[INFO] fetching crate flamegraph 0.3.1...
[INFO] checking flamegraph-0.3.1 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate flamegraph 0.3.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate flamegraph 0.3.1 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flamegraph 0.3.1
[INFO] finished tweaking crates.io crate flamegraph 0.3.1
[INFO] tweaked toml for crates.io crate flamegraph 0.3.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate flamegraph 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64380d359db9c8684232c71b4fe4f2240068fda337a2d6cc5907b48295d4df4e
[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" "64380d359db9c8684232c71b4fe4f2240068fda337a2d6cc5907b48295d4df4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64380d359db9c8684232c71b4fe4f2240068fda337a2d6cc5907b48295d4df4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64380d359db9c8684232c71b4fe4f2240068fda337a2d6cc5907b48295d4df4e", kill_on_drop: false }`
[INFO] [stdout] 64380d359db9c8684232c71b4fe4f2240068fda337a2d6cc5907b48295d4df4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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] d41e135486db91cc80f156102a10b96a8f027a6573d88569661d05e400a2514d
[INFO] running `Command { std: "docker" "start" "-a" "d41e135486db91cc80f156102a10b96a8f027a6573d88569661d05e400a2514d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking bytemuck v1.3.1
[INFO] [stderr]     Checking str_stack v0.1.0
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking quick-xml v0.18.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking rgb v0.8.20
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking dashmap v3.11.7
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking inferno v0.9.9
[INFO] [stderr]     Checking cargo_metadata v0.10.0
[INFO] [stderr]     Checking flamegraph v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.98s
[INFO] running `Command { std: "docker" "inspect" "d41e135486db91cc80f156102a10b96a8f027a6573d88569661d05e400a2514d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d41e135486db91cc80f156102a10b96a8f027a6573d88569661d05e400a2514d", kill_on_drop: false }`
[INFO] [stdout] d41e135486db91cc80f156102a10b96a8f027a6573d88569661d05e400a2514d