[INFO] fetching crate wl-tools 0.0.0-alpha.3...
[INFO] checking wl-tools-0.0.0-alpha.3 against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] extracting crate wl-tools 0.0.0-alpha.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate wl-tools 0.0.0-alpha.3 on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wl-tools 0.0.0-alpha.3
[INFO] finished tweaking crates.io crate wl-tools 0.0.0-alpha.3
[INFO] tweaked toml for crates.io crate wl-tools 0.0.0-alpha.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a8c10dd86a690cc5f7ad8c301fb89ce898665da47662449ecf2c4cc34103218
[INFO] running `Command { std: "docker" "start" "-a" "7a8c10dd86a690cc5f7ad8c301fb89ce898665da47662449ecf2c4cc34103218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a8c10dd86a690cc5f7ad8c301fb89ce898665da47662449ecf2c4cc34103218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a8c10dd86a690cc5f7ad8c301fb89ce898665da47662449ecf2c4cc34103218", kill_on_drop: false }`
[INFO] [stdout] 7a8c10dd86a690cc5f7ad8c301fb89ce898665da47662449ecf2c4cc34103218
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8143db654129bb07e3305b158ffff2aaf1fa818a85b01d4912384e691dded3d0
[INFO] running `Command { std: "docker" "start" "-a" "8143db654129bb07e3305b158ffff2aaf1fa818a85b01d4912384e691dded3d0", kill_on_drop: false }`
[INFO] [stderr]     Checking wl-tools v0.0.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling test-case-macros v2.2.2
[INFO] [stdout] warning: fields `char_lowercase` and `idx_range` are never read
[INFO] [stdout]    --> src/tree/word_char.rs:204:5
[INFO] [stdout]     |
[INFO] [stdout] 203 | struct WordCharTreeEdge<'a, W> {
[INFO] [stdout]     |        ---------------- fields in this struct
[INFO] [stdout] 204 |     char_lowercase: char,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 205 |     idx_range: RangeInclusive<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] [stderr]     Checking test-case v2.2.2
[INFO] [stdout] warning: fields `char_lowercase` and `idx_range` are never read
[INFO] [stdout]    --> src/tree/word_char.rs:204:5
[INFO] [stdout]     |
[INFO] [stdout] 203 | struct WordCharTreeEdge<'a, W> {
[INFO] [stdout]     |        ---------------- fields in this struct
[INFO] [stdout] 204 |     char_lowercase: char,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 205 |     idx_range: RangeInclusive<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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "8143db654129bb07e3305b158ffff2aaf1fa818a85b01d4912384e691dded3d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8143db654129bb07e3305b158ffff2aaf1fa818a85b01d4912384e691dded3d0", kill_on_drop: false }`
[INFO] [stdout] 8143db654129bb07e3305b158ffff2aaf1fa818a85b01d4912384e691dded3d0
[ERROR] this task or one of its parent failed!
[ERROR] error sending request for url (https://crater.rust-lang.org/agent-api/record-progress): connection closed before message completed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.