[INFO] updating cached repository cstorey/gll-experiments
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cstorey/gll-experiments
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cstorey/gll-experiments" "work/ex/beta-1.37-6/sources/1.36.0/gh/cstorey/gll-experiments"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/cstorey/gll-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cstorey/gll-experiments" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cstorey/gll-experiments"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cstorey/gll-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 31e529f404d371a044cef55fdd449c6989a52c18
[INFO] sha for GitHub repo cstorey/gll-experiments: 31e529f404d371a044cef55fdd449c6989a52c18
[INFO] validating manifest of cstorey/gll-experiments 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 cstorey/gll-experiments 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 cstorey/gll-experiments
[INFO] finished frobbing cstorey/gll-experiments
[INFO] frobbed toml for cstorey/gll-experiments written to work/ex/beta-1.37-6/sources/1.36.0/gh/cstorey/gll-experiments/Cargo.toml
[INFO] started frobbing cstorey/gll-experiments
[INFO] finished frobbing cstorey/gll-experiments
[INFO] frobbed toml for cstorey/gll-experiments written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cstorey/gll-experiments/Cargo.toml
[INFO] crate cstorey/gll-experiments 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cstorey/gll-experiments 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-6/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/cstorey/gll-experiments:/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] ddaa75da5d3f00d2d75d45f1626ac30d7be774fd63508918807d0b2d1f26b28a
[INFO] running `"docker" "start" "-a" "ddaa75da5d3f00d2d75d45f1626ac30d7be774fd63508918807d0b2d1f26b28a"`
[INFO] [stderr]    Compiling gll-examples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:102:17
[INFO] [stderr]     |
[INFO] [stderr] 102 |             let mut fromv = self.gss.entry(v).or_insert_with(BTreeSet::new);
[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: type alias is never used: `Stack`
[INFO] [stderr]   --> src/main.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | type Stack = VecDeque<Extlbl>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.02s
[INFO] running `"docker" "inspect" "ddaa75da5d3f00d2d75d45f1626ac30d7be774fd63508918807d0b2d1f26b28a"`
[INFO] running `"docker" "rm" "-f" "ddaa75da5d3f00d2d75d45f1626ac30d7be774fd63508918807d0b2d1f26b28a"`
[INFO] [stdout] ddaa75da5d3f00d2d75d45f1626ac30d7be774fd63508918807d0b2d1f26b28a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/cstorey/gll-experiments:/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] c1732bae309893b501d1c91d7f8a2fb02880d62c24c51ce30759bf73793b2493
[INFO] running `"docker" "start" "-a" "c1732bae309893b501d1c91d7f8a2fb02880d62c24c51ce30759bf73793b2493"`
[INFO] [stderr]    Compiling gll-examples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:102:17
[INFO] [stderr]     |
[INFO] [stderr] 102 |             let mut fromv = self.gss.entry(v).or_insert_with(BTreeSet::new);
[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: type alias is never used: `Stack`
[INFO] [stderr]   --> src/main.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | type Stack = VecDeque<Extlbl>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.54s
[INFO] running `"docker" "inspect" "c1732bae309893b501d1c91d7f8a2fb02880d62c24c51ce30759bf73793b2493"`
[INFO] running `"docker" "rm" "-f" "c1732bae309893b501d1c91d7f8a2fb02880d62c24c51ce30759bf73793b2493"`
[INFO] [stdout] c1732bae309893b501d1c91d7f8a2fb02880d62c24c51ce30759bf73793b2493
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/cstorey/gll-experiments:/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] d08f92c038caad3ddbbba7b49f0fa0735c5815e6dee225d00e3186415072aa9c
[INFO] running `"docker" "start" "-a" "d08f92c038caad3ddbbba7b49f0fa0735c5815e6dee225d00e3186415072aa9c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gll_examples-c0fb53befebcfe5e
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test rejects_z ... ok
[INFO] [stdout] test recognises_empty_string ... ok
[INFO] [stdout] test recognises_b ... ok
[INFO] [stdout] test recognises_aad ... ok
[INFO] [stdout] test rejects_aadz ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d08f92c038caad3ddbbba7b49f0fa0735c5815e6dee225d00e3186415072aa9c"`
[INFO] running `"docker" "rm" "-f" "d08f92c038caad3ddbbba7b49f0fa0735c5815e6dee225d00e3186415072aa9c"`
[INFO] [stdout] d08f92c038caad3ddbbba7b49f0fa0735c5815e6dee225d00e3186415072aa9c