[INFO] crate quickbacktrack 0.5.0 is already in cache
[INFO] extracting crate quickbacktrack 0.5.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/quickbacktrack/0.5.0
[INFO] extracting crate quickbacktrack 0.5.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/quickbacktrack/0.5.0
[INFO] validating manifest of quickbacktrack-0.5.0 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 quickbacktrack-0.5.0 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 quickbacktrack-0.5.0
[INFO] finished frobbing quickbacktrack-0.5.0
[INFO] frobbed toml for quickbacktrack-0.5.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/quickbacktrack/0.5.0/Cargo.toml
[INFO] started frobbing quickbacktrack-0.5.0
[INFO] finished frobbing quickbacktrack-0.5.0
[INFO] frobbed toml for quickbacktrack-0.5.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/quickbacktrack/0.5.0/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] [stderr]     Blocking waiting for file lock on package cache
[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 quickbacktrack-0.5.0 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/quickbacktrack/0.5.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2a26c0728bac5f253a2585129aed8942c59ea3390c4ea0bce8ade99979633a2a
[INFO] running `"docker" "start" "-a" "2a26c0728bac5f253a2585129aed8942c59ea3390c4ea0bce8ade99979633a2a"`
[INFO] [stderr]    Compiling quickbacktrack v0.5.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "2a26c0728bac5f253a2585129aed8942c59ea3390c4ea0bce8ade99979633a2a"`
[INFO] running `"docker" "rm" "-f" "2a26c0728bac5f253a2585129aed8942c59ea3390c4ea0bce8ade99979633a2a"`
[INFO] [stdout] 2a26c0728bac5f253a2585129aed8942c59ea3390c4ea0bce8ade99979633a2a
[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/quickbacktrack/0.5.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] aeaa0f99237bb347bac80653d571de1300c673cc5fedd6a1cc14209a212f55aa
[INFO] running `"docker" "start" "-a" "aeaa0f99237bb347bac80653d571de1300c673cc5fedd6a1cc14209a212f55aa"`
[INFO] [stderr]    Compiling quickbacktrack v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `PartialOrd` is imported redundantly
[INFO] [stderr]    --> examples/tsp.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |             use std::cmp::PartialOrd;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.00s
[INFO] running `"docker" "inspect" "aeaa0f99237bb347bac80653d571de1300c673cc5fedd6a1cc14209a212f55aa"`
[INFO] running `"docker" "rm" "-f" "aeaa0f99237bb347bac80653d571de1300c673cc5fedd6a1cc14209a212f55aa"`
[INFO] [stdout] aeaa0f99237bb347bac80653d571de1300c673cc5fedd6a1cc14209a212f55aa
[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/quickbacktrack/0.5.0:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] b81df88e1ccb8d7e0231624a248640e3768327fc49f80f0b21f6a1fe08dcfb7d
[INFO] running `"docker" "start" "-a" "b81df88e1ccb8d7e0231624a248640e3768327fc49f80f0b21f6a1fe08dcfb7d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/quickbacktrack-b1693f459148ddd1
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests quickbacktrack
[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] [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" "b81df88e1ccb8d7e0231624a248640e3768327fc49f80f0b21f6a1fe08dcfb7d"`
[INFO] running `"docker" "rm" "-f" "b81df88e1ccb8d7e0231624a248640e3768327fc49f80f0b21f6a1fe08dcfb7d"`
[INFO] [stdout] b81df88e1ccb8d7e0231624a248640e3768327fc49f80f0b21f6a1fe08dcfb7d