Dec 02 07:55:58.480 INFO testing Ermain-12/Introduction-to-Rust against 1.30.1 for beta-1.31-5
Dec 02 07:55:58.481 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/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 +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 07:55:58.709 INFO [stdout] 0432ddd29f635a4ae23bf6c9d1f9e132f66caf6786a6b1fd15c7b9b941b50348
Dec 02 07:55:58.711 INFO running `"docker" "start" "-a" "0432ddd29f635a4ae23bf6c9d1f9e132f66caf6786a6b1fd15c7b9b941b50348"`
Dec 02 07:55:59.283 INFO [stderr] usermod: no changes
Dec 02 07:55:59.326 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 02 07:56:00.394 INFO [stderr] warning: variable does not need to be mutable
Dec 02 07:56:00.394 INFO [stderr]   --> src/main.rs:27:8
Dec 02 07:56:00.394 INFO [stderr]    |
Dec 02 07:56:00.394 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Dec 02 07:56:00.394 INFO [stderr]    |        ----^^^^^^^^^^
Dec 02 07:56:00.394 INFO [stderr]    |        |
Dec 02 07:56:00.394 INFO [stderr]    |        help: remove this `mut`
Dec 02 07:56:00.394 INFO [stderr]    |
Dec 02 07:56:00.394 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 02 07:56:00.394 INFO [stderr] 
Dec 02 07:56:01.325 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
Dec 02 07:56:01.334 INFO [stderr] su: No module specific data is present
Dec 02 07:56:01.714 INFO running `"docker" "inspect" "0432ddd29f635a4ae23bf6c9d1f9e132f66caf6786a6b1fd15c7b9b941b50348"`
Dec 02 07:56:01.784 INFO running `"docker" "rm" "-f" "0432ddd29f635a4ae23bf6c9d1f9e132f66caf6786a6b1fd15c7b9b941b50348"`
Dec 02 07:56:01.891 INFO [stdout] 0432ddd29f635a4ae23bf6c9d1f9e132f66caf6786a6b1fd15c7b9b941b50348
Dec 02 07:56:01.896 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 07:56:02.122 INFO [stdout] 7a8aaf5f1732543d1196c492b33ab3e6fece9f498ada452aa524a75196f879f7
Dec 02 07:56:02.127 INFO running `"docker" "start" "-a" "7a8aaf5f1732543d1196c492b33ab3e6fece9f498ada452aa524a75196f879f7"`
Dec 02 07:56:02.537 INFO [stderr] usermod: no changes
Dec 02 07:56:02.587 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 02 07:56:03.556 INFO [stderr] warning: variable does not need to be mutable
Dec 02 07:56:03.556 INFO [stderr]   --> src/main.rs:27:8
Dec 02 07:56:03.556 INFO [stderr]    |
Dec 02 07:56:03.556 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Dec 02 07:56:03.556 INFO [stderr]    |        ----^^^^^^^^^^
Dec 02 07:56:03.556 INFO [stderr]    |        |
Dec 02 07:56:03.556 INFO [stderr]    |        help: remove this `mut`
Dec 02 07:56:03.556 INFO [stderr]    |
Dec 02 07:56:03.556 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 02 07:56:03.556 INFO [stderr] 
Dec 02 07:56:03.942 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
Dec 02 07:56:03.946 INFO [stderr] su: No module specific data is present
Dec 02 07:56:04.244 INFO running `"docker" "inspect" "7a8aaf5f1732543d1196c492b33ab3e6fece9f498ada452aa524a75196f879f7"`
Dec 02 07:56:04.341 INFO running `"docker" "rm" "-f" "7a8aaf5f1732543d1196c492b33ab3e6fece9f498ada452aa524a75196f879f7"`
Dec 02 07:56:04.413 INFO [stdout] 7a8aaf5f1732543d1196c492b33ab3e6fece9f498ada452aa524a75196f879f7
Dec 02 07:56:04.415 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 07:56:04.604 INFO [stdout] 8a45939b762fa96ef69a3cdb45724e75f239b6324cb323369b6d40d4e3d2d5c7
Dec 02 07:56:04.608 INFO running `"docker" "start" "-a" "8a45939b762fa96ef69a3cdb45724e75f239b6324cb323369b6d40d4e3d2d5c7"`
Dec 02 07:56:05.159 INFO [stderr] usermod: no changes
Dec 02 07:56:05.213 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
Dec 02 07:56:05.228 INFO [stderr]      Running /target/debug/deps/hello_world-245a7661f7f3e7f6
Dec 02 07:56:05.228 INFO [stderr] su: No module specific data is present
Dec 02 07:56:05.229 INFO [stdout] 
Dec 02 07:56:05.229 INFO [stdout] running 0 tests
Dec 02 07:56:05.229 INFO [stdout] 
Dec 02 07:56:05.229 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 02 07:56:05.229 INFO [stdout] 
Dec 02 07:56:05.560 INFO running `"docker" "inspect" "8a45939b762fa96ef69a3cdb45724e75f239b6324cb323369b6d40d4e3d2d5c7"`
Dec 02 07:56:05.682 INFO running `"docker" "rm" "-f" "8a45939b762fa96ef69a3cdb45724e75f239b6324cb323369b6d40d4e3d2d5c7"`
Dec 02 07:56:05.750 INFO [stdout] 8a45939b762fa96ef69a3cdb45724e75f239b6324cb323369b6d40d4e3d2d5c7
