[INFO] crate piston_mix_economy 0.2.0 is already in cache
[INFO] extracting crate piston_mix_economy 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/piston_mix_economy/0.2.0
[INFO] extracting crate piston_mix_economy 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/piston_mix_economy/0.2.0
[INFO] validating manifest of piston_mix_economy-0.2.0 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 piston_mix_economy-0.2.0 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 piston_mix_economy-0.2.0
[INFO] finished frobbing piston_mix_economy-0.2.0
[INFO] frobbed toml for piston_mix_economy-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/piston_mix_economy/0.2.0/Cargo.toml
[INFO] started frobbing piston_mix_economy-0.2.0
[INFO] finished frobbing piston_mix_economy-0.2.0
[INFO] frobbed toml for piston_mix_economy-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/piston_mix_economy/0.2.0/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 piston_mix_economy-0.2.0 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-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/piston_mix_economy/0.2.0:/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] 525b3eb6655c97c99bf06e1ec1401a596d62e7622580b2beb7c873ba8e21b710
[INFO] running `"docker" "start" "-a" "525b3eb6655c97c99bf06e1ec1401a596d62e7622580b2beb7c873ba8e21b710"`
[INFO] [stderr]    Compiling piston_mix_economy v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "525b3eb6655c97c99bf06e1ec1401a596d62e7622580b2beb7c873ba8e21b710"`
[INFO] running `"docker" "rm" "-f" "525b3eb6655c97c99bf06e1ec1401a596d62e7622580b2beb7c873ba8e21b710"`
[INFO] [stdout] 525b3eb6655c97c99bf06e1ec1401a596d62e7622580b2beb7c873ba8e21b710
[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/piston_mix_economy/0.2.0:/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] 8f125a543f9b84c7d3dd21decf5bb59930bacd1d2e113656f7ef10e0a6843d2c
[INFO] running `"docker" "start" "-a" "8f125a543f9b84c7d3dd21decf5bb59930bacd1d2e113656f7ef10e0a6843d2c"`
[INFO] [stderr]    Compiling piston-float v0.2.0
[INFO] [stderr]    Compiling piston-shaders_graphics2d v0.2.1
[INFO] [stderr]    Compiling wayland-scanner v0.5.11
[INFO] [stderr]    Compiling gfx_core v0.4.0
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling glutin v0.6.2
[INFO] [stderr]    Compiling png v0.5.2
[INFO] [stderr]    Compiling wayland-sys v0.5.11
[INFO] [stderr]    Compiling piston-viewport v0.2.0
[INFO] [stderr]    Compiling vecmath v0.2.0
[INFO] [stderr]    Compiling pistoncore-input v0.14.0
[INFO] [stderr]    Compiling piston2d-graphics v0.17.3
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling wayland-client v0.5.12
[INFO] [stderr]    Compiling pistoncore-window v0.22.1
[INFO] [stderr]    Compiling piston-timer_controller v0.6.0
[INFO] [stderr]    Compiling pistoncore-event_loop v0.25.1
[INFO] [stderr]    Compiling image v0.10.4
[INFO] [stderr]    Compiling piston v0.25.1
[INFO] [stderr]    Compiling wayland-window v0.2.3
[INFO] [stderr]    Compiling wayland-kbd v0.3.6
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.30.0
[INFO] [stderr]    Compiling gfx v0.12.2
[INFO] [stderr]    Compiling gfx_device_gl v0.11.2
[INFO] [stderr]    Compiling piston-gfx_texture v0.17.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.31.2
[INFO] [stderr]    Compiling piston_window v0.53.0
[INFO] [stderr]    Compiling piston_mix_economy v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `min_tax_2`
[INFO] [stderr]   --> examples/random_transactions_solver.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     min_tax_2: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 52.32s
[INFO] running `"docker" "inspect" "8f125a543f9b84c7d3dd21decf5bb59930bacd1d2e113656f7ef10e0a6843d2c"`
[INFO] running `"docker" "rm" "-f" "8f125a543f9b84c7d3dd21decf5bb59930bacd1d2e113656f7ef10e0a6843d2c"`
[INFO] [stdout] 8f125a543f9b84c7d3dd21decf5bb59930bacd1d2e113656f7ef10e0a6843d2c
[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/piston_mix_economy/0.2.0:/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] 68c7f62e87cb22a9bee7a8eec48a47e71e0adef6f3e8198af4d99bbba30d7bbe
[INFO] running `"docker" "start" "-a" "68c7f62e87cb22a9bee7a8eec48a47e71e0adef6f3e8198af4d99bbba30d7bbe"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/piston_mix_economy-526b66c4a0303363
[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 piston_mix_economy
[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" "68c7f62e87cb22a9bee7a8eec48a47e71e0adef6f3e8198af4d99bbba30d7bbe"`
[INFO] running `"docker" "rm" "-f" "68c7f62e87cb22a9bee7a8eec48a47e71e0adef6f3e8198af4d99bbba30d7bbe"`
[INFO] [stdout] 68c7f62e87cb22a9bee7a8eec48a47e71e0adef6f3e8198af4d99bbba30d7bbe