[INFO] fetching crate web-bundler 0.1.4...
[INFO] checking web-bundler-0.1.4 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate web-bundler 0.1.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate web-bundler 0.1.4 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_ignored v0.0.4
[INFO] [stderr]   Downloaded scopeguard v0.3.3
[INFO] [stderr]   Downloaded env_logger v0.5.13
[INFO] [stderr]   Downloaded slug v0.1.4
[INFO] [stderr]   Downloaded deunicode v0.4.3
[INFO] [stderr]   Downloaded is_executable v0.1.2
[INFO] [stderr]   Downloaded tar v0.4.33
[INFO] [stderr]   Downloaded unic-ucd-segment v0.9.0
[INFO] [stderr]   Downloaded unic-common v0.9.0
[INFO] [stderr]   Downloaded globset v0.4.6
[INFO] [stderr]   Downloaded parse-zoneinfo v0.3.0
[INFO] [stderr]   Downloaded fs_extra v1.2.0
[INFO] [stderr]   Downloaded ignore v0.4.17
[INFO] [stderr]   Downloaded socket2 v0.4.0
[INFO] [stderr]   Downloaded dialoguer v0.3.0
[INFO] [stderr]   Downloaded which v2.0.1
[INFO] [stderr]   Downloaded zip v0.5.12
[INFO] [stderr]   Downloaded cargo_metadata v0.8.2
[INFO] [stderr]   Downloaded clicolors-control v0.2.0
[INFO] [stderr]   Downloaded bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]   Downloaded console v0.6.2
[INFO] [stderr]   Downloaded tera v1.8.0
[INFO] [stderr]   Downloaded wasm-pack v0.9.1
[INFO] [stderr]   Downloaded libz-sys v1.1.3
[INFO] [stderr]   Downloaded terminal_size v0.1.16
[INFO] [stderr]   Downloaded globwalk v0.8.1
[INFO] [stderr]   Downloaded unic-char-property v0.9.0
[INFO] [stderr]   Downloaded unic-char-range v0.9.0
[INFO] [stderr]   Downloaded chrono-tz v0.5.3
[INFO] [stderr]   Downloaded curl-sys v0.4.42+curl-7.76.0
[INFO] [stderr]   Downloaded unic-ucd-version v0.9.0
[INFO] [stderr]   Downloaded unic-segment v0.9.0
[INFO] [stderr]   Downloaded binary-install v0.0.2
[INFO] [stderr]   Downloaded termios v0.3.3
[INFO] [stderr]   Downloaded curl v0.4.36
[INFO] [stderr]   Downloaded console v0.14.1
[INFO] [stderr]   Downloaded encode_unicode v0.3.6
[INFO] [stderr]   Downloaded filetime v0.2.14
[INFO] [stderr]   Downloaded tempfile v2.2.0
[INFO] [stderr]   Downloaded os_type v2.2.0
[INFO] [stderr]   Downloaded human-panic v1.0.3
[INFO] [stderr]   Downloaded owning_ref v0.4.1
[INFO] [stderr]   Downloaded lock_api v0.1.5
[INFO] [stderr]   Downloaded parking_lot_core v0.3.1
[INFO] [stderr]   Downloaded parking_lot v0.6.4
[INFO] [stderr]   Downloaded structopt-derive v0.2.18
[INFO] [stderr]   Downloaded structopt v0.2.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 75ec99dd2fec0895ffa7b2922c6ebf40efbce390697db28da82e48a69bd7f98f
[INFO] running `Command { std: "docker" "start" "-a" "75ec99dd2fec0895ffa7b2922c6ebf40efbce390697db28da82e48a69bd7f98f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75ec99dd2fec0895ffa7b2922c6ebf40efbce390697db28da82e48a69bd7f98f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75ec99dd2fec0895ffa7b2922c6ebf40efbce390697db28da82e48a69bd7f98f", kill_on_drop: false }`
[INFO] [stdout] 75ec99dd2fec0895ffa7b2922c6ebf40efbce390697db28da82e48a69bd7f98f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abf5220e3b6d44b8060da572f72b578162ee98a2c83e918f556d3494df3f31f0
[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" "abf5220e3b6d44b8060da572f72b578162ee98a2c83e918f556d3494df3f31f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling curl v0.4.36
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking siphasher v0.2.3
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking is_executable v0.1.2
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]     Checking humansize v1.1.0
[INFO] [stderr]     Checking fs_extra v1.2.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]    Compiling curl-sys v0.4.42+curl-7.76.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking slug v0.1.4
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking encoding_rs v0.8.28
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking openssl-sys v0.9.63
[INFO] [stderr]     Checking unic-ucd-segment v0.9.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking backtrace v0.3.59
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking tar v0.4.33
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking unic-segment v0.9.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking openssl v0.10.34
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=403478c39288e3c8 -C extra-filename=-403478c39288e3c8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-50111b8f7188482d.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4972d66cc4bf7970.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-a81338cd23b23cba.rmeta --cap-lints allow --cap-lints=forbid --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path` (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" "abf5220e3b6d44b8060da572f72b578162ee98a2c83e918f556d3494df3f31f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf5220e3b6d44b8060da572f72b578162ee98a2c83e918f556d3494df3f31f0", kill_on_drop: false }`
[INFO] [stdout] abf5220e3b6d44b8060da572f72b578162ee98a2c83e918f556d3494df3f31f0