[INFO] updating cached repository octavioturra/rustracker
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/octavioturra/rustracker
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/octavioturra/rustracker" "work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/octavioturra/rustracker" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/octavioturra/rustracker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/octavioturra/rustracker'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 109f3a9950836bffea5cff81125114a9a055b80d
[INFO] sha for GitHub repo octavioturra/rustracker: 109f3a9950836bffea5cff81125114a9a055b80d
[INFO] validating manifest of octavioturra/rustracker 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 octavioturra/rustracker 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 octavioturra/rustracker
[INFO] finished frobbing octavioturra/rustracker
[INFO] frobbed toml for octavioturra/rustracker written to work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker/Cargo.toml
[INFO] started frobbing octavioturra/rustracker
[INFO] finished frobbing octavioturra/rustracker
[INFO] frobbed toml for octavioturra/rustracker written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/octavioturra/rustracker/Cargo.toml
[INFO] crate octavioturra/rustracker 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 octavioturra/rustracker against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e7e0f63b21486fd61cf7507786ebdf68c0a7ce5ad75f0c522f14f09ee56cd89a
[INFO] running `"docker" "start" "-a" "e7e0f63b21486fd61cf7507786ebdf68c0a7ce5ad75f0c522f14f09ee56cd89a"`
[INFO] [stderr]    Compiling gcc v0.3.50
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling rustracker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/main.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let mut last = None;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `traverse`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn traverse<'a>(block: &'a Block) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.74s
[INFO] running `"docker" "inspect" "e7e0f63b21486fd61cf7507786ebdf68c0a7ce5ad75f0c522f14f09ee56cd89a"`
[INFO] running `"docker" "rm" "-f" "e7e0f63b21486fd61cf7507786ebdf68c0a7ce5ad75f0c522f14f09ee56cd89a"`
[INFO] [stdout] e7e0f63b21486fd61cf7507786ebdf68c0a7ce5ad75f0c522f14f09ee56cd89a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7436e8eb25e2e7a097ff9ac47c9c679211e150043f57b37d6cc2a2fc9f1f6fe3
[INFO] running `"docker" "start" "-a" "7436e8eb25e2e7a097ff9ac47c9c679211e150043f57b37d6cc2a2fc9f1f6fe3"`
[INFO] [stderr]    Compiling rustracker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `last` is never read
[INFO] [stderr]    --> src/main.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let mut last = None;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `traverse`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn traverse<'a>(block: &'a Block) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "7436e8eb25e2e7a097ff9ac47c9c679211e150043f57b37d6cc2a2fc9f1f6fe3"`
[INFO] running `"docker" "rm" "-f" "7436e8eb25e2e7a097ff9ac47c9c679211e150043f57b37d6cc2a2fc9f1f6fe3"`
[INFO] [stdout] 7436e8eb25e2e7a097ff9ac47c9c679211e150043f57b37d6cc2a2fc9f1f6fe3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/octavioturra/rustracker:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 0816924e505d913733509024aa8def213a7b3157dc7f59a3e73ebc3bca893ee2
[INFO] running `"docker" "start" "-a" "0816924e505d913733509024aa8def213a7b3157dc7f59a3e73ebc3bca893ee2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustracker-ec3dbcbf635053a4
[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" "0816924e505d913733509024aa8def213a7b3157dc7f59a3e73ebc3bca893ee2"`
[INFO] running `"docker" "rm" "-f" "0816924e505d913733509024aa8def213a7b3157dc7f59a3e73ebc3bca893ee2"`
[INFO] [stdout] 0816924e505d913733509024aa8def213a7b3157dc7f59a3e73ebc3bca893ee2