[INFO] updating cached repository hsabouri/rust_fir
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hsabouri/rust_fir
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hsabouri/rust_fir" "work/ex/beta-1.38-1/sources/1.37.0/gh/hsabouri/rust_fir"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hsabouri/rust_fir'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hsabouri/rust_fir" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hsabouri/rust_fir"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hsabouri/rust_fir'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 544ed9d411390f450b7f6fafc725ec14d5c8b1e5
[INFO] sha for GitHub repo hsabouri/rust_fir: 544ed9d411390f450b7f6fafc725ec14d5c8b1e5
[INFO] validating manifest of hsabouri/rust_fir 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 hsabouri/rust_fir 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 hsabouri/rust_fir
[INFO] finished frobbing hsabouri/rust_fir
[INFO] frobbed toml for hsabouri/rust_fir written to work/ex/beta-1.38-1/sources/1.37.0/gh/hsabouri/rust_fir/Cargo.toml
[INFO] started frobbing hsabouri/rust_fir
[INFO] finished frobbing hsabouri/rust_fir
[INFO] frobbed toml for hsabouri/rust_fir written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hsabouri/rust_fir/Cargo.toml
[INFO] crate hsabouri/rust_fir 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]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hsabouri/rust_fir/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[INFO] the lockfile is outdated, regenerating it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] 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 hsabouri/rust_fir 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-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hsabouri/rust_fir:/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] 481b76e533d726c8dd0a5800fc211ca29d8c4322d20eb7dba3cad7a6194a2523
[INFO] running `"docker" "start" "-a" "481b76e533d726c8dd0a5800fc211ca29d8c4322d20eb7dba3cad7a6194a2523"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling fir v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `"docker" "inspect" "481b76e533d726c8dd0a5800fc211ca29d8c4322d20eb7dba3cad7a6194a2523"`
[INFO] running `"docker" "rm" "-f" "481b76e533d726c8dd0a5800fc211ca29d8c4322d20eb7dba3cad7a6194a2523"`
[INFO] [stdout] 481b76e533d726c8dd0a5800fc211ca29d8c4322d20eb7dba3cad7a6194a2523
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hsabouri/rust_fir:/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] 47f1a76c15e08d6f50459e1f34adf8699a8e428acf5dc3ce86ce841f1c36ae40
[INFO] running `"docker" "start" "-a" "47f1a76c15e08d6f50459e1f34adf8699a8e428acf5dc3ce86ce841f1c36ae40"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling fir v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0583]: file not found for module `tree`
[INFO] [stderr]  --> examples/simple_tree.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod tree;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: name the file either tree.rs or tree/mod.rs inside the directory "examples"
[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 `fir`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "47f1a76c15e08d6f50459e1f34adf8699a8e428acf5dc3ce86ce841f1c36ae40"`
[INFO] running `"docker" "rm" "-f" "47f1a76c15e08d6f50459e1f34adf8699a8e428acf5dc3ce86ce841f1c36ae40"`
[INFO] [stdout] 47f1a76c15e08d6f50459e1f34adf8699a8e428acf5dc3ce86ce841f1c36ae40