Dec 19 04:37:22.457 INFO checking zhaihj/rust-play-ground against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 04:37:22.457 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/zhaihj/rust-play-ground:/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 04:37:22.780 INFO [stdout] 188a49059e64ac96a92940e8ef0f375189c06ea27a5311071f34edda6b537524
Dec 19 04:37:22.782 INFO running `"docker" "start" "-a" "188a49059e64ac96a92940e8ef0f375189c06ea27a5311071f34edda6b537524"`
Dec 19 04:37:24.652 INFO [stderr]     Checking libc v0.2.19
Dec 19 04:37:24.652 INFO [stderr]     Checking rustc-serialize v0.3.22
Dec 19 04:37:24.652 INFO [stderr]     Checking byteorder v1.0.0
Dec 19 04:37:26.368 INFO [stderr]     Checking memchr v1.0.1
Dec 19 04:37:30.160 INFO [stderr]     Checking csv v0.15.0
Dec 19 04:37:30.868 INFO [stderr]     Checking csv-read-test v0.1.0 (/opt/crater/workdir)
Dec 19 04:37:31.208 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:37:31.208 INFO [stderr]  --> src/bin/read-csv-matrix.rs:8:5
Dec 19 04:37:31.208 INFO [stderr]   |
Dec 19 04:37:31.208 INFO [stderr] 8 |     f.read_to_string(&mut s);
Dec 19 04:37:31.208 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:37:31.210 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:37:31.210 INFO [stderr]  --> src/bin/read-csv-matrix.rs:8:5
Dec 19 04:37:31.210 INFO [stderr]   |
Dec 19 04:37:31.210 INFO [stderr] 8 |     f.read_to_string(&mut s);
Dec 19 04:37:31.210 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:37:31.210 INFO [stderr]   |
Dec 19 04:37:31.210 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 04:37:31.210 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:37:31.210 INFO [stderr] 
Dec 19 04:37:31.210 INFO [stderr]   |
Dec 19 04:37:31.210 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 04:37:31.210 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:37:31.210 INFO [stderr] 
Dec 19 04:37:31.257 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.65s
Dec 19 04:37:32.444 INFO running `"docker" "inspect" "188a49059e64ac96a92940e8ef0f375189c06ea27a5311071f34edda6b537524"`
Dec 19 04:37:32.762 INFO running `"docker" "rm" "-f" "188a49059e64ac96a92940e8ef0f375189c06ea27a5311071f34edda6b537524"`
Dec 19 04:37:33.140 INFO [stdout] 188a49059e64ac96a92940e8ef0f375189c06ea27a5311071f34edda6b537524