[INFO] fetching crate flowrlib 0.8.8...
[INFO] checking flowrlib-0.8.8 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate flowrlib 0.8.8 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate flowrlib 0.8.8 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowrlib 0.8.8
[INFO] finished tweaking crates.io crate flowrlib 0.8.8
[INFO] tweaked toml for crates.io crate flowrlib 0.8.8 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55a2d26de935af2b9b1146862d3929e094738de32c2407a928cb723223f88a3b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "55a2d26de935af2b9b1146862d3929e094738de32c2407a928cb723223f88a3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55a2d26de935af2b9b1146862d3929e094738de32c2407a928cb723223f88a3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55a2d26de935af2b9b1146862d3929e094738de32c2407a928cb723223f88a3b", kill_on_drop: false }`
[INFO] [stdout] 55a2d26de935af2b9b1146862d3929e094738de32c2407a928cb723223f88a3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf9f2a8013e00a95fe2f28289b59ffae1b7538200c4282b170fe1c6826746aa4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cf9f2a8013e00a95fe2f28289b59ffae1b7538200c4282b170fe1c6826746aa4", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking memory_units v0.3.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking parity-wasm v0.31.3
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stderr]     Checking multimap v0.5.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking object v0.27.1
[INFO] [stderr]     Checking flow_impl v0.8.5
[INFO] [stderr]     Checking wasmi-validation v0.1.0
[INFO] [stderr]     Checking wasmi v0.4.5
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking flowrlib v0.8.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib_manifest.rs:184:27
[INFO] [stdout]     |
[INFO] [stdout] 184 |         struct TestImpl {};
[INFO] [stdout]     |                           ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `io_number`
[INFO] [stdout]   --> src/debugger.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     io_number: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `io_number`
[INFO] [stdout]   --> src/debugger.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     io_number: usize,
[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] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.30s
[INFO] running `Command { std: "docker" "inspect" "cf9f2a8013e00a95fe2f28289b59ffae1b7538200c4282b170fe1c6826746aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf9f2a8013e00a95fe2f28289b59ffae1b7538200c4282b170fe1c6826746aa4", kill_on_drop: false }`
[INFO] [stdout] cf9f2a8013e00a95fe2f28289b59ffae1b7538200c4282b170fe1c6826746aa4