[INFO] crate ordered-permutation 0.1.1 is already in cache
[INFO] extracting crate ordered-permutation 0.1.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/ordered-permutation/0.1.1
[INFO] extracting crate ordered-permutation 0.1.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ordered-permutation/0.1.1
[INFO] validating manifest of ordered-permutation-0.1.1 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 ordered-permutation-0.1.1 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 ordered-permutation-0.1.1
[INFO] finished frobbing ordered-permutation-0.1.1
[INFO] frobbed toml for ordered-permutation-0.1.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/ordered-permutation/0.1.1/Cargo.toml
[INFO] started frobbing ordered-permutation-0.1.1
[INFO] finished frobbing ordered-permutation-0.1.1
[INFO] frobbed toml for ordered-permutation-0.1.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ordered-permutation/0.1.1/Cargo.toml
[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 ordered-permutation-0.1.1 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/reg/ordered-permutation/0.1.1:/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] 2a0b31570f77ad054950921a2308c86e5d502b736e264b3c2281e3ba385d1cc2
[INFO] running `"docker" "start" "-a" "2a0b31570f77ad054950921a2308c86e5d502b736e264b3c2281e3ba385d1cc2"`
[INFO] [stderr]    Compiling ordered-permutation v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:64:17
[INFO] [stderr]    |
[INFO] [stderr] 64 |             for mut node in self.children.iter_mut() {
[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 0.38s
[INFO] running `"docker" "inspect" "2a0b31570f77ad054950921a2308c86e5d502b736e264b3c2281e3ba385d1cc2"`
[INFO] running `"docker" "rm" "-f" "2a0b31570f77ad054950921a2308c86e5d502b736e264b3c2281e3ba385d1cc2"`
[INFO] [stdout] 2a0b31570f77ad054950921a2308c86e5d502b736e264b3c2281e3ba385d1cc2
[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/reg/ordered-permutation/0.1.1:/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] 24866104a78479dbb99ad76e08f512df378441049f00606018f6aacf93cf93da
[INFO] running `"docker" "start" "-a" "24866104a78479dbb99ad76e08f512df378441049f00606018f6aacf93cf93da"`
[INFO] [stderr]    Compiling ordered-permutation v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:64:17
[INFO] [stderr]    |
[INFO] [stderr] 64 |             for mut node in self.children.iter_mut() {
[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 0.56s
[INFO] running `"docker" "inspect" "24866104a78479dbb99ad76e08f512df378441049f00606018f6aacf93cf93da"`
[INFO] running `"docker" "rm" "-f" "24866104a78479dbb99ad76e08f512df378441049f00606018f6aacf93cf93da"`
[INFO] [stdout] 24866104a78479dbb99ad76e08f512df378441049f00606018f6aacf93cf93da
[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/reg/ordered-permutation/0.1.1:/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] f0666bff66fc515917eea85e808acc8642b049907261ffc0bd86429f0ce8a9f1
[INFO] running `"docker" "start" "-a" "f0666bff66fc515917eea85e808acc8642b049907261ffc0bd86429f0ce8a9f1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ordered_permutation-91bbb348cd86f978
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test unique ... ok
[INFO] [stdout] test count ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ordered-permutation
[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" "f0666bff66fc515917eea85e808acc8642b049907261ffc0bd86429f0ce8a9f1"`
[INFO] running `"docker" "rm" "-f" "f0666bff66fc515917eea85e808acc8642b049907261ffc0bd86429f0ce8a9f1"`
[INFO] [stdout] f0666bff66fc515917eea85e808acc8642b049907261ffc0bd86429f0ce8a9f1