[INFO] updating cached repository howeih/Day-6-Postfix-notation
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-6-Postfix-notation
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-6-Postfix-notation" "work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-6-Postfix-notation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-6-Postfix-notation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-6-Postfix-notation" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-6-Postfix-notation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-6-Postfix-notation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 31b590a37cd4f2f1b12b611fd885e0a69cc42107
[INFO] sha for GitHub repo howeih/Day-6-Postfix-notation: 31b590a37cd4f2f1b12b611fd885e0a69cc42107
[INFO] validating manifest of howeih/Day-6-Postfix-notation 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 howeih/Day-6-Postfix-notation 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 howeih/Day-6-Postfix-notation
[INFO] finished frobbing howeih/Day-6-Postfix-notation
[INFO] frobbed toml for howeih/Day-6-Postfix-notation written to work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-6-Postfix-notation/Cargo.toml
[INFO] started frobbing howeih/Day-6-Postfix-notation
[INFO] finished frobbing howeih/Day-6-Postfix-notation
[INFO] frobbed toml for howeih/Day-6-Postfix-notation written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-6-Postfix-notation/Cargo.toml
[INFO] crate howeih/Day-6-Postfix-notation 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 howeih/Day-6-Postfix-notation 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/howeih/Day-6-Postfix-notation:/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] 6d2c556f3a828c41252bf4cbf6eb342e3374acf36818c4793006debb7515ef07
[INFO] running `"docker" "start" "-a" "6d2c556f3a828c41252bf4cbf6eb342e3374acf36818c4793006debb7515ef07"`
[INFO] [stderr]    Compiling postfix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut x: f64;
[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 0.73s
[INFO] running `"docker" "inspect" "6d2c556f3a828c41252bf4cbf6eb342e3374acf36818c4793006debb7515ef07"`
[INFO] running `"docker" "rm" "-f" "6d2c556f3a828c41252bf4cbf6eb342e3374acf36818c4793006debb7515ef07"`
[INFO] [stdout] 6d2c556f3a828c41252bf4cbf6eb342e3374acf36818c4793006debb7515ef07
[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/howeih/Day-6-Postfix-notation:/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] 6756ee51b3a830d1e66f0254469a422c4bed1736c23adf6bbb10ccb7cc4456dc
[INFO] running `"docker" "start" "-a" "6756ee51b3a830d1e66f0254469a422c4bed1736c23adf6bbb10ccb7cc4456dc"`
[INFO] [stderr]    Compiling postfix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut x: f64;
[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 0.51s
[INFO] running `"docker" "inspect" "6756ee51b3a830d1e66f0254469a422c4bed1736c23adf6bbb10ccb7cc4456dc"`
[INFO] running `"docker" "rm" "-f" "6756ee51b3a830d1e66f0254469a422c4bed1736c23adf6bbb10ccb7cc4456dc"`
[INFO] [stdout] 6756ee51b3a830d1e66f0254469a422c4bed1736c23adf6bbb10ccb7cc4456dc
[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/howeih/Day-6-Postfix-notation:/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] 332d0acfc5835124951dd579201639ee1a178324bca088fcec4d2d5657b78920
[INFO] running `"docker" "start" "-a" "332d0acfc5835124951dd579201639ee1a178324bca088fcec4d2d5657b78920"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/postfix-9463646890fd844d
[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" "332d0acfc5835124951dd579201639ee1a178324bca088fcec4d2d5657b78920"`
[INFO] running `"docker" "rm" "-f" "332d0acfc5835124951dd579201639ee1a178324bca088fcec4d2d5657b78920"`
[INFO] [stdout] 332d0acfc5835124951dd579201639ee1a178324bca088fcec4d2d5657b78920