Dec 19 14:40:13.422 INFO checking k3d3/Roam against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:40:13.422 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 14:40:13.806 INFO [stdout] b2b5a509712bbc5d7a2eb05beaed291f864761c8c9db8234666d4eb701efea9f
Dec 19 14:40:13.809 INFO running `"docker" "start" "-a" "b2b5a509712bbc5d7a2eb05beaed291f864761c8c9db8234666d4eb701efea9f"`
Dec 19 14:40:14.878 INFO [stderr]     Checking bitflags v0.8.0
Dec 19 14:40:14.878 INFO [stderr]    Compiling backtrace-sys v0.1.10
Dec 19 14:40:14.879 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 19 14:40:14.889 INFO [stderr]     Checking futures v0.1.10
Dec 19 14:40:14.889 INFO [stderr]     Checking base64 v0.4.0
Dec 19 14:40:14.889 INFO [stderr]     Checking serde_json v0.9.9
Dec 19 14:40:14.889 INFO [stderr]     Checking mio v0.6.4
Dec 19 14:40:15.288 INFO [stderr]     Checking clap v2.21.1
Dec 19 14:40:17.319 INFO [stderr]     Checking tokio-service v0.1.0
Dec 19 14:40:17.329 INFO [stderr]     Checking tokio-core v0.1.4
Dec 19 14:40:18.540 INFO [stderr]     Checking tokio-proto v0.1.0
Dec 19 14:40:30.437 INFO [stderr]     Checking backtrace v0.3.0
Dec 19 14:40:31.143 INFO [stderr]     Checking error-chain v0.10.0
Dec 19 14:40:31.628 INFO [stderr]     Checking roam v0.1.0 (/opt/crater/workdir)
Dec 19 14:40:32.736 INFO [stderr] warning: method is never used: `to_json`
Dec 19 14:40:32.736 INFO [stderr]   --> src/network_config.rs:52:5
Dec 19 14:40:32.737 INFO [stderr]    |
Dec 19 14:40:32.737 INFO [stderr] 52 |     pub fn to_json(&self) -> Result<String> {
Dec 19 14:40:32.737 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 14:40:32.738 INFO [stderr]    |
Dec 19 14:40:32.738 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 14:40:32.738 INFO [stderr] 
Dec 19 14:40:32.739 INFO [stderr] warning: method is never used: `to_pretty_json`
Dec 19 14:40:32.739 INFO [stderr]   --> src/network_config.rs:56:5
Dec 19 14:40:32.739 INFO [stderr]    |
Dec 19 14:40:32.739 INFO [stderr] 56 |     pub fn to_pretty_json(&self) -> Result<String> {
Dec 19 14:40:32.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 14:40:32.740 INFO [stderr] 
Dec 19 14:40:32.929 INFO [stderr] warning: method is never used: `to_pretty_json`
Dec 19 14:40:32.929 INFO [stderr]   --> src/network_config.rs:56:5
Dec 19 14:40:32.929 INFO [stderr]    |
Dec 19 14:40:32.930 INFO [stderr] 56 |     pub fn to_pretty_json(&self) -> Result<String> {
Dec 19 14:40:32.930 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 14:40:32.930 INFO [stderr]    |
Dec 19 14:40:32.930 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 14:40:32.931 INFO [stderr] 
Dec 19 14:40:32.979 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.25s
Dec 19 14:40:34.307 INFO running `"docker" "inspect" "b2b5a509712bbc5d7a2eb05beaed291f864761c8c9db8234666d4eb701efea9f"`
Dec 19 14:40:34.664 INFO running `"docker" "rm" "-f" "b2b5a509712bbc5d7a2eb05beaed291f864761c8c9db8234666d4eb701efea9f"`
Dec 19 14:40:34.988 INFO [stdout] b2b5a509712bbc5d7a2eb05beaed291f864761c8c9db8234666d4eb701efea9f