[INFO] fetching crate convec 2.0.1...
[INFO] testing convec-2.0.1 against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take3
[INFO] extracting crate convec 2.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate convec 2.0.1 on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate convec 2.0.1
[INFO] finished tweaking crates.io crate convec 2.0.1
[INFO] tweaked toml for crates.io crate convec 2.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded owning_ref v0.3.3
[INFO] [stderr]   Downloaded parking_lot_core v0.2.14
[INFO] [stderr]   Downloaded parking_lot v0.4.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 875fb4f2f3ba5db1c1b5d2db7fe0e30d3ef9a4588379291f43136ec35e2e28ae
[INFO] running `Command { std: "docker" "start" "-a" "875fb4f2f3ba5db1c1b5d2db7fe0e30d3ef9a4588379291f43136ec35e2e28ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "875fb4f2f3ba5db1c1b5d2db7fe0e30d3ef9a4588379291f43136ec35e2e28ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "875fb4f2f3ba5db1c1b5d2db7fe0e30d3ef9a4588379291f43136ec35e2e28ae", kill_on_drop: false }`
[INFO] [stdout] 875fb4f2f3ba5db1c1b5d2db7fe0e30d3ef9a4588379291f43136ec35e2e28ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] be9d197aaf3b66f2827a141291531af233ce751f28c77960acba042e2c0a2e29
[INFO] running `Command { std: "docker" "start" "-a" "be9d197aaf3b66f2827a141291531af233ce751f28c77960acba042e2c0a2e29", kill_on_drop: false }`
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling convec v2.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "be9d197aaf3b66f2827a141291531af233ce751f28c77960acba042e2c0a2e29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be9d197aaf3b66f2827a141291531af233ce751f28c77960acba042e2c0a2e29", kill_on_drop: false }`
[INFO] [stdout] be9d197aaf3b66f2827a141291531af233ce751f28c77960acba042e2c0a2e29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 0cf58a6d9a854ed5054b6568b5166d420d18591b607b6fe42c899faa7c28caa6
[INFO] running `Command { std: "docker" "start" "-a" "0cf58a6d9a854ed5054b6568b5166d420d18591b607b6fe42c899faa7c28caa6", kill_on_drop: false }`
[INFO] [stderr]    Compiling convec v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Option::<T>::is_some` that must be used
[INFO] [stdout]    --> src/lib.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                     stack.pop().is_some();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this has a value, consider `.unwrap()` instead
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "0cf58a6d9a854ed5054b6568b5166d420d18591b607b6fe42c899faa7c28caa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cf58a6d9a854ed5054b6568b5166d420d18591b607b6fe42c899faa7c28caa6", kill_on_drop: false }`
[INFO] [stdout] 0cf58a6d9a854ed5054b6568b5166d420d18591b607b6fe42c899faa7c28caa6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] d2746d992ae9d1b73126598501a2dc2659a9bf267eff7c9cc859714a50907b8a
[INFO] running `Command { std: "docker" "start" "-a" "d2746d992ae9d1b73126598501a2dc2659a9bf267eff7c9cc859714a50907b8a", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `Option::<T>::is_some` that must be used
[INFO] [stderr]    --> src/lib.rs:176:21
[INFO] [stderr]     |
[INFO] [stderr] 176 |                     stack.pop().is_some();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this has a value, consider `.unwrap()` instead
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `convec` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/convec-58da215485041fd1)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::constack ... ok
[INFO] [stdout] test tests::single_threaded_constack ... ok
[INFO] [stdout] test tests::single_threaded_aovec ... ok
[INFO] [stdout] test tests::aovec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 6.42s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d2746d992ae9d1b73126598501a2dc2659a9bf267eff7c9cc859714a50907b8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2746d992ae9d1b73126598501a2dc2659a9bf267eff7c9cc859714a50907b8a", kill_on_drop: false }`
[INFO] [stdout] d2746d992ae9d1b73126598501a2dc2659a9bf267eff7c9cc859714a50907b8a