[INFO] crate cafs 0.0.1 is already in cache
[INFO] testing cafs-0.0.1 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate cafs 0.0.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate cafs 0.0.1 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cafs 0.0.1
[INFO] finished tweaking crates.io crate cafs 0.0.1
[INFO] tweaked toml for crates.io crate cafs 0.0.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39b248e2ef4e7b4d22837a6a18300bde3c04813f22398290548062858c5cbb11
[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" "39b248e2ef4e7b4d22837a6a18300bde3c04813f22398290548062858c5cbb11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39b248e2ef4e7b4d22837a6a18300bde3c04813f22398290548062858c5cbb11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39b248e2ef4e7b4d22837a6a18300bde3c04813f22398290548062858c5cbb11", kill_on_drop: false }`
[INFO] [stdout] 39b248e2ef4e7b4d22837a6a18300bde3c04813f22398290548062858c5cbb11
[INFO] running `Command { std: "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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f97d0082401220ec8dce8d97b53af23e63a5c89bba39c975cd15e20e447cdcc6
[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" "f97d0082401220ec8dce8d97b53af23e63a5c89bba39c975cd15e20e447cdcc6", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling byteorder v0.4.2
[INFO] [stderr]    Compiling bitflags v0.1.1
[INFO] [stderr]    Compiling db-key v0.0.5
[INFO] [stderr]    Compiling debug-builders v0.1.0
[INFO] [stderr]    Compiling toml v0.1.30
[INFO] [stderr]    Compiling standback v0.2.9
[INFO] [stderr]    Compiling time v0.2.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling openssl-sys v0.7.17
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling capnp v0.6.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling leveldb-sys v2.0.6
[INFO] [stderr]    Compiling toml-config v0.1.1
[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" "f97d0082401220ec8dce8d97b53af23e63a5c89bba39c975cd15e20e447cdcc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f97d0082401220ec8dce8d97b53af23e63a5c89bba39c975cd15e20e447cdcc6", kill_on_drop: false }`
[INFO] [stdout] f97d0082401220ec8dce8d97b53af23e63a5c89bba39c975cd15e20e447cdcc6