[INFO] updating cached repository https://github.com/Idolf/rust-str-fuzz
[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] 630311fdcdc1320f7d1aa06dcf9175029c4233f1
[INFO] testing Idolf/rust-str-fuzz against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FIdolf%2Frust-str-fuzz" "work/builds/worker-8/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Idolf/rust-str-fuzz 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/Idolf/rust-str-fuzz
[INFO] finished tweaking git repo https://github.com/Idolf/rust-str-fuzz
[INFO] tweaked toml for git repo https://github.com/Idolf/rust-str-fuzz written to work/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Idolf/rust-str-fuzz 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 04cafb2dfbe81ae1b349cc73c6b6451598f029219029e7d4eef7f616f7ed18d6
[INFO] running `"docker" "start" "-a" "04cafb2dfbe81ae1b349cc73c6b6451598f029219029e7d4eef7f616f7ed18d6"`
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling tokio-executor v0.1.2 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.3 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio-timer v0.2.3 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling tokio-io v0.1.6 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio-reactor v0.1.1 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio-fs v0.1.0 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio-udp v0.1.0 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio-tcp v0.1.0 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling tokio v0.1.6 (https://github.com/tokio-rs/tokio.git#8c791fd0)
[INFO] [stderr]    Compiling foo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut threadpool = threadpool_builder.build();
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.82s
[INFO] running `"docker" "inspect" "04cafb2dfbe81ae1b349cc73c6b6451598f029219029e7d4eef7f616f7ed18d6"`
[INFO] running `"docker" "rm" "-f" "04cafb2dfbe81ae1b349cc73c6b6451598f029219029e7d4eef7f616f7ed18d6"`
[INFO] [stdout] 04cafb2dfbe81ae1b349cc73c6b6451598f029219029e7d4eef7f616f7ed18d6
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 4f64bb6a28a492e96f9edaa702d75a984ebd491812846130fffeea660235d3e7
[INFO] running `"docker" "start" "-a" "4f64bb6a28a492e96f9edaa702d75a984ebd491812846130fffeea660235d3e7"`
[INFO] [stderr]    Compiling foo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut threadpool = threadpool_builder.build();
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "4f64bb6a28a492e96f9edaa702d75a984ebd491812846130fffeea660235d3e7"`
[INFO] running `"docker" "rm" "-f" "4f64bb6a28a492e96f9edaa702d75a984ebd491812846130fffeea660235d3e7"`
[INFO] [stdout] 4f64bb6a28a492e96f9edaa702d75a984ebd491812846130fffeea660235d3e7
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 30db2df34121fbc8dbc278d343070a6f5354b460e6e7085bc057b3e0030c769b
[INFO] running `"docker" "start" "-a" "30db2df34121fbc8dbc278d343070a6f5354b460e6e7085bc057b3e0030c769b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/foo-ba5cc5723cc38c51
[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" "30db2df34121fbc8dbc278d343070a6f5354b460e6e7085bc057b3e0030c769b"`
[INFO] running `"docker" "rm" "-f" "30db2df34121fbc8dbc278d343070a6f5354b460e6e7085bc057b3e0030c769b"`
[INFO] [stdout] 30db2df34121fbc8dbc278d343070a6f5354b460e6e7085bc057b3e0030c769b