[INFO] fetching crate webapp-frontend 1.0.0...
[INFO] checking webapp-frontend-1.0.0 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate webapp-frontend 1.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate webapp-frontend 1.0.0 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate webapp-frontend 1.0.0
[INFO] finished tweaking crates.io crate webapp-frontend 1.0.0
[INFO] tweaked toml for crates.io crate webapp-frontend 1.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--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-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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 203ad68df2c7902a8a5a450cd07eb2a54164a029c88eab98e3811a74024d6cd1
[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" "203ad68df2c7902a8a5a450cd07eb2a54164a029c88eab98e3811a74024d6cd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "203ad68df2c7902a8a5a450cd07eb2a54164a029c88eab98e3811a74024d6cd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "203ad68df2c7902a8a5a450cd07eb2a54164a029c88eab98e3811a74024d6cd1", kill_on_drop: false }`
[INFO] [stdout] 203ad68df2c7902a8a5a450cd07eb2a54164a029c88eab98e3811a74024d6cd1
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b72fe5a2305223b524ae647b5746615421f9e3017b61567ebc84bf45cc40f5c
[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" "6b72fe5a2305223b524ae647b5746615421f9e3017b61567ebc84bf45cc40f5c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.119
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]    Compiling base-x v0.2.8
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]     Checking discard v1.0.4
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling stdweb v0.4.20
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr] error: could not compile `backtrace`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name backtrace --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.55/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="addr2line"' --cfg 'feature="default"' --cfg 'feature="gimli-symbolize"' --cfg 'feature="miniz_oxide"' --cfg 'feature="object"' --cfg 'feature="std"' -C metadata=5d00f7bf6ef61ae1 -C extra-filename=-5d00f7bf6ef61ae1 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern addr2line=/opt/rustwide/target/debug/deps/libaddr2line-74e6f38f64272a0e.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-2909e55669d95bfc.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-d7ef7270a9bda5b7.rmeta --extern miniz_oxide=/opt/rustwide/target/debug/deps/libminiz_oxide-ff0e19ca06b205c8.rmeta --extern object=/opt/rustwide/target/debug/deps/libobject-cbbcfc982128e6f3.rmeta --extern rustc_demangle=/opt/rustwide/target/debug/deps/librustc_demangle-698284206b8201cd.rmeta --cap-lints allow --cap-lints=forbid` (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" "6b72fe5a2305223b524ae647b5746615421f9e3017b61567ebc84bf45cc40f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b72fe5a2305223b524ae647b5746615421f9e3017b61567ebc84bf45cc40f5c", kill_on_drop: false }`
[INFO] [stdout] 6b72fe5a2305223b524ae647b5746615421f9e3017b61567ebc84bf45cc40f5c