[INFO] updating cached repository jhwagner/rust_by_example_solutions
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jhwagner/rust_by_example_solutions
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jhwagner/rust_by_example_solutions" "work/ex/beta-1.37-6/sources/1.36.0/gh/jhwagner/rust_by_example_solutions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jhwagner/rust_by_example_solutions'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jhwagner/rust_by_example_solutions" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0aa32a7b0d6eca03e6ce044479a9b11f80e49c0c
[INFO] sha for GitHub repo jhwagner/rust_by_example_solutions: 0aa32a7b0d6eca03e6ce044479a9b11f80e49c0c
[INFO] validating manifest of jhwagner/rust_by_example_solutions 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 jhwagner/rust_by_example_solutions 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 jhwagner/rust_by_example_solutions
[INFO] finished frobbing jhwagner/rust_by_example_solutions
[INFO] frobbed toml for jhwagner/rust_by_example_solutions written to work/ex/beta-1.37-6/sources/1.36.0/gh/jhwagner/rust_by_example_solutions/Cargo.toml
[INFO] started frobbing jhwagner/rust_by_example_solutions
[INFO] finished frobbing jhwagner/rust_by_example_solutions
[INFO] frobbed toml for jhwagner/rust_by_example_solutions written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions/Cargo.toml
[INFO] crate jhwagner/rust_by_example_solutions already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jhwagner/rust_by_example_solutions against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 60d6a0dd37559cdd97b3bab1783eb23d4301b6e8430a8ba48409182154928ebb
[INFO] running `"docker" "start" "-a" "60d6a0dd37559cdd97b3bab1783eb23d4301b6e8430a8ba48409182154928ebb"`
[INFO] [stderr]    Compiling rust_by_example_solutions v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Structure`
[INFO] [stderr]   --> src/bin/1_2_0_formatted_print.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     struct Structure(i32);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `"docker" "inspect" "60d6a0dd37559cdd97b3bab1783eb23d4301b6e8430a8ba48409182154928ebb"`
[INFO] running `"docker" "rm" "-f" "60d6a0dd37559cdd97b3bab1783eb23d4301b6e8430a8ba48409182154928ebb"`
[INFO] [stdout] 60d6a0dd37559cdd97b3bab1783eb23d4301b6e8430a8ba48409182154928ebb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 47369e35c15bf288c3da4e121c7493d3a47e4d914f8c91d2c1ec2bd42d5af8b0
[INFO] running `"docker" "start" "-a" "47369e35c15bf288c3da4e121c7493d3a47e4d914f8c91d2c1ec2bd42d5af8b0"`
[INFO] [stderr]    Compiling rust_by_example_solutions v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `"docker" "inspect" "47369e35c15bf288c3da4e121c7493d3a47e4d914f8c91d2c1ec2bd42d5af8b0"`
[INFO] running `"docker" "rm" "-f" "47369e35c15bf288c3da4e121c7493d3a47e4d914f8c91d2c1ec2bd42d5af8b0"`
[INFO] [stdout] 47369e35c15bf288c3da4e121c7493d3a47e4d914f8c91d2c1ec2bd42d5af8b0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jhwagner/rust_by_example_solutions:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 0fc93d8e266b43d752c6b3df178ceee4bdc254058709e96698b72860b5eccdd0
[INFO] running `"docker" "start" "-a" "0fc93d8e266b43d752c6b3df178ceee4bdc254058709e96698b72860b5eccdd0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_0_0_hello_world-3bf1789b3d4c6fcc
[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] [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] [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]      Running /opt/crater/target/debug/deps/1_2_0_formatted_print-7e3b8d62cfe3c656
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_2_2_display-4cbdd0036f099085
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_2_3_formatting-0512da203005886c
[INFO] [stderr]      Running /opt/crater/target/debug/deps/2_2_0_tuples-3a572ffabe2e7cff
[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] [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" "0fc93d8e266b43d752c6b3df178ceee4bdc254058709e96698b72860b5eccdd0"`
[INFO] running `"docker" "rm" "-f" "0fc93d8e266b43d752c6b3df178ceee4bdc254058709e96698b72860b5eccdd0"`
[INFO] [stdout] 0fc93d8e266b43d752c6b3df178ceee4bdc254058709e96698b72860b5eccdd0