[INFO] fetching crate polyhorn-ios 0.4.0...
[INFO] checking polyhorn-ios-0.4.0 against master#1be5c8f90912c446ecbdc405cbc4a89f9acd20fd for pr-93394
[INFO] extracting crate polyhorn-ios 0.4.0 into /workspace/builds/worker-85/source
[INFO] validating manifest of crates.io crate polyhorn-ios 0.4.0 on toolchain 1be5c8f90912c446ecbdc405cbc4a89f9acd20fd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polyhorn-ios 0.4.0
[INFO] finished tweaking crates.io crate polyhorn-ios 0.4.0
[INFO] tweaked toml for crates.io crate polyhorn-ios 0.4.0 written to /workspace/builds/worker-85/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "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" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd2d89d7100452396ba887b89e55f629324ffdbc1f79b79ac60343a14eea027c
[INFO] running `Command { std: "docker" "start" "-a" "fd2d89d7100452396ba887b89e55f629324ffdbc1f79b79ac60343a14eea027c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd2d89d7100452396ba887b89e55f629324ffdbc1f79b79ac60343a14eea027c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd2d89d7100452396ba887b89e55f629324ffdbc1f79b79ac60343a14eea027c", kill_on_drop: false }`
[INFO] [stdout] fd2d89d7100452396ba887b89e55f629324ffdbc1f79b79ac60343a14eea027c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b7448a590fbf48928a3dac517a5582e7eb193f78ba6bc01ad2b866f1fedf972
[INFO] running `Command { std: "docker" "start" "-a" "5b7448a590fbf48928a3dac517a5582e7eb193f78ba6bc01ad2b866f1fedf972", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling crc32fast v1.3.1
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling bindgen v0.55.1
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.19
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling futures-io v0.3.19
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling xmlparser v0.13.3
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling float-cmp v0.5.3
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling rctree v0.3.3
[INFO] [stderr]    Compiling pico-args v0.3.4
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling strum v0.19.5
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking as-any v0.2.1
[INFO] [stderr]     Checking dispatch v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking proc-macro2 v1.0.36
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking data-url v0.1.1
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking simplecss v0.2.1
[INFO] [stderr]    Compiling humantime v1.3.0
[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-1.0.136/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 -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="std"' -C metadata=032f37fc0c4d866a -C extra-filename=-032f37fc0c4d866a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --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" "5b7448a590fbf48928a3dac517a5582e7eb193f78ba6bc01ad2b866f1fedf972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b7448a590fbf48928a3dac517a5582e7eb193f78ba6bc01ad2b866f1fedf972", kill_on_drop: false }`
[INFO] [stdout] 5b7448a590fbf48928a3dac517a5582e7eb193f78ba6bc01ad2b866f1fedf972