[INFO] fetching crate ramp 0.5.8...
[INFO] checking ramp-0.5.8 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate ramp 0.5.8 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ramp 0.5.8 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ramp 0.5.8
[INFO] finished tweaking crates.io crate ramp 0.5.8
[INFO] tweaked toml for crates.io crate ramp 0.5.8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ramp 0.5.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-ranges v1.0.0
[INFO] [stderr]   Downloaded aho-corasick v0.6.4
[INFO] [stderr]   Downloaded num-traits v0.1.40
[INFO] [stderr]   Downloaded num-integer v0.1.35
[INFO] [stderr]   Downloaded fuchsia-zircon v0.3.2
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded rand v0.3.16
[INFO] [stderr]   Downloaded regex v0.2.3
[INFO] [stderr]   Downloaded quickcheck v0.6.0
[INFO] [stderr]   Downloaded libc v0.2.29
[INFO] [stderr]   Downloaded fuchsia-zircon-sys v0.3.2
[INFO] [stderr]   Downloaded thread_local v0.3.5
[INFO] [stderr]   Downloaded log v0.3.8
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded num-bigint v0.1.40
[INFO] [stderr]   Downloaded cc v1.0.17
[INFO] [stderr]   Downloaded rand v0.4.1
[INFO] [stderr]   Downloaded rust-gmp v0.2.10
[INFO] [stderr]   Downloaded regex-syntax v0.4.1
[INFO] [stderr]   Downloaded ieee754 v0.2.2
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded lazy_static v1.0.0
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded winapi v0.3.5
[INFO] [stderr]   Downloaded rand v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b8831ed390814a7c548f5cec4afbac8ae967ebe2ea85e7425da0a93eee55c74
[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" "1b8831ed390814a7c548f5cec4afbac8ae967ebe2ea85e7425da0a93eee55c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b8831ed390814a7c548f5cec4afbac8ae967ebe2ea85e7425da0a93eee55c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b8831ed390814a7c548f5cec4afbac8ae967ebe2ea85e7425da0a93eee55c74", kill_on_drop: false }`
[INFO] [stdout] 1b8831ed390814a7c548f5cec4afbac8ae967ebe2ea85e7425da0a93eee55c74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7c62aae3c6fe6e753da137d9e893f29ef76cc5750a2c761ba644e0666650034
[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" "b7c62aae3c6fe6e753da137d9e893f29ef76cc5750a2c761ba644e0666650034", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]    Compiling num-traits v0.1.40
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]    Compiling rustc-cfg v0.2.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking ieee754 v0.2.2
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking rand v0.4.1
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.3
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking quickcheck v0.6.0
[INFO] [stderr]    Compiling ramp v0.5.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.86s
[INFO] running `Command { std: "docker" "inspect" "b7c62aae3c6fe6e753da137d9e893f29ef76cc5750a2c761ba644e0666650034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7c62aae3c6fe6e753da137d9e893f29ef76cc5750a2c761ba644e0666650034", kill_on_drop: false }`
[INFO] [stdout] b7c62aae3c6fe6e753da137d9e893f29ef76cc5750a2c761ba644e0666650034