[INFO] fetching crate web-bundler 0.1.4...
[INFO] testing web-bundler-0.1.4 against 1.55.0 for beta-1.56-1
[INFO] extracting crate web-bundler 0.1.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate web-bundler 0.1.4 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate web-bundler 0.1.4
[INFO] finished tweaking crates.io crate web-bundler 0.1.4
[INFO] tweaked toml for crates.io crate web-bundler 0.1.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 474c4760640bdd4e6b2e034f49ff55cee0f5aa3734efa7dfbff8c9c928111798
[INFO] running `Command { std: "docker" "start" "-a" "474c4760640bdd4e6b2e034f49ff55cee0f5aa3734efa7dfbff8c9c928111798", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "474c4760640bdd4e6b2e034f49ff55cee0f5aa3734efa7dfbff8c9c928111798", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "474c4760640bdd4e6b2e034f49ff55cee0f5aa3734efa7dfbff8c9c928111798", kill_on_drop: false }`
[INFO] [stdout] 474c4760640bdd4e6b2e034f49ff55cee0f5aa3734efa7dfbff8c9c928111798
[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=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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5586f0293bacba7451607cd9408e1bf53a3718eb7fcfd21463010d509652b0d4
[INFO] running `Command { std: "docker" "start" "-a" "5586f0293bacba7451607cd9408e1bf53a3718eb7fcfd21463010d509652b0d4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling curl v0.4.38
[INFO] [stderr]    Compiling unic-common v0.9.0
[INFO] [stderr]    Compiling unic-char-range v0.9.0
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling deunicode v0.4.3
[INFO] [stderr]    Compiling is_executable v0.1.2
[INFO] [stderr]    Compiling humansize v1.1.1
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling curl-sys v0.4.45+curl-7.78.0
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling socket2 v0.4.1
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling sass-sys v0.4.22
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling parse-zoneinfo v0.3.0
[INFO] [stderr]    Compiling os_type v2.3.0
[INFO] [stderr]    Compiling console v0.14.1
[INFO] [stderr]    Compiling tempfile v2.2.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling publicsuffix v1.5.6
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling unic-char-property v0.9.0
[INFO] [stderr]    Compiling clicolors-control v0.2.0
[INFO] [stderr]    Compiling unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tar v0.4.37
[INFO] [stderr]    Compiling slug v0.1.4
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling globset v0.4.8
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]    Compiling console v0.6.2
[INFO] [stderr]    Compiling unic-ucd-segment v0.9.0
[INFO] [stderr]    Compiling dialoguer v0.3.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr] error: could not compile `serde`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.130/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="serde_derive"' --cfg 'feature="std"' -C metadata=5bd5db85b1c1e067 -C extra-filename=-5bd5db85b1c1e067 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-b37a834da9c78a57.so --cap-lints allow --cap-lints=warn --cfg ops_bound --cfg core_reverse --cfg de_boxed_c_str --cfg de_boxed_path --cfg de_rc_dst --cfg core_duration --cfg integer128 --cfg range_inclusive --cfg iterator_try_fold --cfg num_nonzero --cfg serde_derive --cfg core_try_from --cfg num_nonzero_signed --cfg systemtime_checked_add --cfg std_atomic64 --cfg std_atomic` (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" "5586f0293bacba7451607cd9408e1bf53a3718eb7fcfd21463010d509652b0d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5586f0293bacba7451607cd9408e1bf53a3718eb7fcfd21463010d509652b0d4", kill_on_drop: false }`
[INFO] [stdout] 5586f0293bacba7451607cd9408e1bf53a3718eb7fcfd21463010d509652b0d4