[INFO] updating cached repository https://github.com/d-silvas/intro-to-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c3bfa0461d1eb0474a22312c85e57430c1839c5e
[INFO] testing d-silvas/intro-to-rust against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd-silvas%2Fintro-to-rust" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/d-silvas/intro-to-rust on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/d-silvas/intro-to-rust
[INFO] finished tweaking git repo https://github.com/d-silvas/intro-to-rust
[INFO] tweaked toml for git repo https://github.com/d-silvas/intro-to-rust written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/d-silvas/intro-to-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 36a9dfccb1144b2972d59122ab81e413118d4b9a8547045be859e73fd82b4746
[INFO] running `"docker" "start" "-a" "36a9dfccb1144b2972d59122ab81e413118d4b9a8547045be859e73fd82b4746"`
[INFO] [stderr]    Compiling intro-to-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:7:7
[INFO] [stderr]   |
[INFO] [stderr] 7 |   let x = 1;
[INFO] [stderr]   |       ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:27:7
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let z = &y;
[INFO] [stderr]    |       ^ help: consider prefixing with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "36a9dfccb1144b2972d59122ab81e413118d4b9a8547045be859e73fd82b4746"`
[INFO] running `"docker" "rm" "-f" "36a9dfccb1144b2972d59122ab81e413118d4b9a8547045be859e73fd82b4746"`
[INFO] [stdout] 36a9dfccb1144b2972d59122ab81e413118d4b9a8547045be859e73fd82b4746
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 64d9f97d7caf2e8b70354d1f2a05592513ca7a96aaec29d0b360aed6da18102d
[INFO] running `"docker" "start" "-a" "64d9f97d7caf2e8b70354d1f2a05592513ca7a96aaec29d0b360aed6da18102d"`
[INFO] [stderr]    Compiling intro-to-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:7:7
[INFO] [stderr]   |
[INFO] [stderr] 7 |   let x = 1;
[INFO] [stderr]   |       ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:27:7
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let z = &y;
[INFO] [stderr]    |       ^ help: consider prefixing with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "64d9f97d7caf2e8b70354d1f2a05592513ca7a96aaec29d0b360aed6da18102d"`
[INFO] running `"docker" "rm" "-f" "64d9f97d7caf2e8b70354d1f2a05592513ca7a96aaec29d0b360aed6da18102d"`
[INFO] [stdout] 64d9f97d7caf2e8b70354d1f2a05592513ca7a96aaec29d0b360aed6da18102d
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 759dac0fde10ae57f9d14b36354699e4d9709e710be18bd79f7b473989fa61f5
[INFO] running `"docker" "start" "-a" "759dac0fde10ae57f9d14b36354699e4d9709e710be18bd79f7b473989fa61f5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/intro_to_rust-fb30bdd9d7a60133
[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" "759dac0fde10ae57f9d14b36354699e4d9709e710be18bd79f7b473989fa61f5"`
[INFO] running `"docker" "rm" "-f" "759dac0fde10ae57f9d14b36354699e4d9709e710be18bd79f7b473989fa61f5"`
[INFO] [stdout] 759dac0fde10ae57f9d14b36354699e4d9709e710be18bd79f7b473989fa61f5