Dec 19 10:49:43.638 INFO checking poanetwork/poa-ballot-stats against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:49:43.638 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/poanetwork/poa-ballot-stats:/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 10:49:44.317 INFO [stdout] 79a05fd3aaffcb8f967b417d75157880168df07c12bc972d4c30e7cedbcbba2e
Dec 19 10:49:44.322 INFO running `"docker" "start" "-a" "79a05fd3aaffcb8f967b417d75157880168df07c12bc972d4c30e7cedbcbba2e"`
Dec 19 10:49:46.177 INFO [stderr]    Compiling heapsize v0.4.2
Dec 19 10:49:46.177 INFO [stderr]    Compiling crunchy v0.1.6
Dec 19 10:49:46.183 INFO [stderr]     Checking rustc-hex v2.0.1
Dec 19 10:49:46.188 INFO [stderr]    Compiling rustc-demangle v0.1.9
Dec 19 10:49:46.196 INFO [stderr]     Checking ethabi-contract v6.0.0
Dec 19 10:49:46.196 INFO [stderr]     Checking arrayvec v0.4.8
Dec 19 10:49:46.196 INFO [stderr]    Compiling backtrace-sys v0.1.24
Dec 19 10:49:46.749 INFO [stderr]     Checking regex-syntax v0.5.6
Dec 19 10:49:49.078 INFO [stderr]     Checking tokio-timer v0.1.2
Dec 19 10:49:49.081 INFO [stderr]    Compiling serde v1.0.82
Dec 19 10:49:49.153 INFO [stderr]     Checking time v0.1.40
Dec 19 10:49:49.188 INFO [stderr]    Compiling rand v0.4.3
Dec 19 10:49:49.446 INFO [stderr]     Checking ethereum-types-serialize v0.2.1
Dec 19 10:49:50.530 INFO [stderr]     Checking num-bigint v0.1.44
Dec 19 10:49:50.657 INFO [stderr]     Checking crossbeam-epoch v0.6.1
Dec 19 10:49:51.420 INFO [stderr]     Checking tiny-keccak v1.4.2
Dec 19 10:49:52.888 INFO [stderr]     Checking mio-uds v0.6.7
Dec 19 10:49:54.444 INFO [stderr] error[E0119]: conflicting implementations of trait `HeapSizeOf` for type `std::vec::Vec<std::rc::Rc<_>>`:
Dec 19 10:49:54.444 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/heapsize-0.4.2/src/lib.rs:245:1
Dec 19 10:49:54.444 INFO [stderr]     |
Dec 19 10:49:54.444 INFO [stderr] 228 | impl<T: HeapSizeOf> HeapSizeOf for Vec<T> {
Dec 19 10:49:54.444 INFO [stderr]     | ----------------------------------------- first implementation here
Dec 19 10:49:54.444 INFO [stderr] ...
Dec 19 10:49:54.444 INFO [stderr] 245 | impl<T> HeapSizeOf for Vec<Rc<T>> {
Dec 19 10:49:54.444 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `std::vec::Vec<std::rc::Rc<_>>`
Dec 19 10:49:54.444 INFO [stderr]     |
Dec 19 10:49:54.444 INFO [stderr]     = note: downstream crates may implement trait `HeapSizeOf` for type `std::rc::Rc<_>`
Dec 19 10:49:54.444 INFO [stderr] 
Dec 19 10:49:54.444 INFO [stderr] error: aborting due to previous error
Dec 19 10:49:54.444 INFO [stderr] 
Dec 19 10:49:54.444 INFO [stderr] For more information about this error, try `rustc --explain E0119`.
Dec 19 10:49:54.452 INFO [stderr] error: Could not compile `heapsize`.
Dec 19 10:49:54.452 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 10:50:07.420 INFO [stderr] error: build failed
Dec 19 10:50:08.585 INFO running `"docker" "inspect" "79a05fd3aaffcb8f967b417d75157880168df07c12bc972d4c30e7cedbcbba2e"`
Dec 19 10:50:08.980 INFO running `"docker" "rm" "-f" "79a05fd3aaffcb8f967b417d75157880168df07c12bc972d4c30e7cedbcbba2e"`
Dec 19 10:50:09.284 INFO [stdout] 79a05fd3aaffcb8f967b417d75157880168df07c12bc972d4c30e7cedbcbba2e