Dec 11 23:56:34.732 INFO checking ThomasHertleif/cluster-heist against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 23:56:34.732 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 23:56:35.056 INFO [stdout] 37f625cd8688270721483830bcd3bc6d1c0120c10cd5769593d40b644d3da9e2
Dec 11 23:56:35.058 INFO running `"docker" "start" "-a" "37f625cd8688270721483830bcd3bc6d1c0120c10cd5769593d40b644d3da9e2"`
Dec 11 23:56:35.708 INFO [stderr] usermod: no changes
Dec 11 23:56:35.904 INFO [stderr]     Checking serde v1.0.53
Dec 11 23:56:35.916 INFO [stderr]     Checking http v0.1.5
Dec 11 23:56:35.920 INFO [stderr]    Compiling serde_derive v1.0.53
Dec 11 23:56:35.928 INFO [stderr]     Checking env_logger v0.3.5
Dec 11 23:56:42.766 INFO [stderr]     Checking simple-server v0.3.0
Dec 11 23:56:55.945 INFO [stderr]     Checking serde_json v1.0.17
Dec 11 23:56:59.404 INFO [stderr]     Checking cluster-heist v0.1.0 (/source)
Dec 11 23:57:00.924 INFO [stderr] warning: unused import: `DirEntry`
Dec 11 23:57:00.924 INFO [stderr]   --> src/main.rs:60:25
Dec 11 23:57:00.924 INFO [stderr]    |
Dec 11 23:57:00.924 INFO [stderr] 60 |     use std::fs::{self, DirEntry};
Dec 11 23:57:00.924 INFO [stderr]    |                         ^^^^^^^^
Dec 11 23:57:00.924 INFO [stderr]    |
Dec 11 23:57:00.924 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 11 23:57:00.924 INFO [stderr] 
Dec 11 23:57:01.012 INFO [stderr] warning: unused import: `DirEntry`
Dec 11 23:57:01.012 INFO [stderr]   --> src/main.rs:60:25
Dec 11 23:57:01.012 INFO [stderr]    |
Dec 11 23:57:01.012 INFO [stderr] 60 |     use std::fs::{self, DirEntry};
Dec 11 23:57:01.012 INFO [stderr]    |                         ^^^^^^^^
Dec 11 23:57:01.012 INFO [stderr]    |
Dec 11 23:57:01.012 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 11 23:57:01.012 INFO [stderr] 
Dec 11 23:57:01.144 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 23:57:01.144 INFO [stderr]   --> src/main.rs:56:5
Dec 11 23:57:01.144 INFO [stderr]    |
Dec 11 23:57:01.144 INFO [stderr] 56 |     t.join();
Dec 11 23:57:01.144 INFO [stderr]    |     ^^^^^^^^^
Dec 11 23:57:01.144 INFO [stderr]    |
Dec 11 23:57:01.144 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 23:57:01.144 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 23:57:01.144 INFO [stderr] 
Dec 11 23:57:01.210 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 23:57:01.210 INFO [stderr]   --> src/main.rs:56:5
Dec 11 23:57:01.210 INFO [stderr]    |
Dec 11 23:57:01.210 INFO [stderr] 56 |     t.join();
Dec 11 23:57:01.210 INFO [stderr]    |     ^^^^^^^^^
Dec 11 23:57:01.210 INFO [stderr]    |
Dec 11 23:57:01.210 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 23:57:01.210 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 23:57:01.210 INFO [stderr] 
Dec 11 23:57:01.252 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.52s
Dec 11 23:57:01.260 INFO [stderr] su: No module specific data is present
Dec 11 23:57:01.754 INFO running `"docker" "inspect" "37f625cd8688270721483830bcd3bc6d1c0120c10cd5769593d40b644d3da9e2"`
Dec 11 23:57:01.846 INFO running `"docker" "rm" "-f" "37f625cd8688270721483830bcd3bc6d1c0120c10cd5769593d40b644d3da9e2"`
Dec 11 23:57:02.011 INFO [stdout] 37f625cd8688270721483830bcd3bc6d1c0120c10cd5769593d40b644d3da9e2