Dec 19 18:16:27.603 INFO checking davidbarsky/trace-prototype against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 18:16:27.603 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/davidbarsky/trace-prototype:/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 18:16:28.104 INFO [stdout] 5551697a83cc46a14f83da9b7f1d785ec683dc71d5bba86b4e9894704d99cfd4
Dec 19 18:16:28.106 INFO running `"docker" "start" "-a" "5551697a83cc46a14f83da9b7f1d785ec683dc71d5bba86b4e9894704d99cfd4"`
Dec 19 18:16:29.197 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Dec 19 18:16:29.376 INFO [stderr]     Checking parking_lot v0.6.3
Dec 19 18:16:29.380 INFO [stderr]     Checking crossbeam-deque v0.5.2
Dec 19 18:16:30.305 INFO [stderr]     Checking crossbeam-channel v0.2.4
Dec 19 18:16:31.296 INFO [stderr]     Checking crossbeam v0.4.1
Dec 19 18:16:32.002 INFO [stderr]     Checking trace-prototype v0.1.0 (/opt/crater/workdir)
Dec 19 18:16:32.818 INFO [stderr] warning: unused import: `channel`
Dec 19 18:16:32.818 INFO [stderr]   --> src/main.rs:15:17
Dec 19 18:16:32.819 INFO [stderr]    |
Dec 19 18:16:32.819 INFO [stderr] 15 | use crossbeam::{channel, queue::SegQueue, Receiver, Sender};
Dec 19 18:16:32.820 INFO [stderr]    |                 ^^^^^^^
Dec 19 18:16:32.820 INFO [stderr]    |
Dec 19 18:16:32.820 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 18:16:32.820 INFO [stderr] 
Dec 19 18:16:32.876 INFO [stderr] warning: unused import: `channel`
Dec 19 18:16:32.876 INFO [stderr]   --> src/main.rs:15:17
Dec 19 18:16:32.876 INFO [stderr]    |
Dec 19 18:16:32.876 INFO [stderr] 15 | use crossbeam::{channel, queue::SegQueue, Receiver, Sender};
Dec 19 18:16:32.877 INFO [stderr]    |                 ^^^^^^^
Dec 19 18:16:32.877 INFO [stderr]    |
Dec 19 18:16:32.877 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 18:16:32.877 INFO [stderr] 
Dec 19 18:16:32.948 INFO [stderr] warning: type alias is never used: `Channels`
Dec 19 18:16:32.948 INFO [stderr]   --> src/main.rs:36:1
Dec 19 18:16:32.948 INFO [stderr]    |
Dec 19 18:16:32.949 INFO [stderr] 36 | type Channels = Vec<(Sender<Span>, Receiver<Span>)>;
Dec 19 18:16:32.949 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:16:32.949 INFO [stderr]    |
Dec 19 18:16:32.949 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 18:16:32.949 INFO [stderr] 
Dec 19 18:16:32.949 INFO [stderr] warning: struct is never constructed: `Super`
Dec 19 18:16:32.949 INFO [stderr]   --> src/main.rs:37:1
Dec 19 18:16:32.955 INFO [stderr]    |
Dec 19 18:16:32.955 INFO [stderr] 37 | struct Super {
Dec 19 18:16:32.955 INFO [stderr]    | ^^^^^^^^^^^^
Dec 19 18:16:32.955 INFO [stderr] 
Dec 19 18:16:32.955 INFO [stderr] warning: method is never used: `new`
Dec 19 18:16:32.955 INFO [stderr]   --> src/main.rs:43:5
Dec 19 18:16:32.955 INFO [stderr]    |
Dec 19 18:16:32.955 INFO [stderr] 43 |     fn new(queue: SegQueue<Span>, channels: Channels) -> Self {
Dec 19 18:16:32.955 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:16:32.956 INFO [stderr] 
Dec 19 18:16:33.042 INFO [stderr] warning: type alias is never used: `Channels`
Dec 19 18:16:33.042 INFO [stderr]   --> src/main.rs:36:1
Dec 19 18:16:33.042 INFO [stderr]    |
Dec 19 18:16:33.042 INFO [stderr] 36 | type Channels = Vec<(Sender<Span>, Receiver<Span>)>;
Dec 19 18:16:33.042 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:16:33.042 INFO [stderr]    |
Dec 19 18:16:33.042 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 18:16:33.042 INFO [stderr] 
Dec 19 18:16:33.042 INFO [stderr] warning: struct is never constructed: `Super`
Dec 19 18:16:33.042 INFO [stderr]   --> src/main.rs:37:1
Dec 19 18:16:33.042 INFO [stderr]    |
Dec 19 18:16:33.043 INFO [stderr] 37 | struct Super {
Dec 19 18:16:33.048 INFO [stderr]    | ^^^^^^^^^^^^
Dec 19 18:16:33.048 INFO [stderr] 
Dec 19 18:16:33.048 INFO [stderr] warning: method is never used: `new`
Dec 19 18:16:33.048 INFO [stderr]   --> src/main.rs:43:5
Dec 19 18:16:33.048 INFO [stderr]    |
Dec 19 18:16:33.048 INFO [stderr] 43 |     fn new(queue: SegQueue<Span>, channels: Channels) -> Self {
Dec 19 18:16:33.048 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:16:33.048 INFO [stderr] 
Dec 19 18:16:33.084 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.91s
Dec 19 18:16:33.853 INFO running `"docker" "inspect" "5551697a83cc46a14f83da9b7f1d785ec683dc71d5bba86b4e9894704d99cfd4"`
Dec 19 18:16:34.044 INFO running `"docker" "rm" "-f" "5551697a83cc46a14f83da9b7f1d785ec683dc71d5bba86b4e9894704d99cfd4"`
Dec 19 18:16:34.298 INFO [stdout] 5551697a83cc46a14f83da9b7f1d785ec683dc71d5bba86b4e9894704d99cfd4