[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 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-2/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/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 46d0968907412310d497b6ff766d8ada54599b54efb1dab7e006aab9c81ae793
[INFO] running `"docker" "start" "-a" "46d0968907412310d497b6ff766d8ada54599b54efb1dab7e006aab9c81ae793"`
[INFO] [stderr]    Compiling thread-id v3.1.0
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling regex v0.2.2
[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 19.60s
[INFO] running `"docker" "inspect" "46d0968907412310d497b6ff766d8ada54599b54efb1dab7e006aab9c81ae793"`
[INFO] running `"docker" "rm" "-f" "46d0968907412310d497b6ff766d8ada54599b54efb1dab7e006aab9c81ae793"`
[INFO] [stdout] 46d0968907412310d497b6ff766d8ada54599b54efb1dab7e006aab9c81ae793
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] f537bd0fcbe631228165c052dc71c2a8e49a9484049e2d2d5a865386e9ba8e68
[INFO] running `"docker" "start" "-a" "f537bd0fcbe631228165c052dc71c2a8e49a9484049e2d2d5a865386e9ba8e68"`
[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 0.63s
[INFO] running `"docker" "inspect" "f537bd0fcbe631228165c052dc71c2a8e49a9484049e2d2d5a865386e9ba8e68"`
[INFO] running `"docker" "rm" "-f" "f537bd0fcbe631228165c052dc71c2a8e49a9484049e2d2d5a865386e9ba8e68"`
[INFO] [stdout] f537bd0fcbe631228165c052dc71c2a8e49a9484049e2d2d5a865386e9ba8e68
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] ab3b5e50b1ee641e39d95aba157cf4413c4655ac5217ac060f6f2303c80371af
[INFO] running `"docker" "start" "-a" "ab3b5e50b1ee641e39d95aba157cf4413c4655ac5217ac060f6f2303c80371af"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustracker-67adf0cbe76e61bc
[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" "ab3b5e50b1ee641e39d95aba157cf4413c4655ac5217ac060f6f2303c80371af"`
[INFO] running `"docker" "rm" "-f" "ab3b5e50b1ee641e39d95aba157cf4413c4655ac5217ac060f6f2303c80371af"`
[INFO] [stdout] ab3b5e50b1ee641e39d95aba157cf4413c4655ac5217ac060f6f2303c80371af