[INFO] updating cached repository kickinbahk/fizzbuzz_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kickinbahk/fizzbuzz_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kickinbahk/fizzbuzz_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/kickinbahk/fizzbuzz_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kickinbahk/fizzbuzz_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kickinbahk/fizzbuzz_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kickinbahk/fizzbuzz_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kickinbahk/fizzbuzz_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2c194d45c96731ba898f701e93e2a78fa5035fdf
[INFO] sha for GitHub repo kickinbahk/fizzbuzz_rust: 2c194d45c96731ba898f701e93e2a78fa5035fdf
[INFO] validating manifest of kickinbahk/fizzbuzz_rust 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 kickinbahk/fizzbuzz_rust 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 kickinbahk/fizzbuzz_rust
[INFO] finished frobbing kickinbahk/fizzbuzz_rust
[INFO] frobbed toml for kickinbahk/fizzbuzz_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/kickinbahk/fizzbuzz_rust/Cargo.toml
[INFO] started frobbing kickinbahk/fizzbuzz_rust
[INFO] finished frobbing kickinbahk/fizzbuzz_rust
[INFO] frobbed toml for kickinbahk/fizzbuzz_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kickinbahk/fizzbuzz_rust/Cargo.toml
[INFO] crate kickinbahk/fizzbuzz_rust 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing kickinbahk/fizzbuzz_rust 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/kickinbahk/fizzbuzz_rust:/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] 49242775820f6d733888d81b483d9650d1994532e39ed5e0f5c6b5c6b7d0588c
[INFO] running `"docker" "start" "-a" "49242775820f6d733888d81b483d9650d1994532e39ed5e0f5c6b5c6b7d0588c"`
[INFO] [stderr]    Compiling fizzbuzz_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut range = 1..100;
[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 0.36s
[INFO] running `"docker" "inspect" "49242775820f6d733888d81b483d9650d1994532e39ed5e0f5c6b5c6b7d0588c"`
[INFO] running `"docker" "rm" "-f" "49242775820f6d733888d81b483d9650d1994532e39ed5e0f5c6b5c6b7d0588c"`
[INFO] [stdout] 49242775820f6d733888d81b483d9650d1994532e39ed5e0f5c6b5c6b7d0588c
[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/kickinbahk/fizzbuzz_rust:/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] 4f45c0eff3e3cc59160b69f9dbdf29517d05e1930cd5455985a58d5d0c58ddb8
[INFO] running `"docker" "start" "-a" "4f45c0eff3e3cc59160b69f9dbdf29517d05e1930cd5455985a58d5d0c58ddb8"`
[INFO] [stderr]    Compiling fizzbuzz_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `fizzbuzz_rust`
[INFO] [stderr]  --> tests/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate fizzbuzz_rust;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `fizzbuzz_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut range = 1..100;
[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] error: build failed
[INFO] running `"docker" "inspect" "4f45c0eff3e3cc59160b69f9dbdf29517d05e1930cd5455985a58d5d0c58ddb8"`
[INFO] running `"docker" "rm" "-f" "4f45c0eff3e3cc59160b69f9dbdf29517d05e1930cd5455985a58d5d0c58ddb8"`
[INFO] [stdout] 4f45c0eff3e3cc59160b69f9dbdf29517d05e1930cd5455985a58d5d0c58ddb8