Dec 17 15:54:57.433 INFO checking scottwillmoore/rust-primer against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:54:57.433 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/scottwillmoore/rust-primer:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:54:57.947 INFO [stdout] 592454e8facd274578721704a574afc300f840227e03dc8bc5f686439c354a1d
Dec 17 15:54:57.950 INFO running `"docker" "start" "-a" "592454e8facd274578721704a574afc300f840227e03dc8bc5f686439c354a1d"`
Dec 17 15:54:59.772 INFO [stderr]     Checking libc v0.2.39
Dec 17 15:54:59.812 INFO [stderr]    Compiling serde_derive_internals v0.21.0
Dec 17 15:55:01.544 INFO [stderr]     Checking memchr v2.0.1
Dec 17 15:55:02.016 INFO [stderr]     Checking aho-corasick v0.6.4
Dec 17 15:55:04.559 INFO [stderr]     Checking regex v0.2.10
Dec 17 15:55:04.658 INFO [stderr]    Compiling serde_derive v1.0.33
Dec 17 15:55:13.741 INFO [stderr]     Checking docopt v0.8.3
Dec 17 15:55:15.007 INFO [stderr]     Checking primer v0.1.0 (/opt/crater/workdir)
Dec 17 15:55:15.364 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 15:55:15.364 INFO [stderr]  --> src/lib.rs:1:12
Dec 17 15:55:15.364 INFO [stderr]   |
Dec 17 15:55:15.364 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 17 15:55:15.364 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 15:55:15.364 INFO [stderr]   |
Dec 17 15:55:15.364 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 15:55:15.364 INFO [stderr] 
Dec 17 15:55:15.528 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 15:55:15.529 INFO [stderr]  --> src/lib.rs:1:12
Dec 17 15:55:15.529 INFO [stderr]   |
Dec 17 15:55:15.529 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 17 15:55:15.530 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 15:55:15.530 INFO [stderr]   |
Dec 17 15:55:15.530 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 15:55:15.530 INFO [stderr] 
Dec 17 15:55:16.361 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.68s
Dec 17 15:55:17.945 INFO running `"docker" "inspect" "592454e8facd274578721704a574afc300f840227e03dc8bc5f686439c354a1d"`
Dec 17 15:55:18.316 INFO running `"docker" "rm" "-f" "592454e8facd274578721704a574afc300f840227e03dc8bc5f686439c354a1d"`
Dec 17 15:55:18.620 INFO [stdout] 592454e8facd274578721704a574afc300f840227e03dc8bc5f686439c354a1d