[INFO] fetching crate silkroad 0.0.4...
[INFO] checking silkroad-0.0.4 against master#33a2c2487ac5d9927830ea4c1844335c6b9f77db for pr-113636
[INFO] extracting crate silkroad 0.0.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate silkroad 0.0.4 on toolchain 33a2c2487ac5d9927830ea4c1844335c6b9f77db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33a2c2487ac5d9927830ea4c1844335c6b9f77db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate silkroad 0.0.4
[INFO] finished tweaking crates.io crate silkroad 0.0.4
[INFO] tweaked toml for crates.io crate silkroad 0.0.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33a2c2487ac5d9927830ea4c1844335c6b9f77db" "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" "+33a2c2487ac5d9927830ea4c1844335c6b9f77db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-rustls v0.9.4
[INFO] [stderr]   Downloaded slog_derive v0.1.1
[INFO] [stderr]   Downloaded sct v0.5.0
[INFO] [stderr]   Downloaded webpki v0.19.1
[INFO] [stderr]   Downloaded rustls v0.15.2
[INFO] [stderr]   Downloaded webpki-roots v0.16.0
[INFO] [stderr]   Downloaded libgit2-sys v0.8.2
[INFO] [stderr]   Downloaded git2 v0.9.2
[INFO] [stderr]   Downloaded hex-serde v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+33a2c2487ac5d9927830ea4c1844335c6b9f77db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa10494a47e4460d35926466986a146a7ec911b48ed72de5c2b094851f3f8d32
[INFO] running `Command { std: "docker" "start" "-a" "fa10494a47e4460d35926466986a146a7ec911b48ed72de5c2b094851f3f8d32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa10494a47e4460d35926466986a146a7ec911b48ed72de5c2b094851f3f8d32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa10494a47e4460d35926466986a146a7ec911b48ed72de5c2b094851f3f8d32", kill_on_drop: false }`
[INFO] [stdout] fa10494a47e4460d35926466986a146a7ec911b48ed72de5c2b094851f3f8d32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+33a2c2487ac5d9927830ea4c1844335c6b9f77db" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fb0facd3fc43f7d9e810bd0a026961ca66cc1f6c6bb1c95284cd37df2b321b8
[INFO] running `Command { std: "docker" "start" "-a" "0fb0facd3fc43f7d9e810bd0a026961ca66cc1f6c6bb1c95284cd37df2b321b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling syn v2.0.25
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking untrusted v0.6.2
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking gimli v0.27.3
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling regex-syntax v0.7.4
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking object v0.31.1
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling openssl-sys v0.9.90
[INFO] [stderr]    Compiling backtrace v0.3.68
[INFO] [stderr]     Checking percent-encoding v2.3.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking form_urlencoded v1.2.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking url v2.4.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking itoa v1.0.8
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking addr2line v0.20.0
[INFO] [stderr]     Checking actix-service v0.4.2
[INFO] [stderr]    Compiling regex-automata v0.3.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling serde_json v1.0.102
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]    Compiling libz-sys v1.1.9
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/33a2c2487ac5d9927830ea4c1844335c6b9f77db/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.25/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=26f45aa7ffab4994 -C extra-filename=-26f45aa7ffab4994 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-54db9582258d1a1c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-b1a8447e1599ba26.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-04e98006bd35140f.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0fb0facd3fc43f7d9e810bd0a026961ca66cc1f6c6bb1c95284cd37df2b321b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fb0facd3fc43f7d9e810bd0a026961ca66cc1f6c6bb1c95284cd37df2b321b8", kill_on_drop: false }`
[INFO] [stdout] 0fb0facd3fc43f7d9e810bd0a026961ca66cc1f6c6bb1c95284cd37df2b321b8