Dec 19 20:42:13.118 INFO checking alexcrichton/l4c against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 20:42:13.118 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/alexcrichton/l4c:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 20:42:13.281 INFO [stdout] bd5d53e200fb83534db63e532bcd97c6ca12acc19858b6d90137141dff15c5bf
Dec 19 20:42:13.286 INFO running `"docker" "start" "-a" "bd5d53e200fb83534db63e532bcd97c6ca12acc19858b6d90137141dff15c5bf"`
Dec 19 20:42:13.947 INFO [stderr]     Checking wait-timeout v0.1.5
Dec 19 20:42:13.947 INFO [stderr]     Checking log v0.4.5
Dec 19 20:42:14.255 INFO [stderr]     Checking driver v0.1.0 (/opt/crater/workdir/driver)
Dec 19 20:42:14.337 INFO [stderr]     Checking env_logger v0.5.13
Dec 19 20:42:14.988 INFO [stderr] warning: field is never used: `retry`
Dec 19 20:42:14.988 INFO [stderr]   --> driver/src/main.rs:33:5
Dec 19 20:42:14.988 INFO [stderr]    |
Dec 19 20:42:14.988 INFO [stderr] 33 |     retry: bool,
Dec 19 20:42:14.988 INFO [stderr]    |     ^^^^^^^^^^^
Dec 19 20:42:14.988 INFO [stderr]    |
Dec 19 20:42:14.988 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 20:42:14.988 INFO [stderr] 
Dec 19 20:42:15.072 INFO [stderr] warning: field is never used: `retry`
Dec 19 20:42:15.073 INFO [stderr]   --> driver/src/main.rs:33:5
Dec 19 20:42:15.073 INFO [stderr]    |
Dec 19 20:42:15.073 INFO [stderr] 33 |     retry: bool,
Dec 19 20:42:15.076 INFO [stderr]    |     ^^^^^^^^^^^
Dec 19 20:42:15.076 INFO [stderr]    |
Dec 19 20:42:15.076 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 20:42:15.076 INFO [stderr] 
Dec 19 20:42:15.255 INFO [stderr]     Checking l4c v0.0.0 (/opt/crater/workdir)
Dec 19 20:42:17.476 INFO [stderr] warning: unused import: `Display`
Dec 19 20:42:17.476 INFO [stderr]  --> src/front/pp.rs:1:16
Dec 19 20:42:17.476 INFO [stderr]   |
Dec 19 20:42:17.477 INFO [stderr] 1 | use std::fmt::{Display, Write};
Dec 19 20:42:17.477 INFO [stderr]   |                ^^^^^^^
Dec 19 20:42:17.477 INFO [stderr]   |
Dec 19 20:42:17.478 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 20:42:17.478 INFO [stderr] 
Dec 19 20:42:17.503 INFO [stderr] warning: unused import: `Display`
Dec 19 20:42:17.504 INFO [stderr]  --> src/front/pp.rs:1:16
Dec 19 20:42:17.504 INFO [stderr]   |
Dec 19 20:42:17.504 INFO [stderr] 1 | use std::fmt::{Display, Write};
Dec 19 20:42:17.504 INFO [stderr]   |                ^^^^^^^
Dec 19 20:42:17.505 INFO [stderr]   |
Dec 19 20:42:17.505 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 20:42:17.505 INFO [stderr] 
Dec 19 20:42:19.011 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.10s
Dec 19 20:42:19.733 INFO running `"docker" "inspect" "bd5d53e200fb83534db63e532bcd97c6ca12acc19858b6d90137141dff15c5bf"`
Dec 19 20:42:19.892 INFO running `"docker" "rm" "-f" "bd5d53e200fb83534db63e532bcd97c6ca12acc19858b6d90137141dff15c5bf"`
Dec 19 20:42:20.072 INFO [stdout] bd5d53e200fb83534db63e532bcd97c6ca12acc19858b6d90137141dff15c5bf