    Compiling elp v2.0.0
Dec 12 23:30:02.697 INFO [stderr]    Compiling env_logger v0.3.5
Dec 12 23:30:21.607 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:21.607 INFO [stderr]   --> src/aggregation_control.rs:24:39
Dec 12 23:30:21.607 INFO [stderr]    |
Dec 12 23:30:21.607 INFO [stderr] 24 |     pub fn run_aggregation(&mut self, mut filenames: &mut Vec<PathBuf>) -> FileAggregation {
Dec 12 23:30:21.607 INFO [stderr]    |                                       ----^^^^^^^^^
Dec 12 23:30:21.607 INFO [stderr]    |                                       |
Dec 12 23:30:21.607 INFO [stderr]    |                                       help: remove this `mut`
Dec 12 23:30:21.607 INFO [stderr]    |
Dec 12 23:30:21.607 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 23:30:21.607 INFO [stderr] 
Dec 12 23:30:23.615 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:23.615 INFO [stderr]   --> src/main.rs:96:52
Dec 12 23:30:23.615 INFO [stderr]    |
Dec 12 23:30:23.615 INFO [stderr] 96 |     fn run(&mut self, num_file_aggregators: usize, mut filenames: &mut Vec<PathBuf>) -> counter::FileAggregation {
Dec 12 23:30:23.615 INFO [stderr]    |                                                    ----^^^^^^^^^
Dec 12 23:30:23.615 INFO [stderr]    |                                                    |
Dec 12 23:30:23.615 INFO [stderr]    |                                                    help: remove this `mut`
Dec 12 23:30:23.615 INFO [stderr]    |
Dec 12 23:30:23.615 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 23:30:23.615 INFO [stderr] 
Dec 12 23:30:26.739 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
Dec 12 23:30:26.745 INFO [stderr] su: No module specific data is present
Dec 12 23:30:27.192 INFO running `"docker" "inspect" "4980a47c3a594f97cc946f8973ed143bb48be54f7c0213ae718fa2bb52123754"`
Dec 12 23:30:27.513 INFO running `"docker" "rm" "-f" "4980a47c3a594f97cc946f8973ed143bb48be54f7c0213ae718fa2bb52123754"`
Dec 12 23:30:27.834 INFO [stdout] 4980a47c3a594f97cc946f8973ed143bb48be54f7c0213ae718fa2bb52123754
Dec 12 23:30:27.847 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 12 23:30:28.303 INFO [stdout] 3237d78b86c30409963b8af8ff6c91ed8a1dc6ddd78b41b6633c16ab99d6e41f
Dec 12 23:30:28.310 INFO running `"docker" "start" "-a" "3237d78b86c30409963b8af8ff6c91ed8a1dc6ddd78b41b6633c16ab99d6e41f"`
Dec 12 23:30:29.451 INFO [stderr] usermod: no changes
Dec 12 23:30:29.555 INFO [stderr]    Compiling names v0.11.0
Dec 12 23:30:30.992 INFO [stderr]    Compiling counter v1.0.0 (/source)
Dec 12 23:30:31.603 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:31.603 INFO [stderr]   --> src/main.rs:96:52
Dec 12 23:30:31.603 INFO [stderr]    |
Dec 12 23:30:31.603 INFO [stderr] 96 |     fn run(&mut self, num_file_aggregators: usize, mut filenames: &mut Vec<PathBuf>) -> counter::FileAggregation {
Dec 12 23:30:31.603 INFO [stderr]    |                                                    ----^^^^^^^^^
Dec 12 23:30:31.603 INFO [stderr]    |                                                    |
Dec 12 23:30:31.603 INFO [stderr]    |                                                    help: remove this `mut`
Dec 12 23:30:31.603 INFO [stderr]    |
Dec 12 23:30:31.603 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 23:30:31.603 INFO [stderr] 
Dec 12 23:30:31.683 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:31.683 INFO [stderr]    --> src/file_handling.rs:355:23
Dec 12 23:30:31.683 INFO [stderr]     |
Dec 12 23:30:31.683 INFO [stderr] 355 |                 .map(|mut g| g.next().unwrap())
Dec 12 23:30:31.683 INFO [stderr]     |                       ----^
Dec 12 23:30:31.683 INFO [stderr]     |                       |
Dec 12 23:30:31.683 INFO [stderr]     |                       help: remove this `mut`
Dec 12 23:30:31.683 INFO [stderr]     |
Dec 12 23:30:31.683 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 23:30:31.683 INFO [stderr] 
Dec 12 23:30:31.731 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:31.731 INFO [stderr]   --> src/aggregation_control.rs:24:39
Dec 12 23:30:31.731 INFO [stderr]    |
Dec 12 23:30:31.731 INFO [stderr] 24 |     pub fn run_aggregation(&mut self, mut filenames: &mut Vec<PathBuf>) -> FileAggregation {
Dec 12 23:30:31.731 INFO [stderr]    |                                       ----^^^^^^^^^
Dec 12 23:30:31.731 INFO [stderr]    |                                       |
Dec 12 23:30:31.731 INFO [stderr]    |                                       help: remove this `mut`
Dec 12 23:30:31.731 INFO [stderr] 
Dec 12 23:30:35.496 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.02s
Dec 12 23:30:35.504 INFO [stderr] su: No module specific data is present
Dec 12 23:30:36.231 INFO running `"docker" "inspect" "3237d78b86c30409963b8af8ff6c91ed8a1dc6ddd78b41b6633c16ab99d6e41f"`
Dec 12 23:30:36.467 INFO running `"docker" "rm" "-f" "3237d78b86c30409963b8af8ff6c91ed8a1dc6ddd78b41b6633c16ab99d6e41f"`
Dec 12 23:30:36.830 INFO [stdout] 3237d78b86c30409963b8af8ff6c91ed8a1dc6ddd78b41b6633c16ab99d6e41f