[INFO] fetching crate rsperftools 0.2.2...
[INFO] checking rsperftools-0.2.2 against beta-2019-10-27 for pr-65897
[INFO] extracting crate rsperftools 0.2.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rsperftools 0.2.2 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rsperftools 0.2.2
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate rsperftools 0.2.2
[INFO] tweaked toml for crates.io crate rsperftools 0.2.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate rsperftools 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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" "+beta-2019-10-27" "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] 80d8e6830749fc60ef5aab8c4029b9f41df87ef502a3affaca0b72e66addd1ef
[INFO] running `"docker" "start" "-a" "80d8e6830749fc60ef5aab8c4029b9f41df87ef502a3affaca0b72e66addd1ef"`
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking rsperftools v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `flamegraph` found for type `rsperftools::report::Report` in the current scope
[INFO] [stderr]    --> examples/flamegraph.rs:104:20
[INFO] [stderr]     |
[INFO] [stderr] 104 |             report.flamegraph(file).unwrap();
[INFO] [stderr]     |                    ^^^^^^^^^^ method not found in `rsperftools::report::Report`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `rsperftools`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "80d8e6830749fc60ef5aab8c4029b9f41df87ef502a3affaca0b72e66addd1ef"`
[INFO] running `"docker" "rm" "-f" "80d8e6830749fc60ef5aab8c4029b9f41df87ef502a3affaca0b72e66addd1ef"`
[INFO] [stdout] 80d8e6830749fc60ef5aab8c4029b9f41df87ef502a3affaca0b72e66addd1ef