[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 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-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] dc776158978b78cec5a9b885a0eb60c76f080bf609b639784cdc82462cf9f88a
[INFO] running `"docker" "start" "-a" "dc776158978b78cec5a9b885a0eb60c76f080bf609b639784cdc82462cf9f88a"`
[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 0.67s
[INFO] running `"docker" "inspect" "dc776158978b78cec5a9b885a0eb60c76f080bf609b639784cdc82462cf9f88a"`
[INFO] running `"docker" "rm" "-f" "dc776158978b78cec5a9b885a0eb60c76f080bf609b639784cdc82462cf9f88a"`
[INFO] [stdout] dc776158978b78cec5a9b885a0eb60c76f080bf609b639784cdc82462cf9f88a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] bee6b73e78ec95ec34ef696992c111838d6ad11102129c6f609834736498c478
[INFO] running `"docker" "start" "-a" "bee6b73e78ec95ec34ef696992c111838d6ad11102129c6f609834736498c478"`
[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 2.31s
[INFO] running `"docker" "inspect" "bee6b73e78ec95ec34ef696992c111838d6ad11102129c6f609834736498c478"`
[INFO] running `"docker" "rm" "-f" "bee6b73e78ec95ec34ef696992c111838d6ad11102129c6f609834736498c478"`
[INFO] [stdout] bee6b73e78ec95ec34ef696992c111838d6ad11102129c6f609834736498c478
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 8017e662c91385775b1b55737f52e6c6013cd51177667d96255834ff814be462
[INFO] running `"docker" "start" "-a" "8017e662c91385775b1b55737f52e6c6013cd51177667d96255834ff814be462"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_peg-451805fa1d03f857
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test test::calculator::parse_mul ... ok
[INFO] [stdout] test test::calculator::parse_number ... ok
[INFO] [stdout] test test::calculator::parse_plus ... ok
[INFO] [stdout] test test::combos::test_position ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiorho_from_hi ... ok
[INFO] [stdout] test test::calculator::parse_expr ... ok
[INFO] [stdout] test test::silly_grammar::parse_hi_from_hi ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiho_from_ho ... ok
[INFO] [stdout] test test::silly_grammar::parse_repeat ... ok
[INFO] [stdout] test test::silly_grammar::parse_hiorho_from_ho ... ok
[INFO] [stdout] test test::calculator::parse_parens ... ok
[INFO] [stdout] test tree::test::iterate ... ok
[INFO] [stdout] test test::silly_grammar::parse_sum_from_ho ... ok
[INFO] [stdout] test test::classy::parse_a_class ... ok
[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] [stderr]    Doc-tests rusty-peg
[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" "8017e662c91385775b1b55737f52e6c6013cd51177667d96255834ff814be462"`
[INFO] running `"docker" "rm" "-f" "8017e662c91385775b1b55737f52e6c6013cd51177667d96255834ff814be462"`
[INFO] [stdout] 8017e662c91385775b1b55737f52e6c6013cd51177667d96255834ff814be462