[INFO] fetching crate leaf 0.2.1...
[INFO] testing leaf-0.2.1 against 1.47.0 for beta-1.48-1
[INFO] extracting crate leaf 0.2.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate leaf 0.2.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate leaf 0.2.1
[INFO] finished tweaking crates.io crate leaf 0.2.1
[INFO] tweaked toml for crates.io crate leaf 0.2.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 536365bc41f531e53468a11a84b5e72ad455976f06d165296c5ba79a0ac282fa
[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" "536365bc41f531e53468a11a84b5e72ad455976f06d165296c5ba79a0ac282fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "536365bc41f531e53468a11a84b5e72ad455976f06d165296c5ba79a0ac282fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "536365bc41f531e53468a11a84b5e72ad455976f06d165296c5ba79a0ac282fa", kill_on_drop: false }`
[INFO] [stdout] 536365bc41f531e53468a11a84b5e72ad455976f06d165296c5ba79a0ac282fa
[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=warn" "-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" "+1.47.0" "build" "--frozen" "--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] dd26880f10c41541999e60d8bc3cdba940bee15408f628e2aff716d32927e5cf
[INFO] running `Command { std: "docker" "start" "-a" "dd26880f10c41541999e60d8bc3cdba940bee15408f628e2aff716d32927e5cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling rblas v0.0.11
[INFO] [stderr]    Compiling linear-map v0.0.4
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling capnp v0.6.2
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling timeit v0.1.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stdout] error[E0502]: cannot borrow `*reff` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/capnp-0.6.2/src/private/layout.rs:639:47
[INFO] [stdout]     |
[INFO] [stdout] 639 |         let ptr = try!(follow_fars(&mut reff, (*reff).target(), &mut segment));
[INFO] [stdout]     |                        ----------- ---------  ^^^^^^^ immutable borrow occurs here
[INFO] [stdout]     |                        |           |
[INFO] [stdout]     |                        |           mutable borrow occurs here
[INFO] [stdout]     |                        mutable borrow later used by call
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `capnp`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dd26880f10c41541999e60d8bc3cdba940bee15408f628e2aff716d32927e5cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd26880f10c41541999e60d8bc3cdba940bee15408f628e2aff716d32927e5cf", kill_on_drop: false }`
[INFO] [stdout] dd26880f10c41541999e60d8bc3cdba940bee15408f628e2aff716d32927e5cf
