[INFO] fetching crate fltk-webview 0.2.7...
[INFO] testing fltk-webview-0.2.7 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate fltk-webview 0.2.7 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate fltk-webview 0.2.7 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fltk-webview 0.2.7
[INFO] finished tweaking crates.io crate fltk-webview 0.2.7
[INFO] tweaked toml for crates.io crate fltk-webview 0.2.7 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate fltk-webview 0.2.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fltk v1.1.16
[INFO] [stderr]   Downloaded fltk-derive v1.1.16
[INFO] [stderr]   Downloaded fltk-webview-sys v0.2.7
[INFO] [stderr]   Downloaded fltk-sys v1.1.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 490c04ad5a9858e1c1227f105a2ef063e5086b72f543fb339ec912c5dcd9f309
[INFO] running `Command { std: "docker" "start" "-a" "490c04ad5a9858e1c1227f105a2ef063e5086b72f543fb339ec912c5dcd9f309", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "490c04ad5a9858e1c1227f105a2ef063e5086b72f543fb339ec912c5dcd9f309", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "490c04ad5a9858e1c1227f105a2ef063e5086b72f543fb339ec912c5dcd9f309", kill_on_drop: false }`
[INFO] [stdout] 490c04ad5a9858e1c1227f105a2ef063e5086b72f543fb339ec912c5dcd9f309
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c844ad507a3aa0038b9722e22cd8fa9b050711746d369e4cc615f5971defb75c
[INFO] running `Command { std: "docker" "start" "-a" "c844ad507a3aa0038b9722e22cd8fa9b050711746d369e4cc615f5971defb75c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling fltk-sys v1.1.16
[INFO] [stderr]    Compiling fltk-webview-sys v0.2.7
[INFO] [stderr]    Compiling fltk-derive v1.1.16
[INFO] [stderr] error: could not compile `fltk-derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name fltk_derive --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fltk-derive-1.1.16/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 -C metadata=ebd0a640b31dec31 -C extra-filename=-ebd0a640b31dec31 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern quote=/opt/rustwide/target/debug/deps/libquote-0b195ce8c0de0c29.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-ee9d003ce2e6e3eb.rlib --extern proc_macro --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c844ad507a3aa0038b9722e22cd8fa9b050711746d369e4cc615f5971defb75c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c844ad507a3aa0038b9722e22cd8fa9b050711746d369e4cc615f5971defb75c", kill_on_drop: false }`
[INFO] [stdout] c844ad507a3aa0038b9722e22cd8fa9b050711746d369e4cc615f5971defb75c