[INFO] crate extractor 0.1.0 is already in cache
[INFO] extracting crate extractor 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/extractor/0.1.0
[INFO] extracting crate extractor 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/extractor/0.1.0
[INFO] validating manifest of extractor-0.1.0 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 extractor-0.1.0 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 extractor-0.1.0
[INFO] finished frobbing extractor-0.1.0
[INFO] frobbed toml for extractor-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/extractor/0.1.0/Cargo.toml
[INFO] started frobbing extractor-0.1.0
[INFO] finished frobbing extractor-0.1.0
[INFO] frobbed toml for extractor-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/extractor/0.1.0/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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing extractor-0.1.0 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-3/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/extractor/0.1.0:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 70628f12e2aabff9bac78588b5d684f6e53f0e146c257f731fe6323334ddb996
[INFO] running `"docker" "start" "-a" "70628f12e2aabff9bac78588b5d684f6e53f0e146c257f731fe6323334ddb996"`
[INFO] [stderr]    Compiling extractor v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let mut word = s.chars()
[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 0.64s
[INFO] running `"docker" "inspect" "70628f12e2aabff9bac78588b5d684f6e53f0e146c257f731fe6323334ddb996"`
[INFO] running `"docker" "rm" "-f" "70628f12e2aabff9bac78588b5d684f6e53f0e146c257f731fe6323334ddb996"`
[INFO] [stdout] 70628f12e2aabff9bac78588b5d684f6e53f0e146c257f731fe6323334ddb996
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/extractor/0.1.0:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 01d9abcce733a36fd25b8f6591170e5747d16707253ab19a6c064ef8bd714547
[INFO] running `"docker" "start" "-a" "01d9abcce733a36fd25b8f6591170e5747d16707253ab19a6c064ef8bd714547"`
[INFO] [stderr]    Compiling extractor v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let mut word = s.chars()
[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 2.23s
[INFO] running `"docker" "inspect" "01d9abcce733a36fd25b8f6591170e5747d16707253ab19a6c064ef8bd714547"`
[INFO] running `"docker" "rm" "-f" "01d9abcce733a36fd25b8f6591170e5747d16707253ab19a6c064ef8bd714547"`
[INFO] [stdout] 01d9abcce733a36fd25b8f6591170e5747d16707253ab19a6c064ef8bd714547
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/extractor/0.1.0:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 926a8460e02aebcac8c8f65fecfffba969af1c74600f5f3c30582009aa93f1f7
[INFO] running `"docker" "start" "-a" "926a8460e02aebcac8c8f65fecfffba969af1c74600f5f3c30582009aa93f1f7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/extractor-8d250c5d6a2e2698
[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] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/extractor-c386b6b24ac0fbb6
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test_structure_compiler_output ... ok
[INFO] [stdout] test test_warning ... ok
[INFO] [stdout] test test_without_error ... ok
[INFO] [stdout] test test_with_error ... ok
[INFO] [stdout] test test_multiple_error_messages ... ok
[INFO] [stderr]    Doc-tests extractor
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - get_error_text_with_error_code (line 37) ... ok
[INFO] [stdout] test src/lib.rs - get_error_text_without_error_code (line 51) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "926a8460e02aebcac8c8f65fecfffba969af1c74600f5f3c30582009aa93f1f7"`
[INFO] running `"docker" "rm" "-f" "926a8460e02aebcac8c8f65fecfffba969af1c74600f5f3c30582009aa93f1f7"`
[INFO] [stdout] 926a8460e02aebcac8c8f65fecfffba969af1c74600f5f3c30582009aa93f1f7