[INFO] updating cached repository m1kc/sfn-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/m1kc/sfn-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/m1kc/sfn-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/m1kc/sfn-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/m1kc/sfn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/m1kc/sfn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 117a6c663dff70a171fba6cbe9ebde3bf3d7cd95
[INFO] sha for GitHub repo m1kc/sfn-rust: 117a6c663dff70a171fba6cbe9ebde3bf3d7cd95
[INFO] validating manifest of m1kc/sfn-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 m1kc/sfn-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 m1kc/sfn-rust
[INFO] finished frobbing m1kc/sfn-rust
[INFO] frobbed toml for m1kc/sfn-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-rust/Cargo.toml
[INFO] started frobbing m1kc/sfn-rust
[INFO] finished frobbing m1kc/sfn-rust
[INFO] frobbed toml for m1kc/sfn-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/m1kc/sfn-rust/Cargo.toml
[INFO] crate m1kc/sfn-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 m1kc/sfn-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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-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] 45a3afdb8dad8bbaea40b69441d8cb8d847b738c3071c3fbd6e5c0a5921f627e
[INFO] running `"docker" "start" "-a" "45a3afdb8dad8bbaea40b69441d8cb8d847b738c3071c3fbd6e5c0a5921f627e"`
[INFO] [stderr]    Compiling md5 v0.5.0
[INFO] [stderr]    Compiling sfn v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/protocol.rs:23:7
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut file = File::open(&filename)?;
[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 2.94s
[INFO] running `"docker" "inspect" "45a3afdb8dad8bbaea40b69441d8cb8d847b738c3071c3fbd6e5c0a5921f627e"`
[INFO] running `"docker" "rm" "-f" "45a3afdb8dad8bbaea40b69441d8cb8d847b738c3071c3fbd6e5c0a5921f627e"`
[INFO] [stdout] 45a3afdb8dad8bbaea40b69441d8cb8d847b738c3071c3fbd6e5c0a5921f627e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-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] c40be0c800696409f819c94d17331372bb2d5a3f3b808c1674f25f4f420b9783
[INFO] running `"docker" "start" "-a" "c40be0c800696409f819c94d17331372bb2d5a3f3b808c1674f25f4f420b9783"`
[INFO] [stderr]    Compiling sfn v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/protocol.rs:23:7
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut file = File::open(&filename)?;
[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 0.62s
[INFO] running `"docker" "inspect" "c40be0c800696409f819c94d17331372bb2d5a3f3b808c1674f25f4f420b9783"`
[INFO] running `"docker" "rm" "-f" "c40be0c800696409f819c94d17331372bb2d5a3f3b808c1674f25f4f420b9783"`
[INFO] [stdout] c40be0c800696409f819c94d17331372bb2d5a3f3b808c1674f25f4f420b9783
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/m1kc/sfn-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"`
[INFO] [stdout] 1ee8c20fda3e4d0f8d77e96ba29088b39495b1eeb38f597bcc4c44f61acd7237
[INFO] running `"docker" "start" "-a" "1ee8c20fda3e4d0f8d77e96ba29088b39495b1eeb38f597bcc4c44f61acd7237"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sfn-c2249f7b2541b623
[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" "1ee8c20fda3e4d0f8d77e96ba29088b39495b1eeb38f597bcc4c44f61acd7237"`
[INFO] running `"docker" "rm" "-f" "1ee8c20fda3e4d0f8d77e96ba29088b39495b1eeb38f597bcc4c44f61acd7237"`
[INFO] [stdout] 1ee8c20fda3e4d0f8d77e96ba29088b39495b1eeb38f597bcc4c44f61acd7237