Dec 18 03:19:40.866 INFO checking bielr/biotrees-rs against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 03:19:40.866 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/bielr/biotrees-rs:/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 18 03:19:41.339 INFO [stdout] 6e3cb39da70c4768a5bd135e8f84e84b6f28eec64688f7aee739815ab07f63df
Dec 18 03:19:41.339 INFO running `"docker" "start" "-a" "6e3cb39da70c4768a5bd135e8f84e84b6f28eec64688f7aee739815ab07f63df"`
Dec 18 03:19:42.960 INFO [stderr]     Checking lock_api v0.1.5
Dec 18 03:19:42.960 INFO [stderr]     Checking crossbeam-epoch v0.3.1
Dec 18 03:19:43.826 INFO [stderr]     Checking parking_lot v0.6.4
Dec 18 03:19:44.177 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 18 03:19:44.796 INFO [stderr]     Checking rayon-core v1.4.1
Dec 18 03:19:44.806 INFO [stderr]     Checking once_cell v0.1.6
Dec 18 03:19:45.308 INFO [stderr]     Checking cached v0.8.0
Dec 18 03:19:46.087 INFO [stderr]     Checking rayon v1.0.3
Dec 18 03:19:50.043 INFO [stderr]     Checking biotrees v0.1.0 (/opt/crater/workdir)
Dec 18 03:19:52.034 INFO [stderr] warning: function is never used: `sym_desc_half`
Dec 18 03:19:52.034 INFO [stderr]   --> examples/enum_balance.rs:10:1
Dec 18 03:19:52.034 INFO [stderr]    |
Dec 18 03:19:52.034 INFO [stderr] 10 | fn sym_desc_half(t: &Shape) -> u32 {
Dec 18 03:19:52.034 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:19:52.034 INFO [stderr]    |
Dec 18 03:19:52.034 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 03:19:52.034 INFO [stderr] 
Dec 18 03:19:52.040 INFO [stderr] warning: function is never used: `sym_desc`
Dec 18 03:19:52.040 INFO [stderr]   --> examples/enum_balance.rs:29:1
Dec 18 03:19:52.040 INFO [stderr]    |
Dec 18 03:19:52.040 INFO [stderr] 29 | fn sym_desc(t: &Shape) -> u32 {
Dec 18 03:19:52.041 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:19:52.041 INFO [stderr] 
Dec 18 03:19:52.041 INFO [stderr] warning: function is never used: `depth_avg`
Dec 18 03:19:52.041 INFO [stderr]   --> examples/enum_balance.rs:48:1
Dec 18 03:19:52.041 INFO [stderr]    |
Dec 18 03:19:52.041 INFO [stderr] 48 | fn depth_avg<T>(t: &Phylo<T>) -> f64 {
Dec 18 03:19:52.041 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:19:52.041 INFO [stderr] 
Dec 18 03:19:52.041 INFO [stderr] warning: function is never used: `depth_var`
Dec 18 03:19:52.041 INFO [stderr]   --> examples/enum_balance.rs:55:1
Dec 18 03:19:52.044 INFO [stderr]    |
Dec 18 03:19:52.044 INFO [stderr] 55 | fn depth_var<T>(t: &Phylo<T>) -> f64 {
Dec 18 03:19:52.044 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:19:52.044 INFO [stderr] 
Dec 18 03:19:52.067 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.25s
Dec 18 03:19:53.007 INFO running `"docker" "inspect" "6e3cb39da70c4768a5bd135e8f84e84b6f28eec64688f7aee739815ab07f63df"`
Dec 18 03:19:53.364 INFO running `"docker" "rm" "-f" "6e3cb39da70c4768a5bd135e8f84e84b6f28eec64688f7aee739815ab07f63df"`
Dec 18 03:19:53.641 INFO [stdout] 6e3cb39da70c4768a5bd135e8f84e84b6f28eec64688f7aee739815ab07f63df