[INFO] fetching crate flamegraph 0.4.0...
[INFO] checking flamegraph-0.4.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate flamegraph 0.4.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate flamegraph 0.4.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flamegraph 0.4.0
[INFO] finished tweaking crates.io crate flamegraph 0.4.0
[INFO] tweaked toml for crates.io crate flamegraph 0.4.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate flamegraph 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] c38cca71b023c59c26897f4066b8c5bf58d39fab04c8137a8ff0bacd651dda0a
[INFO] running `Command { std: "docker" "start" "-a" "c38cca71b023c59c26897f4066b8c5bf58d39fab04c8137a8ff0bacd651dda0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c38cca71b023c59c26897f4066b8c5bf58d39fab04c8137a8ff0bacd651dda0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c38cca71b023c59c26897f4066b8c5bf58d39fab04c8137a8ff0bacd651dda0a", kill_on_drop: false }`
[INFO] [stdout] c38cca71b023c59c26897f4066b8c5bf58d39fab04c8137a8ff0bacd651dda0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35dcc72e5009d1d501d8efc2e88bcf36b4183bbd17e5415aec6e1e2f526dae7b
[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" "35dcc72e5009d1d501d8efc2e88bcf36b4183bbd17e5415aec6e1e2f526dae7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking str_stack v0.1.0
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling ahash v0.6.1
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking rgb v0.8.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking quick-xml v0.20.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking const-random v0.1.13
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking dashmap v3.11.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking inferno v0.10.2
[INFO] [stderr]     Checking semver v0.10.0
[INFO] [stderr]     Checking cargo_metadata v0.11.4
[INFO] [stderr]     Checking flamegraph v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.52s
[INFO] running `Command { std: "docker" "inspect" "35dcc72e5009d1d501d8efc2e88bcf36b4183bbd17e5415aec6e1e2f526dae7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35dcc72e5009d1d501d8efc2e88bcf36b4183bbd17e5415aec6e1e2f526dae7b", kill_on_drop: false }`
[INFO] [stdout] 35dcc72e5009d1d501d8efc2e88bcf36b4183bbd17e5415aec6e1e2f526dae7b