[INFO] crate singleton 0.2.2 is already in cache
[INFO] extracting crate singleton 0.2.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/singleton/0.2.2
[INFO] extracting crate singleton 0.2.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/singleton/0.2.2
[INFO] validating manifest of singleton-0.2.2 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 singleton-0.2.2 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 singleton-0.2.2
[INFO] finished frobbing singleton-0.2.2
[INFO] frobbed toml for singleton-0.2.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/singleton/0.2.2/Cargo.toml
[INFO] started frobbing singleton-0.2.2
[INFO] finished frobbing singleton-0.2.2
[INFO] frobbed toml for singleton-0.2.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/singleton/0.2.2/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 singleton-0.2.2 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-6/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/singleton/0.2.2:/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] ad4539ae2a65cf426ef7f971a3603b260f9d631dd984372a599f5de6ec087c4a
[INFO] running `"docker" "start" "-a" "ad4539ae2a65cf426ef7f971a3603b260f9d631dd984372a599f5de6ec087c4a"`
[INFO] [stderr]    Compiling singleton v0.2.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "ad4539ae2a65cf426ef7f971a3603b260f9d631dd984372a599f5de6ec087c4a"`
[INFO] running `"docker" "rm" "-f" "ad4539ae2a65cf426ef7f971a3603b260f9d631dd984372a599f5de6ec087c4a"`
[INFO] [stdout] ad4539ae2a65cf426ef7f971a3603b260f9d631dd984372a599f5de6ec087c4a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/singleton/0.2.2:/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] ada04dc6ecfdb127630dbb0c947ea8b358125549c0835856444dc123d9eb50b6
[INFO] running `"docker" "start" "-a" "ada04dc6ecfdb127630dbb0c947ea8b358125549c0835856444dc123d9eb50b6"`
[INFO] [stderr]    Compiling singleton v0.2.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "ada04dc6ecfdb127630dbb0c947ea8b358125549c0835856444dc123d9eb50b6"`
[INFO] running `"docker" "rm" "-f" "ada04dc6ecfdb127630dbb0c947ea8b358125549c0835856444dc123d9eb50b6"`
[INFO] [stdout] ada04dc6ecfdb127630dbb0c947ea8b358125549c0835856444dc123d9eb50b6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/singleton/0.2.2:/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] 73381c10c1516ec5eb7a9fec4bd1cbaf46481b72dd5b7e944df70c1e2a98512d
[INFO] running `"docker" "start" "-a" "73381c10c1516ec5eb7a9fec4bd1cbaf46481b72dd5b7e944df70c1e2a98512d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/singleton-4fa39bf6a2e9718f
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test singleton::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/trial-c7a3601b9c62c50a
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests singleton
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "73381c10c1516ec5eb7a9fec4bd1cbaf46481b72dd5b7e944df70c1e2a98512d"`
[INFO] running `"docker" "rm" "-f" "73381c10c1516ec5eb7a9fec4bd1cbaf46481b72dd5b7e944df70c1e2a98512d"`
[INFO] [stdout] 73381c10c1516ec5eb7a9fec4bd1cbaf46481b72dd5b7e944df70c1e2a98512d