[INFO] crate proptest 0.9.4 is already in cache
[INFO] extracting crate proptest 0.9.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/proptest/0.9.4
[INFO] extracting crate proptest 0.9.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/proptest/0.9.4
[INFO] validating manifest of proptest-0.9.4 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 proptest-0.9.4 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 proptest-0.9.4
[INFO] finished frobbing proptest-0.9.4
[INFO] frobbed toml for proptest-0.9.4 written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/reg/proptest/0.9.4/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 proptest-0.9.4 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-0/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/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] a4edf73c610cd60c6296beb24626ad624618c152e647a6800a7415f31a9f879c
[INFO] running `"docker" "start" "-a" "a4edf73c610cd60c6296beb24626ad624618c152e647a6800a7415f31a9f879c"`
[INFO] [stderr]    Compiling proptest v0.9.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.10s
[INFO] running `"docker" "inspect" "a4edf73c610cd60c6296beb24626ad624618c152e647a6800a7415f31a9f879c"`
[INFO] running `"docker" "rm" "-f" "a4edf73c610cd60c6296beb24626ad624618c152e647a6800a7415f31a9f879c"`
[INFO] [stdout] a4edf73c610cd60c6296beb24626ad624618c152e647a6800a7415f31a9f879c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] ab002c6a3c3d6ed19694f4a1df426328975094bb7f717eeb4f8d08c97b2b0f39
[INFO] running `"docker" "start" "-a" "ab002c6a3c3d6ed19694f4a1df426328975094bb7f717eeb4f8d08c97b2b0f39"`
[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=2ba4302e6cfcc5ef -C extra-filename=-2ba4302e6cfcc5ef --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern bit_set=/opt/crater/target/debug/deps/libbit_set-089248f87181368e.rlib --extern bitflags=/opt/crater/target/debug/deps/libbitflags-c2b055ef483e7b37.rlib --extern byteorder=/opt/crater/target/debug/deps/libbyteorder-280e4e0876ba1dc5.rlib --extern lazy_static=/opt/crater/target/debug/deps/liblazy_static-1f7a4359e40a6da9.rlib --extern num_traits=/opt/crater/target/debug/deps/libnum_traits-c6be473ace7ca4de.rlib --extern quick_error=/opt/crater/target/debug/deps/libquick_error-f50ea951eae373ef.rlib --extern rand=/opt/crater/target/debug/deps/librand-937c257eedcbc81e.rlib --extern rand_chacha=/opt/crater/target/debug/deps/librand_chacha-1b9e58560472e74b.rlib --extern rand_xorshift=/opt/crater/target/debug/deps/librand_xorshift-aba648178ccafa60.rlib --extern regex=/opt/crater/target/debug/deps/libregex-2f54045970e77773.rlib --extern regex_syntax=/opt/crater/target/debug/deps/libregex_syntax-bd99c61924ee7656.rlib --extern rusty_fork=/opt/crater/target/debug/deps/librusty_fork-6d2b4ba06a1538ab.rlib --extern tempfile=/opt/crater/target/debug/deps/libtempfile-b29d5749da4bbd9d.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "ab002c6a3c3d6ed19694f4a1df426328975094bb7f717eeb4f8d08c97b2b0f39"`
[INFO] running `"docker" "rm" "-f" "ab002c6a3c3d6ed19694f4a1df426328975094bb7f717eeb4f8d08c97b2b0f39"`
[INFO] [stdout] ab002c6a3c3d6ed19694f4a1df426328975094bb7f717eeb4f8d08c97b2b0f39