[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-1.37-6/sources/1.36.0/gh/m1kc/sfn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/m1kc/sfn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/m1kc/sfn-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/m1kc/sfn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of m1kc/sfn-rust on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing m1kc/sfn-rust against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a6ead1da11f5b51c1ecf2780637af8dfb45c90bc2e5351ed54100bfa147c83c5
[INFO] running `"docker" "start" "-a" "a6ead1da11f5b51c1ecf2780637af8dfb45c90bc2e5351ed54100bfa147c83c5"`
[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 3.15s
[INFO] running `"docker" "inspect" "a6ead1da11f5b51c1ecf2780637af8dfb45c90bc2e5351ed54100bfa147c83c5"`
[INFO] running `"docker" "rm" "-f" "a6ead1da11f5b51c1ecf2780637af8dfb45c90bc2e5351ed54100bfa147c83c5"`
[INFO] [stdout] a6ead1da11f5b51c1ecf2780637af8dfb45c90bc2e5351ed54100bfa147c83c5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] e10840f125e42bd8f1c8872a4b6684a81f54847b254a305f68a4688b568a3eac
[INFO] running `"docker" "start" "-a" "e10840f125e42bd8f1c8872a4b6684a81f54847b254a305f68a4688b568a3eac"`
[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 1.08s
[INFO] running `"docker" "inspect" "e10840f125e42bd8f1c8872a4b6684a81f54847b254a305f68a4688b568a3eac"`
[INFO] running `"docker" "rm" "-f" "e10840f125e42bd8f1c8872a4b6684a81f54847b254a305f68a4688b568a3eac"`
[INFO] [stdout] e10840f125e42bd8f1c8872a4b6684a81f54847b254a305f68a4688b568a3eac
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] dcf081ace6dc51f439251c1a2cecc42c92bc1b22bb2cdf7bcb21b4187ace4a0a
[INFO] running `"docker" "start" "-a" "dcf081ace6dc51f439251c1a2cecc42c92bc1b22bb2cdf7bcb21b4187ace4a0a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sfn-16890c9de4d652dd
[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" "dcf081ace6dc51f439251c1a2cecc42c92bc1b22bb2cdf7bcb21b4187ace4a0a"`
[INFO] running `"docker" "rm" "-f" "dcf081ace6dc51f439251c1a2cecc42c92bc1b22bb2cdf7bcb21b4187ace4a0a"`
[INFO] [stdout] dcf081ace6dc51f439251c1a2cecc42c92bc1b22bb2cdf7bcb21b4187ace4a0a