[INFO] updating cached repository rtalwar26/rust-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rtalwar26/rust-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rtalwar26/rust-playground" "work/ex/beta-1.37-6/sources/1.36.0/gh/rtalwar26/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/rtalwar26/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rtalwar26/rust-playground" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3acc2aca496baa888e75140b5535f559d7648baf
[INFO] sha for GitHub repo rtalwar26/rust-playground: 3acc2aca496baa888e75140b5535f559d7648baf
[INFO] validating manifest of rtalwar26/rust-playground 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 rtalwar26/rust-playground 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 rtalwar26/rust-playground
[INFO] finished frobbing rtalwar26/rust-playground
[INFO] frobbed toml for rtalwar26/rust-playground written to work/ex/beta-1.37-6/sources/1.36.0/gh/rtalwar26/rust-playground/Cargo.toml
[INFO] started frobbing rtalwar26/rust-playground
[INFO] finished frobbing rtalwar26/rust-playground
[INFO] frobbed toml for rtalwar26/rust-playground written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground/Cargo.toml
[INFO] crate rtalwar26/rust-playground 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing rtalwar26/rust-playground against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 773588d035c4c35d1acf0413effa94cc70ef903c44aa0adb07b1fce4be1c95fe
[INFO] running `"docker" "start" "-a" "773588d035c4c35d1acf0413effa94cc70ef903c44aa0adb07b1fce4be1c95fe"`
[INFO] [stderr]    Compiling myrust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |    let d = models::dog();
[INFO] [stderr]    |        ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let t: Rc<String> = s.clone();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]    --> src/main.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let u = s.clone();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `"docker" "inspect" "773588d035c4c35d1acf0413effa94cc70ef903c44aa0adb07b1fce4be1c95fe"`
[INFO] running `"docker" "rm" "-f" "773588d035c4c35d1acf0413effa94cc70ef903c44aa0adb07b1fce4be1c95fe"`
[INFO] [stdout] 773588d035c4c35d1acf0413effa94cc70ef903c44aa0adb07b1fce4be1c95fe
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3634da47e2669cc91c3735093bab99f21da5c7120f83ad5e809248c7b9ad2d14
[INFO] running `"docker" "start" "-a" "3634da47e2669cc91c3735093bab99f21da5c7120f83ad5e809248c7b9ad2d14"`
[INFO] [stderr]    Compiling myrust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |    let d = models::dog();
[INFO] [stderr]    |        ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let t: Rc<String> = s.clone();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]    --> src/main.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let u = s.clone();
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "3634da47e2669cc91c3735093bab99f21da5c7120f83ad5e809248c7b9ad2d14"`
[INFO] running `"docker" "rm" "-f" "3634da47e2669cc91c3735093bab99f21da5c7120f83ad5e809248c7b9ad2d14"`
[INFO] [stdout] 3634da47e2669cc91c3735093bab99f21da5c7120f83ad5e809248c7b9ad2d14
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rtalwar26/rust-playground:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 4f6c4dddb46c3fa0783728f96fa8fe9426e011d617c3abbcbfda43c9c525a48d
[INFO] running `"docker" "start" "-a" "4f6c4dddb46c3fa0783728f96fa8fe9426e011d617c3abbcbfda43c9c525a48d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/myrust-150c7ad161615035
[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" "4f6c4dddb46c3fa0783728f96fa8fe9426e011d617c3abbcbfda43c9c525a48d"`
[INFO] running `"docker" "rm" "-f" "4f6c4dddb46c3fa0783728f96fa8fe9426e011d617c3abbcbfda43c9c525a48d"`
[INFO] [stdout] 4f6c4dddb46c3fa0783728f96fa8fe9426e011d617c3abbcbfda43c9c525a48d