[INFO] fetching crate rsflex 0.2.3...
[INFO] checking rsflex-0.2.3 against try#81275a1445c7502a974118e0c69b795ab60be991 for pr-80243
[INFO] extracting crate rsflex 0.2.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rsflex 0.2.3 on toolchain 81275a1445c7502a974118e0c69b795ab60be991
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rsflex 0.2.3
[INFO] finished tweaking crates.io crate rsflex 0.2.3
[INFO] tweaked toml for crates.io crate rsflex 0.2.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate rsflex 0.2.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "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] 10361a81d403d5351e1df545c024b6aa2c68d2c07190998be532092d63b0441e
[INFO] running `Command { std: "docker" "start" "-a" "10361a81d403d5351e1df545c024b6aa2c68d2c07190998be532092d63b0441e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10361a81d403d5351e1df545c024b6aa2c68d2c07190998be532092d63b0441e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10361a81d403d5351e1df545c024b6aa2c68d2c07190998be532092d63b0441e", kill_on_drop: false }`
[INFO] [stdout] 10361a81d403d5351e1df545c024b6aa2c68d2c07190998be532092d63b0441e
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f31079bfe19457add353a412aabdd8592370f9a28b2630c1028db3d15349b0d
[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" "6f31079bfe19457add353a412aabdd8592370f9a28b2630c1028db3d15349b0d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking rsflex v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.35s
[INFO] running `Command { std: "docker" "inspect" "6f31079bfe19457add353a412aabdd8592370f9a28b2630c1028db3d15349b0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f31079bfe19457add353a412aabdd8592370f9a28b2630c1028db3d15349b0d", kill_on_drop: false }`
[INFO] [stdout] 6f31079bfe19457add353a412aabdd8592370f9a28b2630c1028db3d15349b0d