[INFO] crate nyar-collatz 0.1.0 is already in cache
[INFO] extracting crate nyar-collatz 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/nyar-collatz/0.1.0
[INFO] extracting crate nyar-collatz 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nyar-collatz/0.1.0
[INFO] validating manifest of nyar-collatz-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 nyar-collatz-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 nyar-collatz-0.1.0
[INFO] finished frobbing nyar-collatz-0.1.0
[INFO] frobbed toml for nyar-collatz-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/nyar-collatz/0.1.0/Cargo.toml
[INFO] started frobbing nyar-collatz-0.1.0
[INFO] finished frobbing nyar-collatz-0.1.0
[INFO] frobbed toml for nyar-collatz-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nyar-collatz/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 nyar-collatz-0.1.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nyar-collatz/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 85e8efb0262940f43a359d1ca1409a6d257a191cf93279d25d2115636aa1a457
[INFO] running `"docker" "start" "-a" "85e8efb0262940f43a359d1ca1409a6d257a191cf93279d25d2115636aa1a457"`
[INFO] [stderr]    Compiling nyar-collatz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "85e8efb0262940f43a359d1ca1409a6d257a191cf93279d25d2115636aa1a457"`
[INFO] running `"docker" "rm" "-f" "85e8efb0262940f43a359d1ca1409a6d257a191cf93279d25d2115636aa1a457"`
[INFO] [stdout] 85e8efb0262940f43a359d1ca1409a6d257a191cf93279d25d2115636aa1a457
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nyar-collatz/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0dd6061962b2c5f31a0e77056020b28006e35ca2e3badcbd544e6769297aec79
[INFO] running `"docker" "start" "-a" "0dd6061962b2c5f31a0e77056020b28006e35ca2e3badcbd544e6769297aec79"`
[INFO] [stderr]    Compiling nyar-collatz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "0dd6061962b2c5f31a0e77056020b28006e35ca2e3badcbd544e6769297aec79"`
[INFO] running `"docker" "rm" "-f" "0dd6061962b2c5f31a0e77056020b28006e35ca2e3badcbd544e6769297aec79"`
[INFO] [stdout] 0dd6061962b2c5f31a0e77056020b28006e35ca2e3badcbd544e6769297aec79
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nyar-collatz/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4468ece2741e95b049ca9a272924eb6de067f3dac809c2230fa442b30458382d
[INFO] running `"docker" "start" "-a" "4468ece2741e95b049ca9a272924eb6de067f3dac809c2230fa442b30458382d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/collatz-87d8ff3b1748d83e
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test collatz64::test::collatz_13 ... ok
[INFO] [stdout] test collatz64::test::test_longest_collatz_memo ... ok
[INFO] [stdout] test collatz64::test::test_longest_collatz ... ok
[INFO] [stdout] test collatz::test::collatz_13 ... ok
[INFO] [stdout] test collatz64::test::collatz_0 ... ok
[INFO] [stdout] test collatz::test::collatz_0 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests collatz
[INFO] [stderr] error[E0659]: `collatz` is ambiguous (name vs any other name during import resolution)
[INFO] [stderr]  --> /opt/crater/workdir/src/lib.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub use collatz::Collatz;
[INFO] [stderr]   |         ^^^^^^^ ambiguous name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `collatz` could refer to an extern crate passed with `--extern`
[INFO] [stderr]   = help: use `::collatz` to refer to this extern crate unambiguously
[INFO] [stderr] note: `collatz` could also refer to the module defined here
[INFO] [stderr]  --> /opt/crater/workdir/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub mod collatz;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   = help: use `crate::collatz` to refer to this module unambiguously
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0659`.
[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" "4468ece2741e95b049ca9a272924eb6de067f3dac809c2230fa442b30458382d"`
[INFO] running `"docker" "rm" "-f" "4468ece2741e95b049ca9a272924eb6de067f3dac809c2230fa442b30458382d"`
[INFO] [stdout] 4468ece2741e95b049ca9a272924eb6de067f3dac809c2230fa442b30458382d