[INFO] crate powersoftau 0.1.0 is already in cache
[INFO] extracting crate powersoftau 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/powersoftau/0.1.0
[INFO] extracting crate powersoftau 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/powersoftau/0.1.0
[INFO] validating manifest of powersoftau-0.1.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of powersoftau-0.1.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing powersoftau-0.1.0
[INFO] finished frobbing powersoftau-0.1.0
[INFO] frobbed toml for powersoftau-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/powersoftau/0.1.0/Cargo.toml
[INFO] started frobbing powersoftau-0.1.0
[INFO] finished frobbing powersoftau-0.1.0
[INFO] frobbed toml for powersoftau-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/powersoftau/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing powersoftau-0.1.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/powersoftau/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] e5348915e4ae13102f03920e627cedea4b7fe5bc1d30c40349f8a9766a3f64eb
[INFO] running `"docker" "start" "-a" "e5348915e4ae13102f03920e627cedea4b7fe5bc1d30c40349f8a9766a3f64eb"`
[INFO] [stderr]    Compiling digest v0.6.2
[INFO] [stderr]    Compiling crypto-mac v0.4.0
[INFO] [stderr]    Compiling pairing v0.13.2
[INFO] [stderr]    Compiling blake2 v0.6.1
[INFO] [stderr]    Compiling powersoftau v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Arc` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:664:21
[INFO] [stderr]     |
[INFO] [stderr] 44  | use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                 --- the item `Arc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 664 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Mutex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:664:26
[INFO] [stderr]     |
[INFO] [stderr] 44  | use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                      ----- the item `Mutex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 664 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                          ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.01s
[INFO] running `"docker" "inspect" "e5348915e4ae13102f03920e627cedea4b7fe5bc1d30c40349f8a9766a3f64eb"`
[INFO] running `"docker" "rm" "-f" "e5348915e4ae13102f03920e627cedea4b7fe5bc1d30c40349f8a9766a3f64eb"`
[INFO] [stdout] e5348915e4ae13102f03920e627cedea4b7fe5bc1d30c40349f8a9766a3f64eb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/powersoftau/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] ed82a0f312e2f344dd72f43bde187d77c93612c8a9ed6394d6735f6e9f9d4e55
[INFO] running `"docker" "start" "-a" "ed82a0f312e2f344dd72f43bde187d77c93612c8a9ed6394d6735f6e9f9d4e55"`
[INFO] [stderr]    Compiling powersoftau v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Arc` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:664:21
[INFO] [stderr]     |
[INFO] [stderr] 44  | use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                 --- the item `Arc` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 664 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Mutex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:664:26
[INFO] [stderr]     |
[INFO] [stderr] 44  | use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                      ----- the item `Mutex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 664 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                          ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
[INFO] running `"docker" "inspect" "ed82a0f312e2f344dd72f43bde187d77c93612c8a9ed6394d6735f6e9f9d4e55"`
[INFO] running `"docker" "rm" "-f" "ed82a0f312e2f344dd72f43bde187d77c93612c8a9ed6394d6735f6e9f9d4e55"`
[INFO] [stdout] ed82a0f312e2f344dd72f43bde187d77c93612c8a9ed6394d6735f6e9f9d4e55
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/powersoftau/0.1.0:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 5d587ddf9d513bf54468bd367b42ae09269d00a9b561cec8a423009f4d78b785
[INFO] running `"docker" "start" "-a" "5d587ddf9d513bf54468bd367b42ae09269d00a9b561cec8a423009f4d78b785"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/powersoftau-4b97a3cb548d1051
[INFO] [stdout] test test_same_ratio ... ok
[INFO] [stdout] test test_hash_to_g2 ... ok
[INFO] [stdout] test test_pubkey_serialization ... ok
[INFO] [stderr] error: process didn't exit successfully: `/opt/crater/target/debug/deps/powersoftau-4b97a3cb548d1051` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "5d587ddf9d513bf54468bd367b42ae09269d00a9b561cec8a423009f4d78b785"`
[INFO] running `"docker" "rm" "-f" "5d587ddf9d513bf54468bd367b42ae09269d00a9b561cec8a423009f4d78b785"`
[INFO] [stdout] 5d587ddf9d513bf54468bd367b42ae09269d00a9b561cec8a423009f4d78b785