[INFO] updating cached repository mklein994/hello
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mklein994/hello
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mklein994/hello" "work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mklein994/hello" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mklein994/hello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mklein994/hello'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e4cca0c894cad3ee33d338428b94d47d541ab45
[INFO] sha for GitHub repo mklein994/hello: 0e4cca0c894cad3ee33d338428b94d47d541ab45
[INFO] validating manifest of mklein994/hello 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 mklein994/hello 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 mklein994/hello
[INFO] finished frobbing mklein994/hello
[INFO] frobbed toml for mklein994/hello written to work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello/Cargo.toml
[INFO] started frobbing mklein994/hello
[INFO] finished frobbing mklein994/hello
[INFO] frobbed toml for mklein994/hello written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mklein994/hello/Cargo.toml
[INFO] crate mklein994/hello 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 mklein994/hello 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello:/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] ae9dfd6b5457162a9122121fd0b6a8a31741491557a0f153f69ec96968e9557b
[INFO] running `"docker" "start" "-a" "ae9dfd6b5457162a9122121fd0b6a8a31741491557a0f153f69ec96968e9557b"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]  --> src/lib.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn new(size: u32) -> ThreadPool {
[INFO] [stderr]   |                ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> src/lib.rs:8:30
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn execute<F>(&self, f: F)
[INFO] [stderr]   |                              ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "ae9dfd6b5457162a9122121fd0b6a8a31741491557a0f153f69ec96968e9557b"`
[INFO] running `"docker" "rm" "-f" "ae9dfd6b5457162a9122121fd0b6a8a31741491557a0f153f69ec96968e9557b"`
[INFO] [stdout] ae9dfd6b5457162a9122121fd0b6a8a31741491557a0f153f69ec96968e9557b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello:/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] efd64bb1c650f99cb5a8b59ac8347485e7a27b0303e43183bffffcffe1b9895a
[INFO] running `"docker" "start" "-a" "efd64bb1c650f99cb5a8b59ac8347485e7a27b0303e43183bffffcffe1b9895a"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]  --> src/lib.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn new(size: u32) -> ThreadPool {
[INFO] [stderr]   |                ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> src/lib.rs:8:30
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn execute<F>(&self, f: F)
[INFO] [stderr]   |                              ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "efd64bb1c650f99cb5a8b59ac8347485e7a27b0303e43183bffffcffe1b9895a"`
[INFO] running `"docker" "rm" "-f" "efd64bb1c650f99cb5a8b59ac8347485e7a27b0303e43183bffffcffe1b9895a"`
[INFO] [stdout] efd64bb1c650f99cb5a8b59ac8347485e7a27b0303e43183bffffcffe1b9895a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mklein994/hello:/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] a740643270adb86ea69b6f59a246d03e2b3df027cb562a5c885b84baf35fff91
[INFO] running `"docker" "start" "-a" "a740643270adb86ea69b6f59a246d03e2b3df027cb562a5c885b84baf35fff91"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello-5b9dfb37170617c2
[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] [stderr]      Running /opt/crater/target/debug/deps/main-29b48f5505e9770f
[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] [stderr]    Doc-tests hello
[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" "a740643270adb86ea69b6f59a246d03e2b3df027cb562a5c885b84baf35fff91"`
[INFO] running `"docker" "rm" "-f" "a740643270adb86ea69b6f59a246d03e2b3df027cb562a5c885b84baf35fff91"`
[INFO] [stdout] a740643270adb86ea69b6f59a246d03e2b3df027cb562a5c885b84baf35fff91