[INFO] updating cached repository sombr/gen-inv-index
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sombr/gen-inv-index
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sombr/gen-inv-index" "work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sombr/gen-inv-index" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sombr/gen-inv-index"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sombr/gen-inv-index'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8d4b3b15c63d5a6968cbd2c29559636ad4020055
[INFO] sha for GitHub repo sombr/gen-inv-index: 8d4b3b15c63d5a6968cbd2c29559636ad4020055
[INFO] validating manifest of sombr/gen-inv-index 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 sombr/gen-inv-index 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 sombr/gen-inv-index
[INFO] finished frobbing sombr/gen-inv-index
[INFO] frobbed toml for sombr/gen-inv-index written to work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index/Cargo.toml
[INFO] started frobbing sombr/gen-inv-index
[INFO] finished frobbing sombr/gen-inv-index
[INFO] frobbed toml for sombr/gen-inv-index written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sombr/gen-inv-index/Cargo.toml
[INFO] crate sombr/gen-inv-index already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/sombr/inv-index.git`
[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] [stderr]     Updating git repository `https://github.com/sombr/inv-index.git`
[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 sombr/gen-inv-index 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index:/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] 41ffcc2f7f8e3b9f8fb4617b2fd8dff703fe454c075b655e42c3914821780e5e
[INFO] running `"docker" "start" "-a" "41ffcc2f7f8e3b9f8fb4617b2fd8dff703fe454c075b655e42c3914821780e5e"`
[INFO] [stderr]    Compiling rmp v0.7.5
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]    Compiling rmp-serde v0.10.0
[INFO] [stderr]    Compiling inv-index v0.1.0 (https://github.com/sombr/inv-index.git#296b30d7)
[INFO] [stderr]    Compiling gen-inv-index v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `in_memory`
[INFO] [stderr]   --> src/index.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     in_memory: bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.63s
[INFO] running `"docker" "inspect" "41ffcc2f7f8e3b9f8fb4617b2fd8dff703fe454c075b655e42c3914821780e5e"`
[INFO] running `"docker" "rm" "-f" "41ffcc2f7f8e3b9f8fb4617b2fd8dff703fe454c075b655e42c3914821780e5e"`
[INFO] [stdout] 41ffcc2f7f8e3b9f8fb4617b2fd8dff703fe454c075b655e42c3914821780e5e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index:/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] 12f67c0f48426d0e0eb880dad318400569656c544000338e683d1bcdc49ef304
[INFO] running `"docker" "start" "-a" "12f67c0f48426d0e0eb880dad318400569656c544000338e683d1bcdc49ef304"`
[INFO] [stderr]    Compiling gen-inv-index v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `in_memory`
[INFO] [stderr]   --> src/index.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     in_memory: bool
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "12f67c0f48426d0e0eb880dad318400569656c544000338e683d1bcdc49ef304"`
[INFO] running `"docker" "rm" "-f" "12f67c0f48426d0e0eb880dad318400569656c544000338e683d1bcdc49ef304"`
[INFO] [stdout] 12f67c0f48426d0e0eb880dad318400569656c544000338e683d1bcdc49ef304
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/sombr/gen-inv-index:/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] ae69b42c02fcd2f40c0ad6054a2184f284a9f743a5b415384ded9f6f9d6e4a5e
[INFO] running `"docker" "start" "-a" "ae69b42c02fcd2f40c0ad6054a2184f284a9f743a5b415384ded9f6f9d6e4a5e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gen_inv_index-cf3d64a8900bd9d8
[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" "ae69b42c02fcd2f40c0ad6054a2184f284a9f743a5b415384ded9f6f9d6e4a5e"`
[INFO] running `"docker" "rm" "-f" "ae69b42c02fcd2f40c0ad6054a2184f284a9f743a5b415384ded9f6f9d6e4a5e"`
[INFO] [stdout] ae69b42c02fcd2f40c0ad6054a2184f284a9f743a5b415384ded9f6f9d6e4a5e