Dec 17 21:48:08.874 INFO checking k3d3/Roam against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 21:48:08.874 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/k3d3/Roam:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 21:48:09.182 INFO [stdout] 069cf78219d1312605646d056f9f5348a37d19297f138fc64b894b1c85a09b2e
Dec 17 21:48:09.184 INFO running `"docker" "start" "-a" "069cf78219d1312605646d056f9f5348a37d19297f138fc64b894b1c85a09b2e"`
Dec 17 21:48:09.878 INFO [stderr]    Compiling backtrace-sys v0.1.10
Dec 17 21:48:09.878 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 17 21:48:09.879 INFO [stderr]     Checking futures v0.1.10
Dec 17 21:48:09.879 INFO [stderr]     Checking base64 v0.4.0
Dec 17 21:48:09.880 INFO [stderr]     Checking mio v0.6.4
Dec 17 21:48:13.064 INFO [stderr]     Checking tokio-core v0.1.4
Dec 17 21:48:13.064 INFO [stderr]     Checking tokio-service v0.1.0
Dec 17 21:48:15.194 INFO [stderr]     Checking tokio-proto v0.1.0
Dec 17 21:48:27.940 INFO [stderr]     Checking backtrace v0.3.0
Dec 17 21:48:28.454 INFO [stderr]     Checking error-chain v0.10.0
Dec 17 21:48:29.014 INFO [stderr]     Checking roam v0.1.0 (/opt/crater/workdir)
Dec 17 21:48:30.088 INFO [stderr] warning: method is never used: `to_pretty_json`
Dec 17 21:48:30.088 INFO [stderr]   --> src/network_config.rs:56:5
Dec 17 21:48:30.088 INFO [stderr]    |
Dec 17 21:48:30.088 INFO [stderr] 56 |     pub fn to_pretty_json(&self) -> Result<String> {
Dec 17 21:48:30.088 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:48:30.088 INFO [stderr]    |
Dec 17 21:48:30.088 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:48:30.088 INFO [stderr] 
Dec 17 21:48:30.122 INFO [stderr] warning: method is never used: `to_json`
Dec 17 21:48:30.123 INFO [stderr]   --> src/network_config.rs:52:5
Dec 17 21:48:30.123 INFO [stderr]    |
Dec 17 21:48:30.123 INFO [stderr] 52 |     pub fn to_json(&self) -> Result<String> {
Dec 17 21:48:30.124 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:48:30.124 INFO [stderr]    |
Dec 17 21:48:30.124 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:48:30.124 INFO [stderr] 
Dec 17 21:48:30.125 INFO [stderr] warning: method is never used: `to_pretty_json`
Dec 17 21:48:30.125 INFO [stderr]   --> src/network_config.rs:56:5
Dec 17 21:48:30.125 INFO [stderr]    |
Dec 17 21:48:30.125 INFO [stderr] 56 |     pub fn to_pretty_json(&self) -> Result<String> {
Dec 17 21:48:30.126 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:48:30.126 INFO [stderr] 
Dec 17 21:48:30.162 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.41s
Dec 17 21:48:31.560 INFO running `"docker" "inspect" "069cf78219d1312605646d056f9f5348a37d19297f138fc64b894b1c85a09b2e"`
Dec 17 21:48:31.914 INFO running `"docker" "rm" "-f" "069cf78219d1312605646d056f9f5348a37d19297f138fc64b894b1c85a09b2e"`
Dec 17 21:48:32.227 INFO [stdout] 069cf78219d1312605646d056f9f5348a37d19297f138fc64b894b1c85a09b2e