[INFO] updating cached repository ivgur/ipv6_sort
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ivgur/ipv6_sort
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ivgur/ipv6_sort" "work/ex/beta-1.38-1/sources/1.37.0/gh/ivgur/ipv6_sort"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ivgur/ipv6_sort'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ivgur/ipv6_sort" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f8ec3810897c981e666451187da2279e0f1ec074
[INFO] sha for GitHub repo ivgur/ipv6_sort: f8ec3810897c981e666451187da2279e0f1ec074
[INFO] validating manifest of ivgur/ipv6_sort 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 ivgur/ipv6_sort 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 ivgur/ipv6_sort
[INFO] finished frobbing ivgur/ipv6_sort
[INFO] frobbed toml for ivgur/ipv6_sort written to work/ex/beta-1.38-1/sources/1.37.0/gh/ivgur/ipv6_sort/Cargo.toml
[INFO] started frobbing ivgur/ipv6_sort
[INFO] finished frobbing ivgur/ipv6_sort
[INFO] frobbed toml for ivgur/ipv6_sort written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort/Cargo.toml
[INFO] crate ivgur/ipv6_sort already has a lockfile, it will not be regenerated
[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 ivgur/ipv6_sort 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-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort:/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] 39bc8618de21f0e67117da5e6612f97ee3ae5fce69d8c6cc5fc4f902718fd6f3
[INFO] running `"docker" "start" "-a" "39bc8618de21f0e67117da5e6612f97ee3ae5fce69d8c6cc5fc4f902718fd6f3"`
[INFO] [stderr]    Compiling ipv6_sort v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output_file`
[INFO] [stderr]   --> src/main.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let output_file = &args[2];
[INFO] [stderr]    |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_output_file`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "39bc8618de21f0e67117da5e6612f97ee3ae5fce69d8c6cc5fc4f902718fd6f3"`
[INFO] running `"docker" "rm" "-f" "39bc8618de21f0e67117da5e6612f97ee3ae5fce69d8c6cc5fc4f902718fd6f3"`
[INFO] [stdout] 39bc8618de21f0e67117da5e6612f97ee3ae5fce69d8c6cc5fc4f902718fd6f3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort:/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] 97601dfc3bdc510c0bc4b5abf5439741fc506951196d9c8dcc08444d1003cdcf
[INFO] running `"docker" "start" "-a" "97601dfc3bdc510c0bc4b5abf5439741fc506951196d9c8dcc08444d1003cdcf"`
[INFO] [stderr]    Compiling ipv6_sort v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output_file`
[INFO] [stderr]   --> src/main.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let output_file = &args[2];
[INFO] [stderr]    |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_output_file`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "97601dfc3bdc510c0bc4b5abf5439741fc506951196d9c8dcc08444d1003cdcf"`
[INFO] running `"docker" "rm" "-f" "97601dfc3bdc510c0bc4b5abf5439741fc506951196d9c8dcc08444d1003cdcf"`
[INFO] [stdout] 97601dfc3bdc510c0bc4b5abf5439741fc506951196d9c8dcc08444d1003cdcf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivgur/ipv6_sort:/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] 5ee2fe2041907aff5c18e918398c80fec270e916e85324462664728d96763721
[INFO] running `"docker" "start" "-a" "5ee2fe2041907aff5c18e918398c80fec270e916e85324462664728d96763721"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ipv6_sort-3261956c3afe0426
[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" "5ee2fe2041907aff5c18e918398c80fec270e916e85324462664728d96763721"`
[INFO] running `"docker" "rm" "-f" "5ee2fe2041907aff5c18e918398c80fec270e916e85324462664728d96763721"`
[INFO] [stdout] 5ee2fe2041907aff5c18e918398c80fec270e916e85324462664728d96763721