[INFO] updating cached repository https://github.com/hon/study_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] fd7f5c6e1dc451214c9990f6c839ac755c1709fb
[INFO] testing hon/study_rust against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhon%2Fstudy_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/hon/study_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/hon/study_rust
[INFO] finished tweaking git repo https://github.com/hon/study_rust
[INFO] tweaked toml for git repo https://github.com/hon/study_rust written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/hon/study_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] dae6e9b39152ddee463ffdac66b9d62cfccdc907de29b4f2d0d89e71a3dfd1c5
[INFO] running `"docker" "start" "-a" "dae6e9b39152ddee463ffdac66b9d62cfccdc907de29b4f2d0d89e71a3dfd1c5"`
[INFO] [stderr]    Compiling study_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `consume`
[INFO] [stderr]   --> src/s_closure/mod.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let consume = || {
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_consume`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]  --> src/s_mutability/mod.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut x = 5;
[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 0.58s
[INFO] running `"docker" "inspect" "dae6e9b39152ddee463ffdac66b9d62cfccdc907de29b4f2d0d89e71a3dfd1c5"`
[INFO] running `"docker" "rm" "-f" "dae6e9b39152ddee463ffdac66b9d62cfccdc907de29b4f2d0d89e71a3dfd1c5"`
[INFO] [stdout] dae6e9b39152ddee463ffdac66b9d62cfccdc907de29b4f2d0d89e71a3dfd1c5
[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] 0503e56f1c11d30f708b090226f972906fe3da82368a354d8b3ba0adf4328e7e
[INFO] running `"docker" "start" "-a" "0503e56f1c11d30f708b090226f972906fe3da82368a354d8b3ba0adf4328e7e"`
[INFO] [stderr]    Compiling study_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `consume`
[INFO] [stderr]   --> src/s_closure/mod.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let consume = || {
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_consume`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]  --> src/s_mutability/mod.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut x = 5;
[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 0.96s
[INFO] running `"docker" "inspect" "0503e56f1c11d30f708b090226f972906fe3da82368a354d8b3ba0adf4328e7e"`
[INFO] running `"docker" "rm" "-f" "0503e56f1c11d30f708b090226f972906fe3da82368a354d8b3ba0adf4328e7e"`
[INFO] [stdout] 0503e56f1c11d30f708b090226f972906fe3da82368a354d8b3ba0adf4328e7e
[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] 36a91b82c8a313d6cede78b63f7f5fc6e05fd8ea088c4e33662137a98d1a056c
[INFO] running `"docker" "start" "-a" "36a91b82c8a313d6cede78b63f7f5fc6e05fd8ea088c4e33662137a98d1a056c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/study_rust-7f5919ae31238ff1
[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/rustwide/target/debug/deps/study_rust-5c0725d3b136adfa
[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 study_rust
[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" "36a91b82c8a313d6cede78b63f7f5fc6e05fd8ea088c4e33662137a98d1a056c"`
[INFO] running `"docker" "rm" "-f" "36a91b82c8a313d6cede78b63f7f5fc6e05fd8ea088c4e33662137a98d1a056c"`
[INFO] [stdout] 36a91b82c8a313d6cede78b63f7f5fc6e05fd8ea088c4e33662137a98d1a056c