Dec 11 17:39:11.797 INFO checking gyscos/varf against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 17:39:11.797 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-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 11 17:39:12.075 INFO [stdout] 43bef7927e786d33c693c03bba7d83edf5bfc81eaa3bcfdd7d62f818f44716e7
Dec 11 17:39:12.077 INFO running `"docker" "start" "-a" "43bef7927e786d33c693c03bba7d83edf5bfc81eaa3bcfdd7d62f818f44716e7"`
Dec 11 17:39:12.531 INFO [stderr] usermod: no changes
Dec 11 17:39:12.705 INFO [stderr]     Checking toml v0.4.1
Dec 11 17:39:12.707 INFO [stderr]     Checking handlebars v0.26.2
Dec 11 17:39:12.707 INFO [stderr]     Checking iron v0.5.1
Dec 11 17:39:15.134 INFO [stderr]     Checking persistent v0.3.0
Dec 11 17:39:15.141 INFO [stderr]     Checking mount v0.3.0
Dec 11 17:39:15.143 INFO [stderr]     Checking router v0.5.1
Dec 11 17:39:16.856 INFO [stderr]     Checking staticfile v0.4.0
Dec 11 17:39:17.145 INFO [stderr]     Checking bodyparser v0.5.0
Dec 11 17:39:17.344 INFO [stderr]     Checking handlebars-iron v0.24.1
Dec 11 17:39:18.817 INFO [stderr]     Checking urlencoded v0.5.0
Dec 11 17:39:20.188 INFO [stderr]     Checking varf v0.1.2 (/source)
Dec 11 17:39:23.361 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 11 17:39:23.361 INFO [stderr]   --> src/visu.rs:71:5
Dec 11 17:39:23.361 INFO [stderr]    |
Dec 11 17:39:23.361 INFO [stderr] 71 | /     divs.iter()
Dec 11 17:39:23.361 INFO [stderr] 72 | |         .rev()
Dec 11 17:39:23.361 INFO [stderr] 73 | |         .map(|k| n / k)
Dec 11 17:39:23.361 INFO [stderr] 74 | |         .collect::<Vec<usize>>()
Dec 11 17:39:23.361 INFO [stderr] 75 | |         .iter()
Dec 11 17:39:23.361 INFO [stderr] 76 | |         .map(|k| divs.push(*k))
Dec 11 17:39:23.361 INFO [stderr] 77 | |         .collect::<Vec<()>>();
Dec 11 17:39:23.361 INFO [stderr]    | |______________________________^
Dec 11 17:39:23.361 INFO [stderr]    |
Dec 11 17:39:23.361 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 17:39:23.361 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 11 17:39:23.361 INFO [stderr] 
Dec 11 17:39:23.464 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 11 17:39:23.464 INFO [stderr]   --> src/visu.rs:71:5
Dec 11 17:39:23.464 INFO [stderr]    |
Dec 11 17:39:23.464 INFO [stderr] 71 | /     divs.iter()
Dec 11 17:39:23.464 INFO [stderr] 72 | |         .rev()
Dec 11 17:39:23.464 INFO [stderr] 73 | |         .map(|k| n / k)
Dec 11 17:39:23.464 INFO [stderr] 74 | |         .collect::<Vec<usize>>()
Dec 11 17:39:23.464 INFO [stderr] 75 | |         .iter()
Dec 11 17:39:23.464 INFO [stderr] 76 | |         .map(|k| divs.push(*k))
Dec 11 17:39:23.464 INFO [stderr] 77 | |         .collect::<Vec<()>>();
Dec 11 17:39:23.465 INFO [stderr]    | |______________________________^
Dec 11 17:39:23.465 INFO [stderr]    |
Dec 11 17:39:23.465 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 17:39:23.465 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 11 17:39:23.465 INFO [stderr] 
Dec 11 17:39:23.511 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.95s
Dec 11 17:39:23.525 INFO [stderr] su: No module specific data is present
Dec 11 17:39:24.322 INFO running `"docker" "inspect" "43bef7927e786d33c693c03bba7d83edf5bfc81eaa3bcfdd7d62f818f44716e7"`
Dec 11 17:39:24.596 INFO running `"docker" "rm" "-f" "43bef7927e786d33c693c03bba7d83edf5bfc81eaa3bcfdd7d62f818f44716e7"`
Dec 11 17:39:24.812 INFO [stdout] 43bef7927e786d33c693c03bba7d83edf5bfc81eaa3bcfdd7d62f818f44716e7