[INFO] fetching crate slacs-core 0.0.0...
[INFO] extracting crate slacs-core 0.0.0 into work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/slacs-core/0.0.0
[INFO] extracting crate slacs-core 0.0.0 into work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/slacs-core/0.0.0
[INFO] validating manifest of slacs-core-0.0.0 on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of slacs-core-0.0.0 on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing slacs-core-0.0.0
[INFO] finished frobbing slacs-core-0.0.0
[INFO] frobbed toml for slacs-core-0.0.0 written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/slacs-core/0.0.0/Cargo.toml
[INFO] started frobbing slacs-core-0.0.0
[INFO] finished frobbing slacs-core-0.0.0
[INFO] frobbed toml for slacs-core-0.0.0 written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/slacs-core/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xi-rope v0.1.1
[INFO] [stderr]   Downloaded slog-term v0.7.0
[INFO] [stderr]   Downloaded slog-json v0.7.0
[INFO] [stderr]   Downloaded slog-serde v0.7.0
[INFO] [stderr]   Downloaded slog v0.7.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing slacs-core-0.0.0 against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-3/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/slacs-core/0.0.0:/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=forbid" "-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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] dfd2505b1379052166aecc24ec871f3261ab5358fcbf64e66352713cdb3ff8a0
[INFO] running `"docker" "start" "-a" "dfd2505b1379052166aecc24ec871f3261ab5358fcbf64e66352713cdb3ff8a0"`
[INFO] [stderr]    Compiling bytecount v0.1.7
[INFO] [stderr]    Compiling gapbuffer v0.1.1
[INFO] [stderr]    Compiling xi-unicode v0.0.1
[INFO] [stderr]    Compiling error-chain v0.2.2
[INFO] [stderr]    Compiling xi-rope v0.1.1
[INFO] [stderr]    Compiling slog v0.7.0
[INFO] [stderr]    Compiling slog-serde v0.7.0
[INFO] [stderr]    Compiling slog-term v0.7.0
[INFO] [stderr]    Compiling slog-json v0.7.0
[INFO] [stderr]    Compiling slacs-core v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `MarkPosition`
[INFO] [stderr]   --> src/slacs/marks.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct MarkPosition {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/slacs/marks.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new() -> MarkPosition {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cursor`
[INFO] [stderr]   --> src/slacs/marks.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     Cursor(usize),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DisplayMark`
[INFO] [stderr]   --> src/slacs/marks.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     DisplayMark(usize),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.95s
[INFO] running `"docker" "inspect" "dfd2505b1379052166aecc24ec871f3261ab5358fcbf64e66352713cdb3ff8a0"`
[INFO] running `"docker" "rm" "-f" "dfd2505b1379052166aecc24ec871f3261ab5358fcbf64e66352713cdb3ff8a0"`
[INFO] [stdout] dfd2505b1379052166aecc24ec871f3261ab5358fcbf64e66352713cdb3ff8a0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-3/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/slacs-core/0.0.0:/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=forbid" "-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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9ae090da01e7873c41d4b07a61ddc19ef1fa80267f47095eac5a412b63189878
[INFO] running `"docker" "start" "-a" "9ae090da01e7873c41d4b07a61ddc19ef1fa80267f47095eac5a412b63189878"`
[INFO] [stderr]    Compiling slacs-core v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `MarkPosition`
[INFO] [stderr]   --> src/slacs/marks.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct MarkPosition {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/slacs/marks.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new() -> MarkPosition {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cursor`
[INFO] [stderr]   --> src/slacs/marks.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     Cursor(usize),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DisplayMark`
[INFO] [stderr]   --> src/slacs/marks.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     DisplayMark(usize),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "9ae090da01e7873c41d4b07a61ddc19ef1fa80267f47095eac5a412b63189878"`
[INFO] running `"docker" "rm" "-f" "9ae090da01e7873c41d4b07a61ddc19ef1fa80267f47095eac5a412b63189878"`
[INFO] [stdout] 9ae090da01e7873c41d4b07a61ddc19ef1fa80267f47095eac5a412b63189878
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-3/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/slacs-core/0.0.0:/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=forbid" "-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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] 3265b2fd185aad9ecd5b7961072d47062afbf9fe778488c941fd403fd1530a69
[INFO] running `"docker" "start" "-a" "3265b2fd185aad9ecd5b7961072d47062afbf9fe778488c941fd403fd1530a69"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/slacs-0f82b4b08ab7d60d
[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" "3265b2fd185aad9ecd5b7961072d47062afbf9fe778488c941fd403fd1530a69"`
[INFO] running `"docker" "rm" "-f" "3265b2fd185aad9ecd5b7961072d47062afbf9fe778488c941fd403fd1530a69"`
[INFO] [stdout] 3265b2fd185aad9ecd5b7961072d47062afbf9fe778488c941fd403fd1530a69