[INFO] updating cached repository prestonwl/rustlang101
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/prestonwl/rustlang101
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/prestonwl/rustlang101" "work/ex/beta-1.38-1/sources/1.37.0/gh/prestonwl/rustlang101"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/prestonwl/rustlang101'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/prestonwl/rustlang101" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/prestonwl/rustlang101"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/prestonwl/rustlang101'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 23f44d0250204e9b1bf1f49dd2f4e28bbd18a719
[INFO] sha for GitHub repo prestonwl/rustlang101: 23f44d0250204e9b1bf1f49dd2f4e28bbd18a719
[INFO] validating manifest of prestonwl/rustlang101 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 prestonwl/rustlang101 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 prestonwl/rustlang101
[INFO] finished frobbing prestonwl/rustlang101
[INFO] frobbed toml for prestonwl/rustlang101 written to work/ex/beta-1.38-1/sources/1.37.0/gh/prestonwl/rustlang101/Cargo.toml
[INFO] started frobbing prestonwl/rustlang101
[INFO] finished frobbing prestonwl/rustlang101
[INFO] frobbed toml for prestonwl/rustlang101 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/prestonwl/rustlang101/Cargo.toml
[INFO] crate prestonwl/rustlang101 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 prestonwl/rustlang101 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-1/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/prestonwl/rustlang101:/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] d8673de9fa2cf2a320381b911217f6a88c746b2c766d45204c1540978f2613ef
[INFO] running `"docker" "start" "-a" "d8673de9fa2cf2a320381b911217f6a88c746b2c766d45204c1540978f2613ef"`
[INFO] [stderr]    Compiling play v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `randatk` is never read
[INFO] [stderr]   --> src/main.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut randatk: i32 = 0;
[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 1.03s
[INFO] running `"docker" "inspect" "d8673de9fa2cf2a320381b911217f6a88c746b2c766d45204c1540978f2613ef"`
[INFO] running `"docker" "rm" "-f" "d8673de9fa2cf2a320381b911217f6a88c746b2c766d45204c1540978f2613ef"`
[INFO] [stdout] d8673de9fa2cf2a320381b911217f6a88c746b2c766d45204c1540978f2613ef
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/prestonwl/rustlang101:/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] a526f76cde20b9e9ce9eb5c858a4fc9c6ea357b3e890d8eef1baa2d813b963e4
[INFO] running `"docker" "start" "-a" "a526f76cde20b9e9ce9eb5c858a4fc9c6ea357b3e890d8eef1baa2d813b963e4"`
[INFO] [stderr]    Compiling play v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `randatk` is never read
[INFO] [stderr]   --> src/main.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut randatk: i32 = 0;
[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 0.72s
[INFO] running `"docker" "inspect" "a526f76cde20b9e9ce9eb5c858a4fc9c6ea357b3e890d8eef1baa2d813b963e4"`
[INFO] running `"docker" "rm" "-f" "a526f76cde20b9e9ce9eb5c858a4fc9c6ea357b3e890d8eef1baa2d813b963e4"`
[INFO] [stdout] a526f76cde20b9e9ce9eb5c858a4fc9c6ea357b3e890d8eef1baa2d813b963e4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/prestonwl/rustlang101:/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] 4d4034670d066324aa08cad1aea27b8133991310e0d2fd21a7edf178a488f999
[INFO] running `"docker" "start" "-a" "4d4034670d066324aa08cad1aea27b8133991310e0d2fd21a7edf178a488f999"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/play-5b4de1c449885808
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4d4034670d066324aa08cad1aea27b8133991310e0d2fd21a7edf178a488f999"`
[INFO] running `"docker" "rm" "-f" "4d4034670d066324aa08cad1aea27b8133991310e0d2fd21a7edf178a488f999"`
[INFO] [stdout] 4d4034670d066324aa08cad1aea27b8133991310e0d2fd21a7edf178a488f999