[INFO] updating cached repository https://github.com/ferrous-systems/cargo-flamegraph
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/ferrous-systems/cargo-flamegraph
[INFO] [stderr]  * [new branch]      bors        -> bors
[INFO] [stderr]    4bab662..a2448ad  master      -> master
[INFO] [stderr]  * [new branch]      staging     -> staging
[INFO] [stderr]  * [new branch]      staging.tmp -> staging.tmp
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a2448addfad4e38659dfa24c961deafcea3ecceb
[INFO] checking ferrous-systems/cargo-flamegraph against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrous-systems%2Fcargo-flamegraph" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ferrous-systems/cargo-flamegraph on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ferrous-systems/cargo-flamegraph
[INFO] finished tweaking git repo https://github.com/ferrous-systems/cargo-flamegraph
[INFO] tweaked toml for git repo https://github.com/ferrous-systems/cargo-flamegraph written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ferrous-systems/cargo-flamegraph already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 44a949fe77ddf69ab9c20aff15016db354479f427858320fdf061c51c9b76d6a
[INFO] running `"docker" "start" "-a" "44a949fe77ddf69ab9c20aff15016db354479f427858320fdf061c51c9b76d6a"`
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking str_stack v0.1.0
[INFO] [stderr]     Checking signal-hook v0.1.8
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling structopt-derive v0.2.15
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking structopt v0.2.15
[INFO] [stderr]     Checking quick-xml v0.13.3
[INFO] [stderr]     Checking inferno v0.4.1
[INFO] [stderr]     Checking cargo_metadata v0.7.3
[INFO] [stderr]     Checking flamegraph v0.1.13 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.67s
[INFO] running `"docker" "inspect" "44a949fe77ddf69ab9c20aff15016db354479f427858320fdf061c51c9b76d6a"`
[INFO] running `"docker" "rm" "-f" "44a949fe77ddf69ab9c20aff15016db354479f427858320fdf061c51c9b76d6a"`
[INFO] [stdout] 44a949fe77ddf69ab9c20aff15016db354479f427858320fdf061c51c9b76d6a