[INFO] fetching crate isolate 0.1.2...
[INFO] testing isolate-0.1.2 against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4
[INFO] extracting crate isolate 0.1.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate isolate 0.1.2 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 isolate 0.1.2
[INFO] finished tweaking crates.io crate isolate 0.1.2
[INFO] tweaked toml for crates.io crate isolate 0.1.2 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 docopt v0.8.3
[INFO] [stderr]   Downloaded unshare v0.2.0
[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] 011873e23a918e6f6f33a86beeda68078e8c4bbc521ef66967f6c02c10e47145
[INFO] running `Command { std: "docker" "start" "-a" "011873e23a918e6f6f33a86beeda68078e8c4bbc521ef66967f6c02c10e47145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "011873e23a918e6f6f33a86beeda68078e8c4bbc521ef66967f6c02c10e47145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "011873e23a918e6f6f33a86beeda68078e8c4bbc521ef66967f6c02c10e47145", kill_on_drop: false }`
[INFO] [stdout] 011873e23a918e6f6f33a86beeda68078e8c4bbc521ef66967f6c02c10e47145
[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] 7be946423791cffa8bae763d320de95568759f755843d69273fc3b3329a17b4a
[INFO] running `Command { std: "docker" "start" "-a" "7be946423791cffa8bae763d320de95568759f755843d69273fc3b3329a17b4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling serde v1.0.150
[INFO] [stderr]    Compiling ucd-util v0.1.9
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.150
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling unshare v0.2.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling isolate v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]    --> src/main.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | struct Command {
[INFO] [stdout]     |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 144 |     config: Configuration,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.94s
[INFO] running `Command { std: "docker" "inspect" "7be946423791cffa8bae763d320de95568759f755843d69273fc3b3329a17b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7be946423791cffa8bae763d320de95568759f755843d69273fc3b3329a17b4a", kill_on_drop: false }`
[INFO] [stdout] 7be946423791cffa8bae763d320de95568759f755843d69273fc3b3329a17b4a
[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] 04953b616dbb4156e725f64de6a782c5b19b5f47686e516d8c22ce3764a76af7
[INFO] running `Command { std: "docker" "start" "-a" "04953b616dbb4156e725f64de6a782c5b19b5f47686e516d8c22ce3764a76af7", kill_on_drop: false }`
[INFO] [stderr]    Compiling isolate v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]    --> src/main.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | struct Command {
[INFO] [stdout]     |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 144 |     config: Configuration,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 0.54s
[INFO] running `Command { std: "docker" "inspect" "04953b616dbb4156e725f64de6a782c5b19b5f47686e516d8c22ce3764a76af7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04953b616dbb4156e725f64de6a782c5b19b5f47686e516d8c22ce3764a76af7", kill_on_drop: false }`
[INFO] [stdout] 04953b616dbb4156e725f64de6a782c5b19b5f47686e516d8c22ce3764a76af7
[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] fc8ee836413b30cb5d507e02a49585da5f836c86e2526f77b260bff22d2c994d
[INFO] running `Command { std: "docker" "start" "-a" "fc8ee836413b30cb5d507e02a49585da5f836c86e2526f77b260bff22d2c994d", kill_on_drop: false }`
[INFO] [stderr] warning: field `config` is never read
[INFO] [stdout] 
[INFO] [stderr]    --> src/main.rs:144:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 141 | struct Command {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |        ------- field in this struct
[INFO] [stdout] 
[INFO] [stderr] ...
[INFO] [stderr] 144 |     config: Configuration,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `isolate` (bin "isolate" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/isolate-4840f0bfc0eac8c7)
[INFO] running `Command { std: "docker" "inspect" "fc8ee836413b30cb5d507e02a49585da5f836c86e2526f77b260bff22d2c994d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc8ee836413b30cb5d507e02a49585da5f836c86e2526f77b260bff22d2c994d", kill_on_drop: false }`
[INFO] [stdout] fc8ee836413b30cb5d507e02a49585da5f836c86e2526f77b260bff22d2c994d