[INFO] fetching crate err-derive 0.2.4...
[INFO] checking err-derive-0.2.4 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate err-derive 0.2.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate err-derive 0.2.4 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate err-derive 0.2.4
[INFO] finished tweaking crates.io crate err-derive 0.2.4
[INFO] tweaked toml for crates.io crate err-derive 0.2.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate err-derive 0.2.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.16
[INFO] [stderr]   Downloaded backtrace v0.3.45
[INFO] [stderr]   Downloaded proc-macro-error-attr v1.0.1
[INFO] [stderr]   Downloaded proc-macro-error v1.0.1
[INFO] [stderr]   Downloaded backtrace-sys v0.1.33
[INFO] [stderr]   Downloaded proc-macro2 v1.0.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] 2248480ccc22f62fbd3b308bdf2c4e0c0b7a757c91be28f4ee8253a6f0a6c6e2
[INFO] running `Command { std: "docker" "start" "-a" "2248480ccc22f62fbd3b308bdf2c4e0c0b7a757c91be28f4ee8253a6f0a6c6e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2248480ccc22f62fbd3b308bdf2c4e0c0b7a757c91be28f4ee8253a6f0a6c6e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2248480ccc22f62fbd3b308bdf2c4e0c0b7a757c91be28f4ee8253a6f0a6c6e2", kill_on_drop: false }`
[INFO] [stdout] 2248480ccc22f62fbd3b308bdf2c4e0c0b7a757c91be28f4ee8253a6f0a6c6e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] dfe0c65b6841b8c12697fcf566cd02d6bc17a0d2dfcba44c1da96ad7b04d48c2
[INFO] running `Command { std: "docker" "start" "-a" "dfe0c65b6841b8c12697fcf566cd02d6bc17a0d2dfcba44c1da96ad7b04d48c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking bytecount v0.4.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.1
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking backtrace v0.3.45
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling err-derive v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cargo_metadata v0.6.4
[INFO] [stderr]     Checking skeptic v0.13.4
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.05s
[INFO] running `Command { std: "docker" "inspect" "dfe0c65b6841b8c12697fcf566cd02d6bc17a0d2dfcba44c1da96ad7b04d48c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfe0c65b6841b8c12697fcf566cd02d6bc17a0d2dfcba44c1da96ad7b04d48c2", kill_on_drop: false }`
[INFO] [stdout] dfe0c65b6841b8c12697fcf566cd02d6bc17a0d2dfcba44c1da96ad7b04d48c2