[INFO] updating cached repository Wilfred/sooty
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Wilfred/sooty
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Wilfred/sooty" "work/ex/beta-1.37-6/sources/1.36.0/gh/Wilfred/sooty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Wilfred/sooty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Wilfred/sooty" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f58fbecffbb7973903da328e77296ba7364b4122
[INFO] sha for GitHub repo Wilfred/sooty: f58fbecffbb7973903da328e77296ba7364b4122
[INFO] validating manifest of Wilfred/sooty on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Wilfred/sooty on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Wilfred/sooty
[INFO] finished frobbing Wilfred/sooty
[INFO] frobbed toml for Wilfred/sooty written to work/ex/beta-1.37-6/sources/1.36.0/gh/Wilfred/sooty/Cargo.toml
[INFO] started frobbing Wilfred/sooty
[INFO] finished frobbing Wilfred/sooty
[INFO] frobbed toml for Wilfred/sooty written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty/Cargo.toml
[INFO] crate Wilfred/sooty already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Wilfred/sooty/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Wilfred/sooty against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] db407f4403e842f3f0373e4519efa692c962c88dfd392b506d13c098a9b5993d
[INFO] running `"docker" "start" "-a" "db407f4403e842f3f0373e4519efa692c962c88dfd392b506d13c098a9b5993d"`
[INFO] [stderr]    Compiling sooty v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lexer.rs:93:26
[INFO] [stderr]    |
[INFO] [stderr] 93 |                     Some(mut parent_list) => {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `"docker" "inspect" "db407f4403e842f3f0373e4519efa692c962c88dfd392b506d13c098a9b5993d"`
[INFO] running `"docker" "rm" "-f" "db407f4403e842f3f0373e4519efa692c962c88dfd392b506d13c098a9b5993d"`
[INFO] [stdout] db407f4403e842f3f0373e4519efa692c962c88dfd392b506d13c098a9b5993d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] bede84adce1c64e866a96283bf2b7b3f3af31ca66112c7004f3cab379ed89979
[INFO] running `"docker" "start" "-a" "bede84adce1c64e866a96283bf2b7b3f3af31ca66112c7004f3cab379ed89979"`
[INFO] [stderr]    Compiling sooty v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lexer.rs:93:26
[INFO] [stderr]    |
[INFO] [stderr] 93 |                     Some(mut parent_list) => {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "bede84adce1c64e866a96283bf2b7b3f3af31ca66112c7004f3cab379ed89979"`
[INFO] running `"docker" "rm" "-f" "bede84adce1c64e866a96283bf2b7b3f3af31ca66112c7004f3cab379ed89979"`
[INFO] [stdout] bede84adce1c64e866a96283bf2b7b3f3af31ca66112c7004f3cab379ed89979
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Wilfred/sooty:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 52f066433faae0996d86ea30e09e3ffbab56400f44ea8375558343a22cd45b26
[INFO] running `"docker" "start" "-a" "52f066433faae0996d86ea30e09e3ffbab56400f44ea8375558343a22cd45b26"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sooty-2685fcd59b020910
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test lexer::test_parse_unbalanced_left ... ok
[INFO] [stdout] test lexer::test_parse_unbalanced_right ... ok
[INFO] [stdout] test lexer::test_parse_empty ... ok
[INFO] [stdout] test lexer::test_lex_single_number ... ok
[INFO] [stdout] test lexer::test_lex_right_paren ... ok
[INFO] [stdout] test lexer::test_lex_multiple_numbers ... ok
[INFO] [stdout] test lexer::test_lex_left_paren_and_number ... ok
[INFO] [stdout] test lexer::test_lex_left_paren ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "52f066433faae0996d86ea30e09e3ffbab56400f44ea8375558343a22cd45b26"`
[INFO] running `"docker" "rm" "-f" "52f066433faae0996d86ea30e09e3ffbab56400f44ea8375558343a22cd45b26"`
[INFO] [stdout] 52f066433faae0996d86ea30e09e3ffbab56400f44ea8375558343a22cd45b26