Nov 17 15:34:58.468 INFO testing Ermain-12/Introduction-to-Rust against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 17 15:34:58.469 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 17 15:34:58.894 INFO [stdout] a1215af34335148f0e3ea485e0c6ebef6c363092d468cc3ee35e8c428798b1ec
Nov 17 15:34:58.900 INFO running `"docker" "start" "-a" "a1215af34335148f0e3ea485e0c6ebef6c363092d468cc3ee35e8c428798b1ec"`
Nov 17 15:35:00.127 INFO [stderr] usermod: no changes
Nov 17 15:35:00.259 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Nov 17 15:35:01.191 INFO [stderr] warning: variable does not need to be mutable
Nov 17 15:35:01.191 INFO [stderr]   --> src/main.rs:27:8
Nov 17 15:35:01.191 INFO [stderr]    |
Nov 17 15:35:01.191 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Nov 17 15:35:01.191 INFO [stderr]    |        ----^^^^^^^^^^
Nov 17 15:35:01.191 INFO [stderr]    |        |
Nov 17 15:35:01.191 INFO [stderr]    |        help: remove this `mut`
Nov 17 15:35:01.191 INFO [stderr]    |
Nov 17 15:35:01.191 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 15:35:01.191 INFO [stderr] 
Nov 17 15:35:02.590 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
Nov 17 15:35:02.599 INFO [stderr] su: No module specific data is present
Nov 17 15:35:03.130 INFO running `"docker" "inspect" "a1215af34335148f0e3ea485e0c6ebef6c363092d468cc3ee35e8c428798b1ec"`
Nov 17 15:35:03.409 INFO running `"docker" "rm" "-f" "a1215af34335148f0e3ea485e0c6ebef6c363092d468cc3ee35e8c428798b1ec"`
Nov 17 15:35:03.833 INFO [stdout] a1215af34335148f0e3ea485e0c6ebef6c363092d468cc3ee35e8c428798b1ec
Nov 17 15:35:03.838 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 17 15:35:04.287 INFO [stdout] 604b95fc383039d7dd64ff9d77e9aeaae88595f76a3900cfae4079f692f9071f
Nov 17 15:35:04.293 INFO running `"docker" "start" "-a" "604b95fc383039d7dd64ff9d77e9aeaae88595f76a3900cfae4079f692f9071f"`
Nov 17 15:35:04.887 INFO [stderr] usermod: no changes
Nov 17 15:35:04.955 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Nov 17 15:35:05.743 INFO [stderr] warning: variable does not need to be mutable
Nov 17 15:35:05.743 INFO [stderr]   --> src/main.rs:27:8
Nov 17 15:35:05.743 INFO [stderr]    |
Nov 17 15:35:05.743 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Nov 17 15:35:05.743 INFO [stderr]    |        ----^^^^^^^^^^
Nov 17 15:35:05.743 INFO [stderr]    |        |
Nov 17 15:35:05.743 INFO [stderr]    |        help: remove this `mut`
Nov 17 15:35:05.743 INFO [stderr]    |
Nov 17 15:35:05.743 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 15:35:05.743 INFO [stderr] 
Nov 17 15:35:06.006 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
Nov 17 15:35:06.009 INFO [stderr] su: No module specific data is present
Nov 17 15:35:06.325 INFO running `"docker" "inspect" "604b95fc383039d7dd64ff9d77e9aeaae88595f76a3900cfae4079f692f9071f"`
Nov 17 15:35:06.393 INFO running `"docker" "rm" "-f" "604b95fc383039d7dd64ff9d77e9aeaae88595f76a3900cfae4079f692f9071f"`
Nov 17 15:35:06.546 INFO [stdout] 604b95fc383039d7dd64ff9d77e9aeaae88595f76a3900cfae4079f692f9071f
Nov 17 15:35:06.549 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 17 15:35:06.854 INFO [stdout] e41c768432f1f641fc83b3fba7af14e7e1076a02232373d8911ad98607074d3f
Nov 17 15:35:06.857 INFO running `"docker" "start" "-a" "e41c768432f1f641fc83b3fba7af14e7e1076a02232373d8911ad98607074d3f"`
Nov 17 15:35:07.478 INFO [stderr] usermod: no changes
Nov 17 15:35:07.552 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Nov 17 15:35:07.566 INFO [stderr]      Running /target/debug/deps/hello_world-8b81207481f770c3
Nov 17 15:35:07.570 INFO [stdout] 
Nov 17 15:35:07.571 INFO [stdout] running 0 tests
Nov 17 15:35:07.571 INFO [stdout] 
Nov 17 15:35:07.571 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 17 15:35:07.572 INFO [stdout] 
Nov 17 15:35:07.576 INFO [stderr] su: No module specific data is present
Nov 17 15:35:07.916 INFO running `"docker" "inspect" "e41c768432f1f641fc83b3fba7af14e7e1076a02232373d8911ad98607074d3f"`
Nov 17 15:35:08.065 INFO running `"docker" "rm" "-f" "e41c768432f1f641fc83b3fba7af14e7e1076a02232373d8911ad98607074d3f"`
Nov 17 15:35:08.302 INFO [stdout] e41c768432f1f641fc83b3fba7af14e7e1076a02232373d8911ad98607074d3f