[INFO] fetching crate robust 0.2.3...
[INFO] checking robust-0.2.3 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate robust 0.2.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate robust 0.2.3 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate robust 0.2.3
[INFO] finished tweaking crates.io crate robust 0.2.3
[INFO] tweaked toml for crates.io crate robust 0.2.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate robust 0.2.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded deflate v0.8.6
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded adler32 v1.2.0
[INFO] [stderr]   Downloaded libc v0.2.80
[INFO] [stderr]   Downloaded float_extras v0.1.6
[INFO] [stderr]   Downloaded ieee754 v0.2.6
[INFO] [stderr]   Downloaded png v0.16.7
[INFO] [stderr]   Downloaded crc32fast v1.2.1
[INFO] [stderr]   Downloaded miniz_oxide v0.3.7
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a51fb671b1543dfe15290aa153cb9df08ff6f220b2b2ff84d09b66e23059cdc
[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" "8a51fb671b1543dfe15290aa153cb9df08ff6f220b2b2ff84d09b66e23059cdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a51fb671b1543dfe15290aa153cb9df08ff6f220b2b2ff84d09b66e23059cdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a51fb671b1543dfe15290aa153cb9df08ff6f220b2b2ff84d09b66e23059cdc", kill_on_drop: false }`
[INFO] [stdout] 8a51fb671b1543dfe15290aa153cb9df08ff6f220b2b2ff84d09b66e23059cdc
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10fd7fc709435f12b65e68acbc409f01aaff79bdaf7ed06fe4c5425c25a39f8d
[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" "10fd7fc709435f12b65e68acbc409f01aaff79bdaf7ed06fe4c5425c25a39f8d", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking robust v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking float_extras v0.1.6
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `Command { std: "docker" "inspect" "10fd7fc709435f12b65e68acbc409f01aaff79bdaf7ed06fe4c5425c25a39f8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10fd7fc709435f12b65e68acbc409f01aaff79bdaf7ed06fe4c5425c25a39f8d", kill_on_drop: false }`
[INFO] [stdout] 10fd7fc709435f12b65e68acbc409f01aaff79bdaf7ed06fe4c5425c25a39f8d