[INFO] crate rusty-peg 0.3.0 is already in cache
[INFO] extracting crate rusty-peg 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-peg/0.3.0
[INFO] extracting crate rusty-peg 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusty-peg/0.3.0
[INFO] validating manifest of rusty-peg-0.3.0 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 rusty-peg-0.3.0 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 rusty-peg-0.3.0
[INFO] finished frobbing rusty-peg-0.3.0
[INFO] frobbed toml for rusty-peg-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-peg/0.3.0/Cargo.toml
[INFO] started frobbing rusty-peg-0.3.0
[INFO] finished frobbing rusty-peg-0.3.0
[INFO] frobbed toml for rusty-peg-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusty-peg/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 rusty-peg-0.3.0 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-peg/0.3.0:/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=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] 1e709bf27718c772123e116b40c164ed9c8bc8e54e0d768619f1e01eea1539e5
[INFO] running `"docker" "start" "-a" "1e709bf27718c772123e116b40c164ed9c8bc8e54e0d768619f1e01eea1539e5"`
[INFO] [stderr]    Compiling rusty-peg v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/util.rs:169:13
[INFO] [stderr]     |
[INFO] [stderr] 169 |         let mut err;
[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 0.44s
[INFO] running `"docker" "inspect" "1e709bf27718c772123e116b40c164ed9c8bc8e54e0d768619f1e01eea1539e5"`
[INFO] running `"docker" "rm" "-f" "1e709bf27718c772123e116b40c164ed9c8bc8e54e0d768619f1e01eea1539e5"`
[INFO] [stdout] 1e709bf27718c772123e116b40c164ed9c8bc8e54e0d768619f1e01eea1539e5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-peg/0.3.0:/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=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] a909b98416c391ebf1f8407b467a899e43bf9af3872c84c7e8661ca374817cb4
[INFO] running `"docker" "start" "-a" "a909b98416c391ebf1f8407b467a899e43bf9af3872c84c7e8661ca374817cb4"`
[INFO] [stderr]    Compiling rusty-peg v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/util.rs:169:13
[INFO] [stderr]     |
[INFO] [stderr] 169 |         let mut err;
[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 3.27s
[INFO] running `"docker" "inspect" "a909b98416c391ebf1f8407b467a899e43bf9af3872c84c7e8661ca374817cb4"`
[INFO] running `"docker" "rm" "-f" "a909b98416c391ebf1f8407b467a899e43bf9af3872c84c7e8661ca374817cb4"`
[INFO] [stdout] a909b98416c391ebf1f8407b467a899e43bf9af3872c84c7e8661ca374817cb4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusty-peg/0.3.0:/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=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] bb5cb62950e70ebad2465c394c933ead61161380ce519366d101afbe271f0e2e
[INFO] running `"docker" "start" "-a" "bb5cb62950e70ebad2465c394c933ead61161380ce519366d101afbe271f0e2e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_peg-cfd142c1ffcd0961
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test test::calculator::parse_plus ... ok
[INFO] [stdout] test test::silly_grammar::parse_hi_from_hi ... ok
[INFO] [stdout] test test::calculator::parse_mul ... ok
[INFO] [stdout] test test::calculator::parse_parens ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiho_from_ho ... ok
[INFO] [stdout] test test::combos::test_position ... ok
[INFO] [stdout] test test::calculator::parse_number ... ok
[INFO] [stdout] test test::silly_grammar::parse_repeat ... ok
[INFO] [stdout] test test::silly_grammar::parse_sum_from_ho ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiorho_from_hi ... ok
[INFO] [stdout] test tree::test::iterate ... ok
[INFO] [stdout] test test::calculator::parse_expr ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiorho_from_ho ... ok
[INFO] [stdout] test test::classy::parse_a_class ... ok
[INFO] [stderr]    Doc-tests rusty-peg
[INFO] [stdout] test test::silly_grammar::parse_hi_from_ho ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "bb5cb62950e70ebad2465c394c933ead61161380ce519366d101afbe271f0e2e"`
[INFO] running `"docker" "rm" "-f" "bb5cb62950e70ebad2465c394c933ead61161380ce519366d101afbe271f0e2e"`
[INFO] [stdout] bb5cb62950e70ebad2465c394c933ead61161380ce519366d101afbe271f0e2e