[INFO] crate proptest 0.9.4 is already in cache
[INFO] extracting crate proptest 0.9.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/proptest/0.9.4
[INFO] extracting crate proptest 0.9.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/proptest/0.9.4
[INFO] validating manifest of proptest-0.9.4 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of proptest-0.9.4 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing proptest-0.9.4
[INFO] finished frobbing proptest-0.9.4
[INFO] frobbed toml for proptest-0.9.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/proptest/0.9.4/Cargo.toml
[INFO] started frobbing proptest-0.9.4
[INFO] finished frobbing proptest-0.9.4
[INFO] frobbed toml for proptest-0.9.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/proptest/0.9.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing proptest-0.9.4 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/proptest/0.9.4:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] edc302ebde685623d6dc48f27b4dd25af66731ba0345e4fd3ef32a917a881489
[INFO] running `"docker" "start" "-a" "edc302ebde685623d6dc48f27b4dd25af66731ba0345e4fd3ef32a917a881489"`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling proptest v0.9.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.08s
[INFO] running `"docker" "inspect" "edc302ebde685623d6dc48f27b4dd25af66731ba0345e4fd3ef32a917a881489"`
[INFO] running `"docker" "rm" "-f" "edc302ebde685623d6dc48f27b4dd25af66731ba0345e4fd3ef32a917a881489"`
[INFO] [stdout] edc302ebde685623d6dc48f27b4dd25af66731ba0345e4fd3ef32a917a881489
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/proptest/0.9.4:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] ee807e16f9ca315190de37e83fb2e0d942025d7c7f6db6ce8396ffc48d2f3a97
[INFO] running `"docker" "start" "-a" "ee807e16f9ca315190de37e83fb2e0d942025d7c7f6db6ce8396ffc48d2f3a97"`
[INFO] [stderr]    Compiling proptest v0.9.4 (/opt/crater/workdir)
[INFO] [stderr] error: Could not compile `proptest`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --edition=2018 --crate-name proptest src/lib.rs --color never --emit=dep-info,link -C debuginfo=2 --test --cfg 'feature="bit-set"' --cfg 'feature="break-dead-code"' --cfg 'feature="default"' --cfg 'feature="fork"' --cfg 'feature="lazy_static"' --cfg 'feature="quick-error"' --cfg 'feature="regex-syntax"' --cfg 'feature="rusty-fork"' --cfg 'feature="std"' --cfg 'feature="tempfile"' --cfg 'feature="timeout"' -C metadata=958f0f55abfb7fd1 -C extra-filename=-958f0f55abfb7fd1 --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern bit_set=/opt/crater/target/debug/deps/libbit_set-469736b20aa8bbf5.rlib --extern bitflags=/opt/crater/target/debug/deps/libbitflags-1f73faaef27177be.rlib --extern byteorder=/opt/crater/target/debug/deps/libbyteorder-a504153c825b841d.rlib --extern lazy_static=/opt/crater/target/debug/deps/liblazy_static-6a4e8ea56a445919.rlib --extern num_traits=/opt/crater/target/debug/deps/libnum_traits-d92e46de8754cc8f.rlib --extern quick_error=/opt/crater/target/debug/deps/libquick_error-7d23d7c8e4749989.rlib --extern rand=/opt/crater/target/debug/deps/librand-caae2c6cd70400c9.rlib --extern rand_chacha=/opt/crater/target/debug/deps/librand_chacha-1b8e39b253389048.rlib --extern rand_xorshift=/opt/crater/target/debug/deps/librand_xorshift-5e391b21601b8393.rlib --extern regex=/opt/crater/target/debug/deps/libregex-6683e124b2894695.rlib --extern regex_syntax=/opt/crater/target/debug/deps/libregex_syntax-df3af46a51d0ff63.rlib --extern rusty_fork=/opt/crater/target/debug/deps/librusty_fork-db6f6e086f9b2f6f.rlib --extern tempfile=/opt/crater/target/debug/deps/libtempfile-e781ec017eb3d2e3.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "ee807e16f9ca315190de37e83fb2e0d942025d7c7f6db6ce8396ffc48d2f3a97"`
[INFO] running `"docker" "rm" "-f" "ee807e16f9ca315190de37e83fb2e0d942025d7c7f6db6ce8396ffc48d2f3a97"`
[INFO] [stdout] ee807e16f9ca315190de37e83fb2e0d942025d7c7f6db6ce8396ffc48d2f3a97