[INFO] updating cached repository https://github.com/syhpoon/learnfs
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1904f1ba8cebb7c747afe978793ea792e125297b
[INFO] checking syhpoon/learnfs against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsyhpoon%2Flearnfs" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/syhpoon/learnfs on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/syhpoon/learnfs
[INFO] finished tweaking git repo https://github.com/syhpoon/learnfs
[INFO] tweaked toml for git repo https://github.com/syhpoon/learnfs written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/syhpoon/learnfs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "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] cf50d898bf5dba0acf9751bc01fc1511b62cbb4d6e26e142420c180858d3a2dc
[INFO] running `"docker" "start" "-a" "cf50d898bf5dba0acf9751bc01fc1511b62cbb4d6e26e142420c180858d3a2dc"`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking tower-service v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-layer v0.3.0-alpha.2
[INFO] [stderr]     Checking smallvec v0.6.12
[INFO] [stderr]    Compiling unicode-segmentation v1.5.0
[INFO] [stderr]     Checking arc-swap v0.4.3
[INFO] [stderr]    Compiling serde-big-array v0.2.0
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling itertools v0.8.1
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling memoffset v0.5.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking tracing-core v0.1.7
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking backtrace-sys v0.1.31
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking flate2 v1.0.12
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking backtrace v0.3.38
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking signal-hook v0.1.11
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking http-body v0.2.0-alpha.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling prost-build v0.5.0
[INFO] [stderr]    Compiling prost v0.5.0
[INFO] [stderr]    Compiling prost-types v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]    Compiling async-stream-impl v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.17
[INFO] [stderr]     Checking async-stream v0.1.2
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tower-discover v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-util v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-load-shed v0.3.0-alpha.2
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde-value v0.5.3
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-make v0.3.0-alpha.2a
[INFO] [stderr] error[E0425]: cannot find value `__tracing_attr_span` in this scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tokio-executor-0.2.0-alpha.6/src/threadpool/pool/mod.rs:136:65
[INFO] [stderr]     |
[INFO] [stderr] 136 |       pub(crate) fn shutdown(&self, now: bool, purge_queue: bool) {
[INFO] [stderr]     |  _________________________________________________________________^
[INFO] [stderr] 137 | |         let mut state: State = self.state.load(Acquire).into();
[INFO] [stderr] 138 | |         trace!(?state);
[INFO] [stderr] 139 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 194 | |         self.terminate_sleeping_workers();
[INFO] [stderr] 195 | |     }
[INFO] [stderr]     | |_____^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr]     Checking h2 v0.2.0-alpha.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking log4rs v0.8.3
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `tokio-executor`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "cf50d898bf5dba0acf9751bc01fc1511b62cbb4d6e26e142420c180858d3a2dc"`
[INFO] running `"docker" "rm" "-f" "cf50d898bf5dba0acf9751bc01fc1511b62cbb4d6e26e142420c180858d3a2dc"`
[INFO] [stdout] cf50d898bf5dba0acf9751bc01fc1511b62cbb4d6e26e142420c180858d3a2dc