Dec 11 09:57:03.514 INFO checking scottwillmoore/rust-primer against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 09:57:03.514 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 09:57:04.085 INFO [stdout] 18f040966a85880d59156cfb1fb9940809616ed975ecd134f245906dd5f0e75a
Dec 11 09:57:04.087 INFO running `"docker" "start" "-a" "18f040966a85880d59156cfb1fb9940809616ed975ecd134f245906dd5f0e75a"`
Dec 11 09:57:06.995 INFO [stderr] usermod: no changes
Dec 11 09:57:07.169 INFO [stderr]     Checking libc v0.2.39
Dec 11 09:57:07.170 INFO [stderr]     Checking serde v1.0.33
Dec 11 09:57:07.208 INFO [stderr]    Compiling serde_derive_internals v0.21.0
Dec 11 09:57:10.328 INFO [stderr]     Checking memchr v2.0.1
Dec 11 09:57:11.697 INFO [stderr]     Checking aho-corasick v0.6.4
Dec 11 09:57:13.761 INFO [stderr]    Compiling serde_derive v1.0.33
Dec 11 09:57:14.032 INFO [stderr]     Checking regex v0.2.10
Dec 11 09:57:28.343 INFO [stderr]     Checking docopt v0.8.3
Dec 11 09:57:29.846 INFO [stderr]     Checking primer v0.1.0 (/source)
Dec 11 09:57:30.332 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 09:57:30.333 INFO [stderr]  --> src/lib.rs:1:12
Dec 11 09:57:30.333 INFO [stderr]   |
Dec 11 09:57:30.333 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 09:57:30.333 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 09:57:30.334 INFO [stderr]   |
Dec 11 09:57:30.334 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 09:57:30.334 INFO [stderr] 
Dec 11 09:57:30.532 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 09:57:30.532 INFO [stderr]  --> src/lib.rs:1:12
Dec 11 09:57:30.532 INFO [stderr]   |
Dec 11 09:57:30.532 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 09:57:30.532 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 09:57:30.532 INFO [stderr]   |
Dec 11 09:57:30.532 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 09:57:30.532 INFO [stderr] 
Dec 11 09:57:31.769 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.74s
Dec 11 09:57:31.784 INFO [stderr] su: No module specific data is present
Dec 11 09:57:33.416 INFO running `"docker" "inspect" "18f040966a85880d59156cfb1fb9940809616ed975ecd134f245906dd5f0e75a"`
Dec 11 09:57:33.772 INFO running `"docker" "rm" "-f" "18f040966a85880d59156cfb1fb9940809616ed975ecd134f245906dd5f0e75a"`
Dec 11 09:57:34.176 INFO [stdout] 18f040966a85880d59156cfb1fb9940809616ed975ecd134f245906dd5f0e75a