[INFO] crate traildb 0.4.0 is already in cache
[INFO] extracting crate traildb 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/traildb/0.4.0
[INFO] extracting crate traildb 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/traildb/0.4.0
[INFO] validating manifest of traildb-0.4.0 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 traildb-0.4.0 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 traildb-0.4.0
[INFO] finished frobbing traildb-0.4.0
[INFO] frobbed toml for traildb-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/traildb/0.4.0/Cargo.toml
[INFO] started frobbing traildb-0.4.0
[INFO] finished frobbing traildb-0.4.0
[INFO] frobbed toml for traildb-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/traildb/0.4.0/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 traildb-0.4.0 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/traildb/0.4.0:/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] 8a4a5de5dacd7c5defe9e30bbfa30adb3c6c58911f6b9d09ef8019c7058f94a6
[INFO] running `"docker" "start" "-a" "8a4a5de5dacd7c5defe9e30bbfa30adb3c6c58911f6b9d09ef8019c7058f94a6"`
[INFO] [stderr]    Compiling clang-sys v0.12.0
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]    Compiling bindgen v0.20.5
[INFO] [stderr]    Compiling traildb v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0583]: file not found for module `ffi`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | mod ffi;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: name the file either ffi.rs or ffi/mod.rs inside the directory "src"
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0583`.
[INFO] [stderr] error: Could not compile `traildb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8a4a5de5dacd7c5defe9e30bbfa30adb3c6c58911f6b9d09ef8019c7058f94a6"`
[INFO] running `"docker" "rm" "-f" "8a4a5de5dacd7c5defe9e30bbfa30adb3c6c58911f6b9d09ef8019c7058f94a6"`
[INFO] [stdout] 8a4a5de5dacd7c5defe9e30bbfa30adb3c6c58911f6b9d09ef8019c7058f94a6