[INFO] fetching crate varcon 0.5.0...
[INFO] checking varcon-0.5.0 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate varcon 0.5.0 into /workspace/builds/worker-87/source
[INFO] validating manifest of crates.io crate varcon 0.5.0 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate varcon 0.5.0
[INFO] finished tweaking crates.io crate varcon 0.5.0
[INFO] tweaked toml for crates.io crate varcon 0.5.0 written to /workspace/builds/worker-87/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5709e783252f7535fd03c64438454f23421c52a04b727df310ad7c86d3a25134
[INFO] running `Command { std: "docker" "start" "-a" "5709e783252f7535fd03c64438454f23421c52a04b727df310ad7c86d3a25134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5709e783252f7535fd03c64438454f23421c52a04b727df310ad7c86d3a25134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5709e783252f7535fd03c64438454f23421c52a04b727df310ad7c86d3a25134", kill_on_drop: false }`
[INFO] [stdout] 5709e783252f7535fd03c64438454f23421c52a04b727df310ad7c86d3a25134
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79b1a25937c65162e41162df4a502a35ceeefa8b8c5c18547ab4cfba3552364e
[INFO] running `Command { std: "docker" "start" "-a" "79b1a25937c65162e41162df4a502a35ceeefa8b8c5c18547ab4cfba3552364e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling enumflags2_derive v0.7.0
[INFO] [stderr]     Checking enumflags2 v0.7.1
[INFO] [stderr]     Checking varcon-core v2.1.0
[INFO] [stderr]     Checking varcon v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `varcon`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name varcon --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="all"' --cfg 'feature="default"' --cfg 'feature="flags"' -C metadata=ea8eea8712e34f12 -C extra-filename=-ea8eea8712e34f12 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern varcon_core=/opt/rustwide/target/debug/deps/libvarcon_core-77a1e7c91b55df96.rmeta --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" "79b1a25937c65162e41162df4a502a35ceeefa8b8c5c18547ab4cfba3552364e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b1a25937c65162e41162df4a502a35ceeefa8b8c5c18547ab4cfba3552364e", kill_on_drop: false }`
[INFO] [stdout] 79b1a25937c65162e41162df4a502a35ceeefa8b8c5c18547ab4cfba3552364e