[INFO] fetching crate circular 0.3.0...
[INFO] extracting crate circular 0.3.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/circular/0.3.0
[INFO] extracting crate circular 0.3.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/circular/0.3.0
[INFO] validating manifest of circular-0.3.0 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 circular-0.3.0 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 circular-0.3.0
[INFO] finished frobbing circular-0.3.0
[INFO] frobbed toml for circular-0.3.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/circular/0.3.0/Cargo.toml
[INFO] started frobbing circular-0.3.0
[INFO] finished frobbing circular-0.3.0
[INFO] frobbed toml for circular-0.3.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/circular/0.3.0/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 circular-0.3.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/circular/0.3.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 64baa6a7857c5ef294f03037f4c5d6f9ea7e67af6d06996dbd18c315b7ea6233
[INFO] running `"docker" "start" "-a" "64baa6a7857c5ef294f03037f4c5d6f9ea7e67af6d06996dbd18c315b7ea6233"`
[INFO] [stderr]    Compiling circular v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "64baa6a7857c5ef294f03037f4c5d6f9ea7e67af6d06996dbd18c315b7ea6233"`
[INFO] running `"docker" "rm" "-f" "64baa6a7857c5ef294f03037f4c5d6f9ea7e67af6d06996dbd18c315b7ea6233"`
[INFO] [stdout] 64baa6a7857c5ef294f03037f4c5d6f9ea7e67af6d06996dbd18c315b7ea6233
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/circular/0.3.0:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ea3d51a626b65fb8d227b8c94ae1e2c41890fd6055a300224979523d92dc03de
[INFO] running `"docker" "start" "-a" "ea3d51a626b65fb8d227b8c94ae1e2c41890fd6055a300224979523d92dc03de"`
[INFO] [stderr]    Compiling circular v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]    --> src/lib.rs:397:7
[INFO] [stderr]     |
[INFO] [stderr] 397 |   use std::str;
[INFO] [stderr]     |       ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "ea3d51a626b65fb8d227b8c94ae1e2c41890fd6055a300224979523d92dc03de"`
[INFO] running `"docker" "rm" "-f" "ea3d51a626b65fb8d227b8c94ae1e2c41890fd6055a300224979523d92dc03de"`
[INFO] [stdout] ea3d51a626b65fb8d227b8c94ae1e2c41890fd6055a300224979523d92dc03de
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/circular/0.3.0:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 319d079a8a8f72dd7a156965ac5a8747c88a2dc89d9e6d03d637bd5d464e9020
[INFO] running `"docker" "start" "-a" "319d079a8a8f72dd7a156965ac5a8747c88a2dc89d9e6d03d637bd5d464e9020"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/circular-3cd4e60fcf6099d8
[INFO] [stderr]    Doc-tests circular
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::delete ... ok
[INFO] [stdout] test tests::consume_without_shift ... ok
[INFO] [stdout] test tests::fill_and_consume ... ok
[INFO] [stdout] test tests::replace ... ok
[INFO] [stdout] test tests::set_position ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - Buffer::position (line 173) ... ok
[INFO] [stdout] test src/lib.rs -  (line 15) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "319d079a8a8f72dd7a156965ac5a8747c88a2dc89d9e6d03d637bd5d464e9020"`
[INFO] running `"docker" "rm" "-f" "319d079a8a8f72dd7a156965ac5a8747c88a2dc89d9e6d03d637bd5d464e9020"`
[INFO] [stdout] 319d079a8a8f72dd7a156965ac5a8747c88a2dc89d9e6d03d637bd5d464e9020