[INFO] fetching crate gaze 0.5.0...
[INFO] testing gaze-0.5.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate gaze 0.5.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate gaze 0.5.0
[INFO] finished tweaking crates.io crate gaze 0.5.0
[INFO] tweaked toml for crates.io crate gaze 0.5.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gaze 0.5.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e71eff9e42f67e6dfd09340f480ca960cb9971713d284b3927b2178129829ea8
[INFO] running `Command { std: "docker" "start" "-a" "e71eff9e42f67e6dfd09340f480ca960cb9971713d284b3927b2178129829ea8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e71eff9e42f67e6dfd09340f480ca960cb9971713d284b3927b2178129829ea8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e71eff9e42f67e6dfd09340f480ca960cb9971713d284b3927b2178129829ea8", kill_on_drop: false }`
[INFO] [stdout] e71eff9e42f67e6dfd09340f480ca960cb9971713d284b3927b2178129829ea8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 4fd74d5421361c6cb25b1191e042d091adfec7d288f36a2ed3b892c0ee915c1f
[INFO] running `Command { std: "docker" "start" "-a" "4fd74d5421361c6cb25b1191e042d091adfec7d288f36a2ed3b892c0ee915c1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling gaze v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "4fd74d5421361c6cb25b1191e042d091adfec7d288f36a2ed3b892c0ee915c1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd74d5421361c6cb25b1191e042d091adfec7d288f36a2ed3b892c0ee915c1f", kill_on_drop: false }`
[INFO] [stdout] 4fd74d5421361c6cb25b1191e042d091adfec7d288f36a2ed3b892c0ee915c1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 91b4072cb10d99af2f2025d2353e64838df02d32f6922a1696e9574d860aff32
[INFO] running `Command { std: "docker" "start" "-a" "91b4072cb10d99af2f2025d2353e64838df02d32f6922a1696e9574d860aff32", kill_on_drop: false }`
[INFO] [stderr]    Compiling gaze v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `is_text` is never used
[INFO] [stdout]   --> tests/gaze_spec.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn is_text(s: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_2` is never used
[INFO] [stdout]   --> tests/gaze_spec.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn take_2<I>(gaze: &mut Gaze<I>) -> Option<Vec<I>>
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "91b4072cb10d99af2f2025d2353e64838df02d32f6922a1696e9574d860aff32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91b4072cb10d99af2f2025d2353e64838df02d32f6922a1696e9574d860aff32", kill_on_drop: false }`
[INFO] [stdout] 91b4072cb10d99af2f2025d2353e64838df02d32f6922a1696e9574d860aff32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b6028057e20c03bdd5069d165cb7c10c82a2f6ee3b159fb52935949fbbffa06f
[INFO] running `Command { std: "docker" "start" "-a" "b6028057e20c03bdd5069d165cb7c10c82a2f6ee3b159fb52935949fbbffa06f", kill_on_drop: false }`
[INFO] [stderr] warning: function `is_text` is never used
[INFO] [stderr]   --> tests/gaze_spec.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn is_text(s: &str) -> bool {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_2` is never used
[INFO] [stderr]   --> tests/gaze_spec.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn take_2<I>(gaze: &mut Gaze<I>) -> Option<Vec<I>>
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `gaze` (test "gaze_spec") generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/gaze-ffa5f03ca4d75f89)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running tests/gaze_spec.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/gaze_spec-dba6f20837e15d56)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test take_first ... ok
[INFO] [stdout] test take_nibbler ... ok
[INFO] [stdout] test take_first_and_map ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b6028057e20c03bdd5069d165cb7c10c82a2f6ee3b159fb52935949fbbffa06f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6028057e20c03bdd5069d165cb7c10c82a2f6ee3b159fb52935949fbbffa06f", kill_on_drop: false }`
[INFO] [stdout] b6028057e20c03bdd5069d165cb7c10c82a2f6ee3b159fb52935949fbbffa06f