[INFO] cloning repository https://github.com/nebler/eq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nebler/eq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebler%2Feq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebler%2Feq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb69f395ae0988b172bfabb3cfe1b5cec89633bb
[INFO] building nebler/eq against try#23647e694de8d0904848ad068b2e0ec2dd098c37+target=wasm32-wasip1 for pr-149868
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebler%2Feq" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nebler/eq
[INFO] finished tweaking git repo https://github.com/nebler/eq
[INFO] tweaked toml for git repo https://github.com/nebler/eq written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nebler/eq on toolchain 23647e694de8d0904848ad068b2e0ec2dd098c37
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nebler/eq already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 382e1b0b9dd98ecf888a0d4ee7fabcd694fc055afd90e013c36c91eb9023bb75
[INFO] running `Command { std: "docker" "start" "-a" "382e1b0b9dd98ecf888a0d4ee7fabcd694fc055afd90e013c36c91eb9023bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "382e1b0b9dd98ecf888a0d4ee7fabcd694fc055afd90e013c36c91eb9023bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "382e1b0b9dd98ecf888a0d4ee7fabcd694fc055afd90e013c36c91eb9023bb75", kill_on_drop: false }`
[INFO] [stdout] 382e1b0b9dd98ecf888a0d4ee7fabcd694fc055afd90e013c36c91eb9023bb75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "build" "--frozen" "--message-format=json" "--target" "wasm32-wasip1", kill_on_drop: false }`
[INFO] [stdout] 6bf9498c946165d16fa01ebed8089748504c0b36e2adf01ad39a7d7e5bdf1d5e
[INFO] running `Command { std: "docker" "start" "-a" "6bf9498c946165d16fa01ebed8089748504c0b36e2adf01ad39a7d7e5bdf1d5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency_book_1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         poll.poll(&mut events, None);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let _ = poll.poll(&mut events, None);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `rust-lld` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "rust-lld" "-flavor" "wasm" "--export" "__main_void" "-z" "stack-size=1048576" "--stack-first" "--no-demangle" "<sysroot>/lib/rustlib/wasm32-wasip1/lib/self-contained/crt1-command.o" "<2 object files omitted>" "-l" "c" "<sysroot>/lib/rustlib/wasm32-wasip1/lib/{libpanic_abort-*,libstd-*,libwasi-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*}.rlib" "-l" "c" "<sysroot>/lib/rustlib/wasm32-wasip1/lib/{librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-L" "<sysroot>/lib/rustlib/wasm32-wasip1/lib/self-contained" "-o" "/opt/rustwide/target/wasm32-wasip1/debug/deps/concurrency_book_1-58af1cd681c9d647.wasm" "--gc-sections" "-O0"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: /opt/rustwide/target/wasm32-wasip1/debug/deps/concurrency_book_1-58af1cd681c9d647.concurrency_book_1.795f6072aeaecf57-cgu.0.rcgu.o: undefined symbol: epoll_create
[INFO] [stdout]           rust-lld: error: /opt/rustwide/target/wasm32-wasip1/debug/deps/concurrency_book_1-58af1cd681c9d647.concurrency_book_1.795f6072aeaecf57-cgu.0.rcgu.o: undefined symbol: epoll_wait
[INFO] [stdout]           rust-lld: error: /opt/rustwide/target/wasm32-wasip1/debug/deps/concurrency_book_1-58af1cd681c9d647.concurrency_book_1.795f6072aeaecf57-cgu.0.rcgu.o: undefined symbol: epoll_ctl
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `concurrency_book_1` (bin "concurrency_book_1") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "6bf9498c946165d16fa01ebed8089748504c0b36e2adf01ad39a7d7e5bdf1d5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bf9498c946165d16fa01ebed8089748504c0b36e2adf01ad39a7d7e5bdf1d5e", kill_on_drop: false }`
[INFO] [stdout] 6bf9498c946165d16fa01ebed8089748504c0b36e2adf01ad39a7d7e5bdf1d5e