[INFO] updating cached repository ranjeet-floyd/rust-hello-world
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ranjeet-floyd/rust-hello-world
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ranjeet-floyd/rust-hello-world" "work/ex/beta-1.38-1/sources/1.37.0/gh/ranjeet-floyd/rust-hello-world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ranjeet-floyd/rust-hello-world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ranjeet-floyd/rust-hello-world" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranjeet-floyd/rust-hello-world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranjeet-floyd/rust-hello-world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f67e27926fe185601ff0091a2f7efd35850fa9a
[INFO] sha for GitHub repo ranjeet-floyd/rust-hello-world: 2f67e27926fe185601ff0091a2f7efd35850fa9a
[INFO] validating manifest of ranjeet-floyd/rust-hello-world 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 ranjeet-floyd/rust-hello-world 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 ranjeet-floyd/rust-hello-world
[INFO] finished frobbing ranjeet-floyd/rust-hello-world
[INFO] frobbed toml for ranjeet-floyd/rust-hello-world written to work/ex/beta-1.38-1/sources/1.37.0/gh/ranjeet-floyd/rust-hello-world/Cargo.toml
[INFO] started frobbing ranjeet-floyd/rust-hello-world
[INFO] finished frobbing ranjeet-floyd/rust-hello-world
[INFO] frobbed toml for ranjeet-floyd/rust-hello-world written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranjeet-floyd/rust-hello-world/Cargo.toml
[INFO] crate ranjeet-floyd/rust-hello-world 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 ranjeet-floyd/rust-hello-world 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-7/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/ranjeet-floyd/rust-hello-world:/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] 45fdaaf03e83574e7af8e7263e032dbd74fa47f415728bd5c597f1348e15e955
[INFO] running `"docker" "start" "-a" "45fdaaf03e83574e7af8e7263e032dbd74fa47f415728bd5c597f1348e15e955"`
[INFO] [stderr]    Compiling rust-hello-world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `age` is never read
[INFO] [stderr]  --> src/file.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut age = 29;
[INFO] [stderr]   |             ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "45fdaaf03e83574e7af8e7263e032dbd74fa47f415728bd5c597f1348e15e955"`
[INFO] running `"docker" "rm" "-f" "45fdaaf03e83574e7af8e7263e032dbd74fa47f415728bd5c597f1348e15e955"`
[INFO] [stdout] 45fdaaf03e83574e7af8e7263e032dbd74fa47f415728bd5c597f1348e15e955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/ranjeet-floyd/rust-hello-world:/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] 54919f39b64b2c072934d3139d7cd3f6dc253b12fb6c39ad8855b7519a193367
[INFO] running `"docker" "start" "-a" "54919f39b64b2c072934d3139d7cd3f6dc253b12fb6c39ad8855b7519a193367"`
[INFO] [stderr]    Compiling rust-hello-world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `age` is never read
[INFO] [stderr]  --> src/file.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut age = 29;
[INFO] [stderr]   |             ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "54919f39b64b2c072934d3139d7cd3f6dc253b12fb6c39ad8855b7519a193367"`
[INFO] running `"docker" "rm" "-f" "54919f39b64b2c072934d3139d7cd3f6dc253b12fb6c39ad8855b7519a193367"`
[INFO] [stdout] 54919f39b64b2c072934d3139d7cd3f6dc253b12fb6c39ad8855b7519a193367
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/ranjeet-floyd/rust-hello-world:/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"`
[INFO] [stdout] f259208d0296984b11681c0c1a6577a0d752e11cb5b882ded848b633d8091aa8
[INFO] running `"docker" "start" "-a" "f259208d0296984b11681c0c1a6577a0d752e11cb5b882ded848b633d8091aa8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_hello_world-c233c663d7ef775c
[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" "f259208d0296984b11681c0c1a6577a0d752e11cb5b882ded848b633d8091aa8"`
[INFO] running `"docker" "rm" "-f" "f259208d0296984b11681c0c1a6577a0d752e11cb5b882ded848b633d8091aa8"`
[INFO] [stdout] f259208d0296984b11681c0c1a6577a0d752e11cb5b882ded848b633d8091aa8