[INFO] crate rusty-santa 0.1.0 is already in cache
[INFO] extracting crate rusty-santa 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-santa/0.1.0
[INFO] extracting crate rusty-santa 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusty-santa/0.1.0
[INFO] validating manifest of rusty-santa-0.1.0 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 rusty-santa-0.1.0 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 rusty-santa-0.1.0
[INFO] finished frobbing rusty-santa-0.1.0
[INFO] frobbed toml for rusty-santa-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-santa/0.1.0/Cargo.toml
[INFO] started frobbing rusty-santa-0.1.0
[INFO] finished frobbing rusty-santa-0.1.0
[INFO] frobbed toml for rusty-santa-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusty-santa/0.1.0/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] 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] [stderr]     Blocking waiting for file lock on package cache
[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" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing rusty-santa-0.1.0 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-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/reg/rusty-santa/0.1.0:/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] 7df5709b3cccdbb6063244cf668cd510421ab680d676eccc97bcf550abf4d3f4
[INFO] running `"docker" "start" "-a" "7df5709b3cccdbb6063244cf668cd510421ab680d676eccc97bcf550abf4d3f4"`
[INFO] [stderr]    Compiling rusty-santa v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/lib.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn get(&self, x: &str, y: &str) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `size`
[INFO] [stderr]    --> src/lib.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn size(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "7df5709b3cccdbb6063244cf668cd510421ab680d676eccc97bcf550abf4d3f4"`
[INFO] running `"docker" "rm" "-f" "7df5709b3cccdbb6063244cf668cd510421ab680d676eccc97bcf550abf4d3f4"`
[INFO] [stdout] 7df5709b3cccdbb6063244cf668cd510421ab680d676eccc97bcf550abf4d3f4
[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/reg/rusty-santa/0.1.0:/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] f4f3b2cdf80c158fe5d83de90a1564be7f19dc2dc000ee636c1f5cc419cc2908
[INFO] running `"docker" "start" "-a" "f4f3b2cdf80c158fe5d83de90a1564be7f19dc2dc000ee636c1f5cc419cc2908"`
[INFO] [stderr]    Compiling rusty-santa v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:357:13
[INFO] [stderr]     |
[INFO] [stderr] 357 |         for i in 0..1000 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:279:13
[INFO] [stderr]     |
[INFO] [stderr] 279 |         let mut matrix = Matrix::new(keys);
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:358:13
[INFO] [stderr]     |
[INFO] [stderr] 358 |             group.assign();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `"docker" "inspect" "f4f3b2cdf80c158fe5d83de90a1564be7f19dc2dc000ee636c1f5cc419cc2908"`
[INFO] running `"docker" "rm" "-f" "f4f3b2cdf80c158fe5d83de90a1564be7f19dc2dc000ee636c1f5cc419cc2908"`
[INFO] [stdout] f4f3b2cdf80c158fe5d83de90a1564be7f19dc2dc000ee636c1f5cc419cc2908
[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/reg/rusty-santa/0.1.0:/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] 5da330e7a01eaeb9a719cf63a8fed918ec091668f73e6e2ebf8b0eb59a614afd
[INFO] running `"docker" "start" "-a" "5da330e7a01eaeb9a719cf63a8fed918ec091668f73e6e2ebf8b0eb59a614afd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_santa-9017f49f712b5623
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::matrix_size ... ok
[INFO] [stdout] test tests::matrix_set ... ok
[INFO] [stdout] test tests::matrix_get_row ... ok
[INFO] [stdout] test tests::matrix_contains ... ok
[INFO] [stdout] test tests::group_simple ... ok
[INFO] [stdout] test tests::matrix_init ... ok
[INFO] [stdout] test tests::group_may_fail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rusty-santa
[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" "5da330e7a01eaeb9a719cf63a8fed918ec091668f73e6e2ebf8b0eb59a614afd"`
[INFO] running `"docker" "rm" "-f" "5da330e7a01eaeb9a719cf63a8fed918ec091668f73e6e2ebf8b0eb59a614afd"`
[INFO] [stdout] 5da330e7a01eaeb9a719cf63a8fed918ec091668f73e6e2ebf8b0eb59a614afd