[INFO] fetching crate err-context 0.1.0...
[INFO] checking err-context-0.1.0 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate err-context 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate err-context 0.1.0 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate err-context 0.1.0
[INFO] finished tweaking crates.io crate err-context 0.1.0
[INFO] tweaked toml for crates.io crate err-context 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] d96b8e3ae56e255039194b7b976f18a4e5626b2ef993252f1c1d33c3bf6fb931
[INFO] running `Command { std: "docker" "start" "-a" "d96b8e3ae56e255039194b7b976f18a4e5626b2ef993252f1c1d33c3bf6fb931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d96b8e3ae56e255039194b7b976f18a4e5626b2ef993252f1c1d33c3bf6fb931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d96b8e3ae56e255039194b7b976f18a4e5626b2ef993252f1c1d33c3bf6fb931", kill_on_drop: false }`
[INFO] [stdout] d96b8e3ae56e255039194b7b976f18a4e5626b2ef993252f1c1d33c3bf6fb931
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 961846af81df65720a995503c3bb7c306e2e9c52eda6272b6538c1be9897a20a
[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" "961846af81df65720a995503c3bb7c306e2e9c52eda6272b6538c1be9897a20a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking tinyvec v0.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling pulldown-cmark v0.4.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking semver-parser v0.9.0
[INFO] [stderr]     Checking err-context v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking unicode-normalization v0.1.13
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking version-sync v0.8.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.26s
[INFO] running `Command { std: "docker" "inspect" "961846af81df65720a995503c3bb7c306e2e9c52eda6272b6538c1be9897a20a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "961846af81df65720a995503c3bb7c306e2e9c52eda6272b6538c1be9897a20a", kill_on_drop: false }`
[INFO] [stdout] 961846af81df65720a995503c3bb7c306e2e9c52eda6272b6538c1be9897a20a